In the Control Tower By: Will Mohler

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

In the Orbit of Saturn By: Roman Frederick Starzl

In the Sargasso Sea A Novel By: Thomas A. Janvier

In the Year 2889 By: Michel Verne

In Times Like These By: Nellie McClung

Indian To-day By: Charles Alexander Eastman

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

Indirection By: Everett B. Cole

Infection and Immunity By: George M. Sternberg

Infinite Intruder By: Alan Edward Nourse

Inquiries into Human Faculty and its Development By: Sir Francis Galton

Inquiry into the Effects of Ardent Spirits upon the Human Body and Mind, with an Account of the Means of Preventing, and of the Remedies for Curing Them By: Dr. Benjamin Rush

Insect Adventures By: Jean-Henri Fabre

Insect Stories By: Vernon Kellogg

Insectivorous Plants By: Charles Darwin

Insects and Diseases A Popular Account of the Way in Which Insects may Spread or Cause some of our Common Diseases By: Rennie Wilbur Doane

Inside John Barth By: William W. Stuart

Instinct By: George O. Smith

Instruction for Using a Slide Rule By: W. Stanley

International Conference Held at Washington for the Purpose of Fixing a Prime Meridian and a Universal Day. October, 1884. Protocols of the Proceedings By: D.C.) International Meridian Conference

Intestinal Ills Chronic Constipation, Indigestion, Autogenetic Poisons, Diarrhea, Piles, Etc. Also Auto-Infection, Auto-Intoxication, Anemia, Emaciation, Etc. Due to Proctitis and Colitis By: Alcinous B. (Alcinous Burton) Jamison

Introduction to the History of Science By: Walter Libby

Invaders from the Infinite By: John Wood Campbell. Jr.

Invasion By: Murray Leinster

Irresistible Weapon By: Horace Brown Fyfe

Islands of Space By: John Wood Campbell. Jr.

It's a Small Solar System By: Allan Howard

It's All Yours By: Sam Merwin

James Cutbush An American Chemist, 1788-1823 By: Edgar Fahs Smith

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

Jim Crow Car; Or, Denouncement of Injustice Meted Out to the Black Race By: John Clay Coleman