Rip Foster in Ride the Gray Planet By: Harold L. Goodwin

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

Robur the Conqueror By: Jules Verne

Rollo's Experiments By: Jacob Abbott

Rollo's Museum By: Jacob Abbott

Rollo's Philosophy. [Air] By: Jacob Abbott

Romance of Modern Astronomy By: Hector Macpherson

Romance of Modern Electricity By: Charles R. Gibson

Romance of Modern Engineering By: Archibald Williams

Romance of Modern Geology By: Edwin Sharpe Grew

Romance of Modern Invention By: Archibald Williams

Romance of Modern Mechanism By: Archibald Williams

Romance of Modern Photography By: Charles R. Gibson

Romance of the Romanoffs By: Joseph Martin McCabe

Runaway By: Joseph Samachson

Rural Hygiene By: Henry N. (Henry Neely) Ogden

Rural Magazine and Literary Evening Fire-Side Vol 1 No 1 By: Various

Rural Problems of Today By: Ernest R. (Ernest Rutherford) Groves

Sabotage in Space By: Carey Rockwell

Safeguarding children: pediatric medical countermeasure research By: Presidential Commission for the Study of Bioethical Iss

Salvage in Space By: Jack Williamson

Sane Sex Life and Sane Sex Living Some Things That All Sane People Ought to Know About Sex Nature and Sex Functioning; Its Place in the Economy of Life, Its Proper Training and Righteous Exercise By: H. W. (Harland William) Long

Sanitary and Social Lectures, etc By: Charles Kingsley

Satellite System By: Horace Brown Fyfe

Save the Girls By: Mason Long

Say "Hello" for Me By: Frank W. Coggins

Science - History of the Universe Vol. 1: Astronomy By: Francis Rolt-Wheeler

Science - History of the Universe Vol. 2: Geology By: Francis Rolt-Wheeler

Science - History of the Universe Vol. 3: Physics & Electricity By: Francis Rolt-Wheeler

Science - History of the Universe Vol. 4: Chemistry By: Francis Rolt-Wheeler

Science - History of the Universe Vol. 5: Biology By: Francis Rolt-Wheeler

Science - History of the Universe Vol. 6: Zoology & Botany By: Francis Rolt-Wheeler

Science - History of the Universe Vol. 7: Anthropology & Medicine By: Francis Rolt-Wheeler

Science - History of the Universe Vol. 8: Mathematics By: Francis Rolt-Wheeler

Science and Morals and Other Essays By: Bertram Coghill Alan Windle

Science in Short Chapters By: W. Mattieu Williams

Scouting For Girls, Official Handbook of the Girl Scouts By: Girl Scouts of the United States of America

Scrimshaw By: Murray Leinster

Sea Stories for Wonder Eyes By: Mary Earle Hardy

Searchlights on Health: Light on Dark Corners A Complete Sexual Science and a Guide to Purity and Physical Manhood, Advice To Maiden, Wife, And Mother, Love, Courtship, And Marriage By: B. G. (Benjamin Grant) Jefferis

Second Landing By: Floyd L. Wallace

Second Shetland Truck System Report By: William Guthrie

Second Sight By: Alan Edward Nourse

Second Sight By: Basil Wells

Second Treatise of Government By: John Locke

Secret Band of Brothers A Full and True Exposition of All the Various Crimes By: J. H. (Jonathan Harrington) Green

Secret of Everyday Things By: Jean-Henri Fabre

Secret Societies And Subversive Movements By: Nesta Helen Webster

Secrets of the Woods By: William Joseph Long

Security By: Ernest M. Kenyon

See? By: Edward G. Robles

Seed Dispersal By: William J. Beal

Seed-Babies By: Margaret Warner Morley

Seeking a Human Spaceflight Program Worthy of a Great Nation By: Review of U.S. Human Space Flight Plans Committee

Select Temperance Tracts By: American Tract Society

Selection of 19th Century Scientific Verse By: Various

Self Mastery Through Conscious Autosuggestion By: Emile Coué

Sense from Thought Divide By: Mark Clifton

Service with a Smile By: Charles Louis Fontenay

Seventeen Species of Bats Recorded from Barro Colorado Island, Panama Canal Zone By: William B. Jackson

Sex--The Unknown Quantity The Spiritual Function of Sex By: Alexander J. (Alexander James) McIvor-Tyndall

Sexes in Science and History By: Eliza Burt Gamble

She Stands Accused By: Victor MacClure

Shepherd of the Planets By: Alan Mattox

Shipwreck in the Sky By: Eando Binder

Shock Absorber By: E. G. von Wald

Short Discourse Concerning Pestilential Contagion, and the Methods to Be Used to Prevent It By: Richard Mead

Show Business By: Boyd Ellanby

Side-Lights on Astronomy and Kindred Fields of Popular Science By: Simon Newcomb

Sidelights on Relativity By: Albert Einstein

Sight Gag By: Laurence M. Janifer

Silent Sentinels: Protective Relays for A-C and D-C Systems By: Westinghouse Electric and Manufacturing Company

Sir Jagadis Chunder Bose His Life and Speeches By: Jagadis Chandra Bose

Sir William Herschel: His Life and Works By: Edward Singleton Holden

Six Lectures on Light Delivered In The United States In 1872-1873 By: John Tyndall

Six Months In Mexico By: Nellie Bly

Sjambak By: Jack Vance

Sketches of Imposture, Deception, and Credulity By: Richard Alfred Davenport

Sketches of the Natural History of Ceylon By: James Emerson Tennent

Skylark Three By: E. E. Smith

Slavery: What it was, what it has done, what it intends to do Speech of Hon. Cydnor B. Tompkins, of Ohio By: Cydnor Bailey Tompkins

Slaves of Mercury By: Nathan Schachner

Sleeping Sickness By: Fleming Mant Sandwith

Slingshot By: Irving W. Lande

Small World By: William F. Nolan

Smithsonian Institution - United States National Museum - Bulletin 240 Contributions From the Museum of History and Technology Papers 34-44 on Science and Technology By: Various

Social Life in England 1750-1850 By: F. J. Foakes-Jackson

Social Life in the Insect World By: Jean-Henri Fabre

Social Rights and Duties, Volume I (of 2) Addresses to Ethical Societies By: Leslie Stephen

Social Settlement Movement in Chicago By: Josephine Hunt Raymond

Society as I Have Found It By: Ward McAllister

Solar Stiff By: Chas. A. Stopher

Solomon's Orbit By: William Carroll

Some Personal Recollections of Dr. Janeway By: James Bayard Clark

Some Spring Days in Iowa By: Frederick John Lazell

Some Summer Days in Iowa By: Frederick John Lazell

Song in a Minor Key By: Catherine L. Moore

Song of the Cardinal By: Gene Stratton-Porter

Sonny By: Rick Raphael

Sorry: Wrong Dimension By: Ross Rocklynne