The Story of Germ Life By: Herbert W. Conn

The Mind Master By: Arthur J. Burks

Pandemic By: Jesse F. Bone

The Invaders By: Murray Leinster

The Code of Honor, Or, Rules for the Government of Principals and Seconds in Duelling By: John Lyde Wilson

The Naturalist on the River Amazons By: Henry Walter Bates

Fire People By: Ray Cummings

The Best Made Plans By: Everett B. Cole

Essays Towards a Theory of Knowledge By: Alexander Philip

The Natural History of Selborne, Vol. 1 By: Gilbert White

Astronomy of To-day A Popular Introduction in Non-Technical Language By: Cecil Goodrich Julius Dolmage

A Question of Courage By: Jesse F. Bone

Philosophical Transactions of the Royal Society - Vol 1 - 1666 Giving some Accompt of the present Undertakings, Studies, and Labours of the Ingenious in many considerable parts of the World By: Various

Almost A Man By: Mary Wood-Allen

Theologico-Political Treatise — Part 3 By: Benedictus de Spinoza

Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901 By: Gary N. (Gary Nathan) Calkins

Lost in Translation By: Laurence M. Janifer

Bear Trap By: Alan Edward Nourse

Every Girl's Book By: George Frank Butler

The Untouchable By: Stephen A. Kallis

Valerius Terminus; of the interpretation of nature By: Francis Bacon

The Woman Beautiful or, The Art of Beauty Culture By: Helen Follett Jameson

Project Trinity 1945-1946 By: Steve Rohrer

Birds of the Rockies By: Leander S. Keyser

Biographies of Distinguished Scientific Men First Series By: François Arago

Fifty Years of Railway Life in England, Scotland and Ireland By: Joseph Tatlow

First Book in Physiology and Hygiene By: John Harvey Kellogg

It's a Small Solar System By: Allan Howard

The Western World Picturesque Sketches of Nature and Natural History in North and South America By: William Henry Giles Kingston

Weak on Square Roots By: Russell Burton

The Gay Rebellion By: Robert W. Chambers

The Medallic History of the United States of America 1776-1876 By: J. F. (Joseph Florimond) Loubat