Cluthe's Advice to the Ruptured By: Cluthe Rupture Institute

Code Three By: Rick Raphael

Cogito, Ergo Sum By: John Foster West

Collector's Item By: Robert F. Young

Combat By: Mack Reynolds

Comments on the Taxonomy and Geographic Distribution of Some North American Rabbits By: E. Raymond (Eugene Raymond) Hall

Common Science By: Carleton Washburne

Compatible By: Richard R. Smith

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

Constructive Beekeeping By: Ed Clark

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 Investigation: a Practical Handbook for Magistrates, Police Officers and Lawyers, Volume 1 By: Hans Gross

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

Criminal Negligence By: J. Francis McComas