Fourteen Weeks in Zoology

A Brief History of the United States

Fourteen Weeks in Chemistry

Fourteen Weeks in Physics

Fourteen Weeks in Descriptive Astronomy

The Story of Rocks: A Fourteen Week's Course in Popular Geology

Fourteen Weeks in Zoology

Fourteen Weeks in Chemistry

Hygienic Physiology: With Special Reference to the Use of Alcoholic Drinks and Narcotics

Fourteen Weeks in Chemistry

Fourteen Weeks in Popular Geology

Fourteen Weeks in Descriptive Astronomy

Popular Physics

New Descriptive Astronomy

Hygienic Physiology with Special Reference to the Use of Alcoholic Drinks and Narcotics

The Chautauqua Course in Physics

Fourteen Weeks in Physics

A Brief History of the United States: For Schools

The Chautauqua Course in Physics

Fourteen Weeks in Zoology