Competition By: James Causey

Condition of the Working-Class in England in 1844 By: Friedrich Engels

Conditions of Existence as Affecting the Perpetuation of Living Beings By: Thomas Henry Huxley

Conestoga Wagons in Braddock's Campaign, 1755 By: Donald H. Berkebile

Confessions of a Neurasthenic By: William Taylor Marrs

Confidences Talks With a Young Girl Concerning Herself By: Edith B. Lowry

Conscience By: Eliza Lee Cabot Follen

Consolations in Travel or, the Last Days of a Philosopher By: Humphry Davy

Contamination Crew By: Alan Edward Nourse

Contributions to the Theory of Natural Selection A Series of Essays By: Alfred Russel Wallace

Control Group By: Roger D. Aycock

Conversations on Chemistry, V. 1-2 In Which the Elements of that Science Are Familiarly Explained and Illustrated by Experiments By: Mrs. (Jane Haldimand) Marcet

Coral and Coral Reefs By: Thomas Henry Huxley

Coral Reefs By: Charles Darwin

Cost of Living By: Robert Sheckley

Country Walks of a Naturalist with His Children By: W. (William) Houghton

Creative Chemistry By: Edwin E. Slosson

Creatures of the Night A Book of Wild Life in Western Britain By: Alfred Wellesley Rees

Creatures of Vibration By: Harl Vincent

Crime and Its Causes By: William Douglas Morrison

Criminal Man According to the Classification of Cesare Lombroso By: Gina Lombroso

Criminal Negligence By: J. Francis McComas

Criminal Psychology; a manual for judges, practitioners, and students By: Hans Gustav Adolf Gross

Criminal Sociology By: Enrico Ferri

Criticism on "The origin of species" By: Thomas Henry Huxley

Crossroads of Destiny By: H. Beam Piper

Cry from a Far Planet By: Tom Godwin

Cubs of the Wolf By: Raymond F. Jones

Cully By: Jack Egan

Cum Grano Salis By: Randall Garrett

Cutting It Out How to get on the waterwagon and stay there By: Samuel G. (Samuel George) Blythe

Damned If You Don't By: Randall Garrett