Louis Agassiz (, in English), May 28, 1807 – December 14, 1873, was a Swiss-born and European-trained Cuvier and von Humboldt in Paris, Agassiz proceeded with research leading to his appointment as professor of natural history at University of Neuchâtel.
After visiting Harvard University mid-career, he emigrated to the U.S. in 1847 and became a professor of zoology and geology at Harvard, and to head its Lawrence Scientific School and found its Museum of Comparative Zoology. Agassiz made extensive contributions to ichthyological classification (including of extinct species) and to the study of geological history (including to the founding of glaciology), and has become broadly known through student descriptions a thorough regimen of observational data gathering and analysis. The impressiveness of his vast institutional and scientific contributions to zoology, geology, and related areas—including many multivolume research series running to thousands of pages—has been somewhat tarnished by the evidence of his resistance to theories of Darwinian evolution, and his extensive later writings on polygenism.
Louis Agassiz was born in Môtier (now part of ichthyology, but it soon became the focus of his life's work.
In 1819–1820, Johann Baptist von Spix and Carl Friedrich Philipp von Martius were engaged in an expedition to Brazil, and on their return to Europe, amongst other collections of natural objects they brought home an important set of the fresh water fish of Brazil, and especially of the Amazon River. Spix, who died in 1826, did not live long enough to work out the history of these fish, and Agassiz (though fresh out of school) was selected by Martius for this purpose. He at once threw himself into the work with an enthusiasm which characterized him to the end of his busy life. The task of describing the Brazilian fish was completed and published in 1829. This was followed by research into the history of the fish found in Lake Neuchâtel. Enlarging his plans, in 1830 he issued a prospectus of a History of the Freshwater Fish of Central Europe. It was only in 1839, however, that the first part of this publication appeared, and it was completed in 1842.
In 1832 he was appointed professor of natural history in the University of Neuchâtel. The fossil fish there soon attracted his attention. The fossil-rich stones furnished by the slates of Glarus and the limestones of Monte Bolca were known at the time, but very little had been accomplished in the way of scientific study of them. Agassiz, as early as 1829, planned the publication of the work which, more than any other, laid the foundation of his worldwide fame. Five volumes of his Recherches sur les poissons fossiles ("Research on Fossil Fish") appeared at intervals from 1833 to 1843. They were magnificently illustrated, chiefly by Joseph Dinkel. In gathering materials for this work Agassiz visited the principal museums in Europe, and meeting Cuvier in Paris, he received much encouragement and assistance from him. They had known him for seven years at the time.
Agassiz found that his palaeontological labors made necessary a new basis of ichthyological classification. The fossils rarely exhibited any traces of the soft tissues of fish. They consisted chiefly of the teeth, scales and fins, even the bones being perfectly preserved in comparatively few instances. He therefore adopted a classification which divided fish into four groups: Ganoids, Placoids, Cycloids and Ctenoids, based on the nature of the scales and other dermal appendages. While Agassiz did much to place the subject on a scientific basis, this classification has been superseded by later work.
As Agassiz's descriptive work proceeded, it became obvious that it would over-tax his resources unless financial assistance could be found. The British Association came to his aid, and the Earl of Ellesmere—then Lord Francis Egerton—gave him yet more efficient help. The 1,290 original drawings made for the work were purchased by the Earl, and presented by him to the Geological Society of London. In 1836 the Wollaston Medal was awarded to Agassiz by the council of that society for his work on fossil ichthyology; and in 1838 he was elected a foreign member of the Royal Society. Meanwhile invertebrate animals engaged his attention. In 1837 he issued the "Prodrome" of a monograph on the recent and fossil Echinodermata, the first part of which appeared in 1838; in 1839–40 he published two quarto volumes on the fossil Echinoderms of Switzerland; and in 1840–45 he issued his Etudes critiques sur les mollusques fossiles ("Critical Studies on Fossil Mollusks").
Before his first visit to England in 1834, the labours of Hugh Miller and other geologists brought to light the remarkable fish of the Old Red Sandstone of the northeast of Scotland. The strange forms of the Pterichthys, the Coccosteus and other genera were then made known to geologists for the first time. They were of intense interest to Agassiz, and formed the subject of a special monograph by him published in 1844–45: Monographie des poissons fossiles du Vieux Gres Rouge, ou Systeme Devonien (Old Red Sandstone) des Iles Britanniques et de Russie ("Monograph on Fossil Fish of the Old Red Sandstone, or Devonian System of the British Isles and of Russia"). In the early stages of his career in Neuchatel, Agassiz also made a name for himself as a man who could run a scientific department well. Under his care, the University of Neuchâtel soon became a leading institution for scientific inquiry.
He was the only person to name a species after Mary Anning during her lifetime. She was a paleontologist who was known around the world for important finds, but because of her gender, usually omitted from formal recognition for her work. In the early 1840s he named two fossil fish species after her—Acrodus anningiae, and Belenostomus anningiae—and another after her friend, Elizabeth Philpot. Agassiz was grateful for the help the women had given him in examining fossil fish specimens during his visit to Lyme Regis in 1834.
In 1837 Agassiz was the first to scientifically propose that the Earth had been subject to a past ice age. In the same year, he was elected a foreign member of the Royal Swedish Academy of Sciences. Prior to this proposal, Goethe, de Saussure, Venetz, Jean de Charpentier, Karl Friedrich Schimper and others had made the glaciers of the Alps the subjects of special study, and Goethe, Charpentier as well as Schimper had even arrived at the conclusion that the erratic blocks of alpine rocks scattered over the slopes and summits of the Jura Mountains had been moved there by glaciers. The question having attracted the attention of Agassiz, he not only discussed it with Charpentier and Schimper and made successive journeys to the alpine regions in company with them, but he had a hut constructed upon one of the Aar Glaciers, which for a time he made his home, in order to investigate the structure and movements of the ice.
These labours resulted, in 1840, in the publication of his work in two volumes entitled Etudes sur les glaciers ("Studies on Glaciers"). In it he discussed the movements of the glaciers, their moraines, their influence in grooving and rounding the rocks over which they travelled, and in producing the striations and roches moutonnees seen in Alpine-style landscapes. He not only accepted Charpentier's and Schimper's idea that some of the alpine glaciers had extended across the wide plains and valleys drained by the Aar and the Rhône, but he went still farther. He concluded that, in the relatively recent past, Switzerland had been another Greenland; that instead of a few glaciers stretching across the areas referred to, one vast sheet of ice, originating in the higher Alps, had extended over the entire valley of northwestern Switzerland until it reached the southern slopes of the Jura, which, though they checked and deflected its further extension, did not prevent the ice from reaching in many places the summit of the range. The publication of this work gave a fresh impetus to the study of glacial phenomena in all parts of the world.
Thus familiarized with the phenomena associated with the movements of recent glaciers, Agassiz was prepared for a discovery which he made in 1840, in conjunction with William Buckland. The two visited the mountains of Scotland together, and found in different locations clear evidence of ancient glacial action. The discovery was announced to the Geological Society of London in successive communications. The mountainous districts of England, Wales, and Ireland were also considered to constitute centres for the dispersion of glacial debris; and Agassiz remarked "that great sheets of ice, resembling those now existing in Greenland, once covered all the countries in which unstratified gravel (boulder drift) is found; that this gravel was in general produced by the trituration of the sheets of ice upon the subjacent surface, etc."
In 1842–1846 he issued his Nomenclator Zoologicus, a classified list, with references, of all names employed in zoology for genera and groups — a work of great labour and research. With the aid of a grant of money from the King of Prussia, Agassiz crossed the Atlantic in the autumn of 1846 with the twin purposes of investigating the natural history and geology of North America and delivering a course of 12 lectures on “The Plan of Creation as shown in the Animal Kingdom,” by invitation from J. A. Lowell, at the Lowell Institute in Boston, Massachusetts. The financial offers presented to him in the United States induced him to settle there, where he remained to the end of his life. He was elected a Foreign Honorary Member of the American Academy of Arts and Sciences in 1846.
His engagement for the Lowell Institute lectures precipitated the establishment of the Lawrence Scientific School at Harvard University in 1847 with him as its head. Harvard appointed him professor of zoology and geology, and he founded the Museum of Comparative Zoology there in 1859 serving as the museum's first director until his death in 1873. During his tenure at Harvard, he was, among many other things, an early student of the effect of the last Ice Age on North America.
He continued his lectures for the Lowell Institute. In succeeding years, he gave series of lectures on “Ichthyology” (1847–48 season), "Comparative Embryology" (1848–49), "Functions of Life in Lower Animals" (1850–51), "Natural History" (1853–54), "Methods of Study in Natural History" (1861–62), "Glaciers and the Ice Period" (1864–65), "Brazil" (1866–67) and "Deep Sea Dredging" (1869–70). In 1850 he married an American college teacher, Elizabeth Cabot Cary, who later wrote introductory books about natural history and, after his death, a lengthy biography of her husband.
Agassiz served as a non-resident lecturer at Cornell University while also being on faculty at Harvard. In 1852 he accepted a medical professorship of comparative anatomy at Charlestown, Massachusetts, but he resigned in two years. From this time his scientific studies dropped off, but he was a profound influence on the American branches of his two fields, teaching decades worth of future prominent scientists, including Alpheus Hyatt, David Starr Jordan, Joel Asaph Allen, Joseph Le Conte, Ernest Ingersoll, William James, Nathaniel Shaler, Samuel Hubbard Scudder, Alpheus Packard, and his son Alexander Emanuel Agassiz, among others. He had a profound impact on paleontologist Charles Doolittle Walcott and natural scientist Edward S. Morse. In return his name appears attached to several species, as well as here and there throughout the American landscape, notably Lake Agassiz, the Pleistocene precursor to Lake Winnipeg and the Red River, and Mount Agassiz, a bastion of the Palisade Crest, the largest glaciated region of California's Sierra Nevada.
During this time he grew in fame even in the public consciousness, becoming one of the best-known scientists in the world. By 1857 he was so well-loved that his friend Henry Wadsworth Longfellow wrote "The fiftieth birthday of Agassiz" in his honor. His own writing continued with four (of a planned ten) volumes of Natural History of the United States which were published from 1857 to 1862. During this time he also published a catalog of papers in his field, Bibliographia Zoologiae et Geologiae, in four volumes between 1848 and 1854.
Stricken by ill health in the 1860s, he resolved to return to the field for relaxation and to resume his studies of Brazilian fish. In April 1865 he led a party to Brazil. Returning home in August 1866, an account of this expedition, entitled A Journey in Brazil, was published in 1868. In December 1871 he made a second eight month excursion, known as the Hassler expedition under the command of Commander Philip Carrigan Johnson (brother of Eastman Johnson), visiting South America on its southern Atlantic and Pacific seaboards. The ship explored the Magellan Strait, which drew the praise of Charles Darwin.
Elizabeth Aggasiz wrote, at the Strait: '.....the Hassler pursued her course, past a seemingly endless panorama of mountains and forests rising into the pale regions of snow and ice, where lay glaciers in which every rift and crevasse, as well as the many cascades flowing down to join the waters beneath, could be counted as she steamed by them.... These were weeks of exquisite delight to Agassiz. The vessel often skirted the shore so closely that its geology could be studied from the deck.'
From his first marriage to Cecilie Bruan, Agassiz had two daughters in addition to son Alexander. In 1863, Agassiz's daughter Ida married Henry Lee Higginson, later to be founder of the Boston Symphony Orchestra and benefactor to Harvard University and other schools. On November 30, 1860, Agassiz's daughter Pauline was married to Quincy Adams Shaw (1825–1908), a wealthy Boston merchant and later benefactor to the Boston Museum of Fine Arts.
In the last years of his life, Agassiz worked to establish a permanent school where zoological science could be pursued amid the living subjects of its study. In 1873, a private philanthropist (John Anderson) gave Agassiz the island of Penikese, in Buzzards Bay, Massachusetts (south of New Bedford), and presented him with $50,000 to permanently endow it as a practical school of natural science, especially devoted to the study of marine zoology. The John Anderson school collapsed soon after Agassiz's death, but is considered a precursor of the Woods Hole Marine Biological Laboratory, which is nearby.
Within his lifetime, Agassiz had developed a reputation for a particularly demanding teaching style. He would allegedly "lock a student up in a room full of turtle-shells, or lobster-shells, or oyster-shells, without a book or a word to help him, and not let him out till he had discovered all the truths which the objects contained." Two of Agassiz's most prominent students detailed their personal experiences under his tutelage, Samuel Hubbard Scudder in a short magazine article for Every Saturday and Nathaniel Southgate Shaler in his Autobiography. These and other recollections were collected and published by Lane Cooper in 1917, which Ezra Pound was to draw on for his anecdote of Agassiz and the sunfish.
Agassiz is remembered today for his theories on ice ages, and for his resistance to Charles Darwin's theories on evolution, which he kept up his entire life. He died in Cambridge, Massachusetts in 1873 and was buried at Mount Auburn Cemetery, joined later by his wife. His monument is a boulder selected from the moraine of the glacier of the Aar near the site of the old Hôtel des Neuchâtelois, not far from the spot where his hut once stood; and the pine-trees that shelter his grave were sent from his old home in Switzerland.
The Cambridge elementary school north of Harvard University was named in his honor and the surrounding neighborhood became known as "Agassiz" as a result. The school's name was changed to the Maria L. Baldwin School on May 21, 2002, due to concerns about Agassiz's racism, and to honor Maria Louise Baldwin the African-American principal of the school who served from 1889 until 1922. The neighborhood, however, continues to be known as Agassiz.
An ancient glacial lake that formed in the Great Lakes region of North America, Lake Agassiz, is named after him, as are Mount Agassiz in California's Palisades, Mount Agassiz, in the Uinta Mountains, Agassiz Peak in Arizona and in his native Switzerland, the Agassizhorn in the Bernese Alps. Agassiz Glacier and Agassiz Creek in Glacier National Park and Mount Agassiz in Bethlehem, New Hampshire in the White Mountains also bear his name. A crater on Mars and a promontorium on the Moon are also named in his honour. A headland situated in Palmer Land, Antarctica is named in his honor, Cape Agassiz. A main-belt asteroid named 2267 Agassiz is also named in association with Louis Agassiz. In addition, several animal species are so named, including Apistogramma agassizi Steindachner, 1875 (Agassiz's dwarf cichlid); Isocapnia agassizi Ricker, 1943 (a stonefly); Publius agassizi (Kaup), 1871 (a passalid beetle); Xylocrius agassizi (LeConte), 1861 (a longhorn beetle); Exoprosopa agassizi Loew, 1869 (a bee fly); and the most well-known, Gopherus agassizii Cooper, 1863 (the desert tortoise).
In 2005 the EGU Division on Cryospheric Sciences established the Louis Agassiz Medal, awarded to individuals in recognition of their outstanding scientific contribution to the study of the cryosphere on Earth or elsewhere in the solar system. He took part in a monthly gathering called the Saturday Club at the Parker House, a meeting of Boston writers and intellectuals. He was therefore mentioned in a stanza of the Oliver Wendell Holmes, Sr. poem, "At the Saturday Club," where the author dreams he sees some of his friends who are no longer:
There, at the table's further end I see
In his old place our Poet's vis-à-vis,
The great PROFESSOR, strong, broad-shouldered, square,
In life's rich noontide, joyous, debonair.
His social hour no leaden care alloys,
His laugh rings loud and mirthful as a boy's,--
That lusty laugh the Puritan forgot,--
What ear has heard it and remembers not?
How often, halting at some wide crevasse
Amid the windings of his Alpine pass,
High up the cliffs, the climbing mountaineer,
Listening the far-off avalanche to hear,
Silent, and leaning on his steel-shod staff,
Has heard that cheery voice, that ringing laugh,
From the rude cabin whose nomadic walls
Creep with the moving glacier as it crawls!
How does vast Nature lead her living train
In ordered sequence through that spacious brain,
As in the primal hour when Adam named
The new-born tribes that young creation claimed!--
How will her realm be darkened, losing thee,
Her darling, whom we call our AGASSIZ!
After Agassiz came to the United States he became a prolific writer the area of polygenism, the idea that races came from separate origins (specifically separate creations), that they could be classified on the basis of specific climatic zones (as animals and plants could generally be), and that they were accordingly endowed with unequal attributes, ideas now included under the rubric of scientific racism.
According to Harvard and University of Colorado historians of science Nadine Weidman and John Jackson, Agassiz was never a supporter of slavery, and claimed his views on polygenism had nothing to do with politics. Agassiz was influenced by philosophical 
Agassiz was a 
In his work he noted similarities of distribution of like species in different geological eras, a phenomenon clearly not the result of migration. Agassiz questioned how fish of the same species live in lakes well separated with no joining waterway, Agassiz concluded they were created at both locations. According to Agassiz the intelligent adaptation of creatures to their environments testified to an intelligent plan. According to historian Paul Blowers, the conclusions of his studies led him to believe that whichever region each animal was found in, was created there “animals are naturally autochthones wherever they are found”; after further research he later extended this idea to humans, which became to be known as his theory of polygenism.
According to Agassiz’s theory of polygenism animals, plants and humans were all created in “special provinces” each having distinct populations of species created in and for that province. Agassiz claimed plants, animals and humans did not originate in pairs but were created in large numbers. According to Agassiz, the different races were created in different provinces, each race was indigenous to the province it was created in, he cited evidence from Egyptian monuments to prove that fixity of racial types had existed for at least five millennia. According to Agassiz’s theory of polygenism all species are fixed, including all the races of humans and species do not evolve into other species. The provinces that the different races were created in included Western American Temperate (the indigenous peoples west of the Rockies), Eastern American Temperate (east of the Rockies), Tropical Asiatic (south of the Himalayas), Temperate Asiatic (east of the Urals and north of the Himalayas), South American Temperate (South America), New Holland (Australia), Arctic (Alaska and Arctic Canada). Cape of Good Hope (South Africa), and American Tropical (Central America and the West Indies).
Agassiz like other polygenists believed the consonantal root referring to redness, so that the name can be interpreted to mean "to show red in the face" or "blusher"; since only light skinned people can blush, then the biblical Adam must be the Caucasian race. Agassiz believed that the writers of the Bible only knew of local events, for example Noah's flood was a local event only known to the regions that were populated by ancient Hebrews, Agassiz claimed the writers of the Bible did not know about any events other than what was going on in their own region and their intermediate neighbors.
Per Blowers, Agassiz also opposed monogenism and evolution, he claimed that the theory of evolution reduced the wisdom of God to an impersonal materialism. Per Blowers, Agassiz held species, by their natures and geographical distribution, to be direct expressions of the intelligence and will of God, not the results of blind chance, and that believed evolution was an insult to the wisdom and will of God. Agassiz’s polygenism theory was accepted by a number of scientists. For example, Nathaniel Shaler studied under Agassiz at Harvard, and was also an adherent to polygenism.
In recent years, critics have cited Agassiz's polygenic theories and argued that his views otherwise tarnish his scientific record, a particular emphasis since the appearance of essays by Morton's observations sprang from racist biases, in Agassiz's case, from his initial revulsion on encountering African-Americans on moving to the United States. However, Gould's essays have received substantial recent criticism for its own limits or bias in research and analysis (e.g., in the Morton case), and other historians parse the historic matters and come to other than Gould's harsh conclusions. Blowers notes that though Agassiz was a proponent of polygenism, he rejected racism and supported the notion of a spiritualized human unity: Agassiz argued that human polygenism did not undermine the spiritual commonality of all people though each race was physically diverse, and that physical descent was irrelevant to the spiritual descent of humanity. Fundamentally, he reports that Agassiz believed God had made all men equal:
Those intellectual and moral qualities which are so eminently developed in civilized society, but which equally exist in the natural dispositions of all human races, constituting the higher unity among men, making them all equal before God.
The accusation of racism has occasionally prompted the renaming of landmarks, schoolhouses, and other institutions which bear the name of Agassiz (which abound in Massachusetts). Opinions on these events are often mixed, given his extensive scientific legacy in other areas. On September 9, 2007 the Swiss government acknowledged the "racist thinking" of Agassiz but declined to rename the Agassizhorn summit.
- "'Recherches sur les poissons fossiles (1833–1843)
- History of the Freshwater Fishes of Central Europe (1839–1842)
- Etudes sur les glaciers (1840)
- Etudes critiques sur les mollusques fossiles (1840–1845)
- Nomenclator Zoologicus (1842–1846)
- Monographie des poissons fossiles du Vieux Gres Rouge, ou Systeme Devonien (Old Red Sandstone) des Iles Britanniques et de Russie (1844–1845)
- Bibliographia Zoologiae et Geologiae (1848)
- (with AA Gould) Principles of Zoology for the use of Schools and Colleges (Boston, 1848)
- Lake Superior: Its Physical Character, Vegetation and Animals, compared with those of other and similar regions (Boston: Gould, Kendall and Lincoln, 1850)
- Contributions to the Natural History of the United States of America (Boston: Little, Brown, and Co., 1857–1862)
- Geological Sketches (Boston: Ticknor & Fields, 1866)
- A Journey in Brazil (1868)
- De l'espèce et de la classification en zoologie [Essay on classification] (Trans. Felix Vogeli. Paris: Bailière, 1869)
- Geological Sketches (Second Series) (Boston: J.R. Osgood, 1876)
- Essay on Classification, by Louis Agassiz (1962, Cambridge)
- Agassiz Rock, Edinburgh : during a visit to Edinburgh in 1840, Aggassiz explained the striations on this rock's surface as due to glaciation.
- List of geologists
- Emling 2009, pp. 169–170
- E.P. Evans: "The Authorship of the Glacial Theory", North American review Volume 145, Issue 368, July 1887. Accessed on February 25, 2008.
- Cameron, Dorothy (1964). Early discoverers XXII, Goethe-Discoverer of the ice age. Journal of glaciology.
- , Neuchâtel 1840. Digital book on WikisourceÉtudes sur les glaciersLouis Agassiz: . Accessed on February 25, 2008.
- Smith, p. 52.
- "Book of Members, 1780–2010: Chapter A". American Academy of Arts and Sciences. Retrieved 6 April 2011.
- Smith (1898), pp. 39–41.
- Smith (1898), pp. 52–66.
- A History of Cornell by Morris Bishop (1962), p. 83.
- Irmscher, Christoph (2013). Louis Agassiz: Creator of American Science. Houghton Mifflin Harcourt.
- Museum of Fine Arts (1918). "Quincy Adams Shaw Collection". Boston, Massachusetts: Museum of Fine Arts. p. 2.
- James, William. "Louis Agassiz, Words Spoken..... at the Reception of the American Society of Naturalists..... [Dec. 30 1896]. Pg 9-10. Cambridge, 1897. Quoted in Cooper 1917, pg 61-2.
- Scudder, Samuel H. "Look at your fish", originally published in Every Saturday, April 4, 1874, 16, 369-370; reprinted in Erlandson, David A. et al. Doing Naturalistic Inquiry: A Guide to Methods, Sage Publications, 1993, pg. 1-4
- Shaler, Nathaniel and Shaler, Sophia Penn Page (1909). The Autobiography of Nathaniel Southgate Shaler with a Supplementary Memoir by his Wife. Boston: Houghton Mifflin Company. pp. 92–99.
- Cooper, Lane (1917). Louis Agassiz as a Teacher: Illustrative Extracts on his Method of Instruction. Ithaca: The Comstock Publishing Company.
- Pound, Ezra (2010). ABC of Reading. New York: New Directions. pp. 17–18.
- Louis Agassiz Elementary School at the Wayback Machine (archived July 24, 2011). cambridgema.gov
- Edward Lurie, "Louis Agassiz and the Races of Man," Isis 45, no. 3 (1954): 227–242.
- John P. Jackson, Nadine M. Weidman "Race, Racism, and science: social impact and interaction, Rutgers University Press, 2005, p. 51
- Paul M. Blowers, 2008, "Entering 'This Sublime And Blessed Amphitheatre': Contemplation of Nature and Interpretation of the Bible in the Patristic Period, In "Nature and Scripture in the Abrahamic Religions: Up to 1700", 2 vols (Scott Mandelbrote & Jitse Meer, Eds.), book DOI: 10.1163/ej.9789004171916.i-782, book ISBN 9789047425236), pp. 147-176, esp. 159-164 and 151-154, chapter DOI: 10.1163/ej.9789004171916.i-782.34, chapter ISBN 9789047425236), see , accessed 8 June 2014.
- "Earthquake impacts on prestige". Stanford University and the 1906 earthquake. Stanford University. Retrieved 22 June 2012.
- Cohen, Nancy, The reconstruction of American liberalism, 1865–1914, UNC Press Books, 2002, p. 77
- Stephen Jay Gould, "Flaws in a Victorian Veil," Chapter 16 in The Panda's Thumb.
- J.E. Lewis, D. DeGusta, M.R. Meyer, J.M. Monge, A.E. Mann& R.L. Holloway (2011) The Mismeasure of Science: Stephen Jay Gould versus Samuel George Morton on Skulls and Bias. PLoS Biol 9(6): e1001071. doi:10.1371/ journal.pbio.1001071, see , accessed 8 June 2014.
- See for instance: Author needed, 2001, "Political Correctness Run Amok: School Students Dishonor a Genius of Science", Journal of Blacks in Higher Education, no. 32 (Summer 2001): 74–75.
- "Louis Agassiz vom Sockel holen und dem Sklaven Renty die Würde zurückgeben". Die Bundesversammlung – Das Schweizer Parlament. 2007-09-14.
- Dexter, R W (1979). "The impact of evolutionary theories on the Salem group of Agassiz zoologists (Morse, Hyatt, Packard, Putnam)". Essex Institute historical collections 115 (3). pp. 144–71.
- Irmscher, Christoph (2013). Louis Agassiz: Creator of American Science. Houghton Mifflin Harcourt.
- Lurie, E (1954). "Louis Agassiz and the races of Man". Isis; an international review devoted to the history of science and its cultural influences 45 (141) (Sep 1954). pp. 227–42.
- Lurie, Edward (1988). Louis Agassiz: A Life in Science. Johns Hopkins University Press.
- Lurie, Edward (2008). "Agassiz, Jean Louis Rodolphe". Complete Dictionary of Scientific Biography 1. Detroit: Charles Scribner's Sons. pp. 72–74.
- Mackie, G O (1989). "Louis Agassiz and the discovery of the coelenterate nervous system". History and philosophy of the life sciences 11 (1). pp. 71–81.
- Menand, Louis (2002). "Agassiz". The Metaphysical Club: A Story of Ideas in America. Macmillan. pp. 97–116.
- Numbers, Ronald L., The Creationists: From Scientific Creationism to Intelligent Design, 2nd ed., 2006.
- Rogers, Molly (2010). Delia's Tears: Race, Science, and Photography in Nineteenth-Century America. Yale University Press.
- Smith, Harriet Knight, The history of the Lowell Institute, Boston: Lamson, Wolffe and Co., 1898.
- Winsor, M P (1979). "Louis Agassiz and the species question". Studies in history of biology 3. pp. 89–138.
- Publications by and about Louis Agassiz in the catalogue Helveticat of the Swiss National Library
- Works by Louis Agassiz at Project Gutenberg
- Works by Louis Agassiz at LibriVox (public domain audiobooks)
- Weisstein, Eric W., Agassiz, Jean (1807–1873) from ScienceWorld.
- Pictures and texts of Excursions et séjours dans les glaciers et les hautes régions des Alpes and of Nouvelles études et expériences sur les glaciers actuels by Louis Agassiz can be found in the database VIATIMAGES.
- "Geographical Distribution of Animals", by Louis Agassiz (1850)
- Runner of the Mountain Tops: The Life of Louis Agassiz, by Mabel Louise Robinson (1939) – free download at manybooks.net
- Thayer Expedition to Brazil, 1865–1866 (Agassiz went to Brazil to find glacial boulders and to refute Darwin. Dom Pedro II gave his support for Agassiz's expedition on the Amazon River.)
- Louis Agassiz at Find a Grave
- Louis Agassiz Correspondence, Houghton Library, Harvard University
- digital version of Volume 3 "RECHERCHES SUR LES POISSONS FOSSILES"
- Illustrations from 'Monographies d'échinodermes vivans et fossiles'
- View works by Louis Agassiz online at the Biodiversity Heritage Library.
- National Academy of Sciences Biographical Memoir