Darkness and Daylight; or, Lights and Shadows of New York Life By: Lyman Abbott

In the Land of Cave and Cliff Dwellers By: Frederick Schwatka

Faraday As A Discoverer By: John Tyndall

On the Various Forces of Nature By: Michael Faraday

How To Have Bird Neighbors By: S. Louise Patteson

American Bee Journal, Vol. VI. No. 3, Sept 1870 By: Various

Woman Movement By: Ellen Key

Pioneer Work in Opening the Medical Profession to Women By: Elizabeth Blackwell

Romance of Modern Geology By: Edwin Sharpe Grew

Alps, the Danube and the Near East By: Frank G. Carpenter

Titan Of Chasms: The Grand Canyon Of Arizona By: Charles A. Higgins

Two American Slavery Documents By: American and Foreign Anti-Slavery Society

Gringo In Mañana-Land By: Harry La Tourette Foster

Popular Lectures on Scientific Subjects By: Hermann von Helmholtz

Infection and Immunity By: George M. Sternberg

Lasers By: Hal Hellman

American Bee Journal, Vol. VI. No. 5, Nov 1870 By: Various

Society as I Have Found It By: Ward McAllister

Stray Feathers From a Bird Man's Desk By: Austin L. Rand

Our Atomic World: The Story of Atomic Energy By: C. Jackson Craven

Indians in Wisconsin's History By: John M. Douglass

Atom and the Ocean By: E. W. Seabrook Hull

Dead Men Tell Tales By: Harry Rimmer

Astronomy: The Science of the Heavenly Bodies By: David Todd

Aftermath of Slavery By: William A. Sinclair

Trees, Shown to the Children By: C. E. Smith

Little Masterpieces of Science - Mind By: George Iles

Nine Biological Lectures By: Various

Among Cannibals By: Carl Lumholtz

Porto Rico: The Land of the Rich Port By: Joseph B. Seabury

Genetic Studies of Genius, Volume 1: Mental and Physical Traits of a Thousand Gifted Children By: Lewis Terman

Radioisotopes and Life Processes By: Renato Baserga