In Search of the Unknown By: Robert W. Chambers

Weak on Square Roots By: Russell Burton

On the Relations of Man to the Lower Animals By: Thomas Henry Huxley

Jerome Cardan A Biographical Study By: W. G. (William George) Waters

The Helpful Hand of God By: Tom Godwin

Food Guide for War Service at Home By: Frances Swain

The Great Dome on Mercury By: Arthur Leo Zagat

The Leader By: Murray Leinster

Honeymoon in Space By: George Griffith

The Big Bounce By: Walter S. Tevis

The Mississippi Saucer By: Frank Belknap Long

Final Weapon By: Everett B. Cole

Self Mastery Through Conscious Autosuggestion By: Emile Coué

Adaptation By: Mack Reynolds

The Open Air By: Richard Jefferies

Flowers and Flower-Gardens With an Appendix of Practical Instructions and Useful Information Respecting the Anglo-Indian Flower-Garden By: David Lester Richardson

The Star Hyacinths By: James H. Schmitz

Alcohol: A Dangerous and Unnecessary Medicine, How and Why What Medical Writers Say By: Martha Meir Allen

Drug Supplies in the American Revolution By: George B. Griffenhagen

Warning from the Stars By: Ron Cocking

The Other Likeness By: James H. Schmitz

Wild Animals at Home By: Ernest Thompson Seton

No Moving Parts By: Murray F. Yaco

The Fourth "R" By: George O. Smith

A Matter of Importance By: Murray Leinster

Fifty Per Cent Prophet By: Randall Garrett

Obed Hussey Who, of All Inventors, Made Bread Cheap By: Follett L. (Follett Lamberton) Greeno

The Good Neighbors By: Edgar Pangborn

The Postage Stamp in War By: Frederick John Melville

The Chemistry, Properties and Tests of Precious Stones By: John Mastin

The Hills of Home By: Alfred Coppel

Martians Never Die By: Lucius Daniel

Yeast By: Thomas Henry Huxley

The Stamps of Canada By: Bertram W. H. (Bertram William Henry) Poole

Vigorish By: John Berryman

When the Sleepers Woke By: Arthur Leo Zagat

Games By: Katherine MacLean

Wandl the Invader By: Ray Cummings

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

Combat By: Mack Reynolds

The Botanical Magazine, Vol. 6 Or, Flower-Garden Displayed By: William Curtis

Equation of Doom By: Gerald Vance

Rip Foster Rides the Gray Planet By: Harold L. Goodwin

Song in a Minor Key By: Catherine L. Moore

Status Quo By: Dallas McCord Reynolds

London's Underworld By: Thomas Holmes

Physics and Politics, or, Thoughts on the application of the principles of "natural selection" and "inheritance" to political society By: Walter Bagehot

Indirection By: Everett B. Cole

The Common Man By: Mack Reynolds

Code Three By: Rick Raphael

Herself Talks with Women Concerning Themselves By: Edith B. Lowry

Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 By: Alexander von Humboldt

An Ounce of Cure By: Alan Edward Nourse

The Man Who Hated Mars By: Randall Garrett

The Evolution of Modern Capitalism A Study of Machine Production By: John A. Hobson

Service with a Smile By: Charles Louis Fontenay

History of the Division of Medical Sciences United States National Museum Bulletin 240, Contributions from the Museum of History and Technology, paper 43, 1964 By: Sami Khalaf Hamarneh

Lords of the Stratosphere By: Arthur J. Burks

The Big Fix By: George O. Smith

Crime and Its Causes By: William Douglas Morrison