Neighbourhood – A Year’s Life in and About an English Village By: Tickner Edwardes

Night The Mountain Fell; The Story Of The Montana-Yellowstone Earthquake By: Edmund Christopherson

Nine Biological Lectures By: Various

No Animal Food and Nutrition and Diet with Vegetable Recipes By: Rupert H. Wheldon

North West Passage -The Gjöa Expedition 1903-1907 (Volume I) By: Roald Amundsen

North West Passage -The Gjöa Expedition 1903-1907 (Volume II) By: Roald Amundsen

Notes of An East Coast Naturalist By: Arthur Henry Patterson

Notes On Democracy By: H. L. Mencken

Null-ABC By: H. Beam Piper

Ocean of Air - Meteorology for Beginners By: Agnes Giberne

Ocean: A General Account Of The Science Of The Sea By: John Murray

On the Parts of Animals By: Aristotle

On the Various Forces of Nature By: Michael Faraday

On War By: Carl von Clausewitz

One Hundred Proofs That the Earth Is Not a Globe By: William Carpenter

Oracles of Nostradamus By: Charles A. Ward

Organic Evolution By: Richard Swann Lull

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

Our Feathered Friends By: Elizabeth Grinnell

Outline of Science, Vol 4 By: J. Arthur Thomson

Passages from the Life of a Philosopher By: Charles Babbage

Philadelphia Negro: A Social Study By: W. E. B. Du Bois

Physics By: Aristotle

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

Police Your Planet By: Lester del Rey

Popular Lectures on Scientific Subjects By: Hermann von Helmholtz

Popular Superstitions, and the Truths Contained Therein By: Herbert Mayo

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

Practical Talks by an Astronomer By: Harold Jacoby

Prehistoric Men By: Robert J. Braidwood

Prejudices, First Series By: H. L. Mencken

Preliminary Report on Neo-Fascist and Hate Groups By: House Un-American Activities Committee