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Free
Jacob Lawson Wortman
On The Affinities of Leptarctus primus of Leidy American Museum of Natural History, Vol. VI, Article VIII, pp. 229-331.
Free
Mabel Osgood Wright, Elliott Coues
Citizen Bird: Scenes from Bird-Life in Plain English for Beginners
Free
John Dee
The Mathematicall Praeface to Elements of Geometrie of Euclid of Megara
Free
Thomas Henry Huxley
Criticisms on "The Origin of Species" From 'The Natural History Review', 1864
Free
Ruth Sawyer Harvey
Drainage Modifications and Glaciation in the Danbury Region Connecticut State of Connecticut State Geological and Natural History Survey Bulletin No. 30
Free
Robert Mearns Yerkes
The Mental Life of Monkeys and Apes: A Study of Ideational Behavior
Free
Sir E. Ray (Edwin Ray) Lankester
More Science From an Easy Chair
Free
Sami Khalaf Hamarneh
History of the Division of Medical Sciences United States National Museum Bulletin 240, Contributions from the Museum of History and Technology, paper 43, 1964
Free
H. H. (Herbert Hall) Turner
Astronomical Discovery
Free
Robert J. Russell
Four New Pocket Gophers of the Genus Cratogeomys from Jalisco, Mexico
Free
Thomas Henry Huxley
On the Method of Zadig Essay #1 from "Science and Hebrew Tradition"
Free
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A New Pocket Gopher (Genus Thomomys) From Wyoming and Colorado
Free
Various
Scientific American Supplement, No. 388, June 9, 1883
Free
Various
Scientific American Supplement, No. 613, October 1, 1887
Free
A. S. (Alpheus Spring) Packard
Lamarck, the Founder of Evolution His Life and Work
Free
Mrs. (Jane Haldimand) Marcet
Conversations on Chemistry, V. 1-2 In Which the Elements of that Science Are Familiarly Explained and Illustrated by Experiments
Free
Robert Record
The Path-Way to Knowledg, Containing the First Principles of Geometrie
Free
John Burroughs
In the Catskills: Selections from the Writings of John Burroughs
Free
Arthur O. (Arthur Owens) Cooke
Wildflowers of the Farm
Free
Charles Darwin
On the Origin of Species by Means of Natural Selection or the Preservation of Favoured Races in the Struggle for Life. (2nd edition)
Free
Mrs. R. Lee
Anecdotes of the Habits and Instinct of Animals
Free
G. F. (George Farrer) Rodwell
Etna: A History of the Mountain and of its Eruptions
Free
Thomas Henry Huxley
The Evolution of Theology: an Anthropological Study Essay #8 from "Science and Hebrew Tradition"
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Sir Bertram Coghill Alan Windle
Science and Morals and Other Essays
Free
Edith M. (Edith Marion) Patch
Bird Stories
Free
Keith R. Kelson, E. Raymond (Eugene Raymond) Hall
Comments on the Taxonomy and Geographic Distribution of Some North American Rabbits
Free
Eduardo Burnay
Elogio Historico do Conde de Ficalho
Free
Sir John William Dawson
The Story of the Earth and Man
Free
Hieronymus David Gaubius
Inaugureele Rede Waarin wordt Aangetoond dat de Scheikunde met recht een plaats verdient onder de Akademische Wetenschappen
Free
Henri Bourdon
De ramp van Valparaiso De Aarde en haar Volken, 1907