Open Library
Science
The universe explained, imperfectly.

Prolegomena
Immanuel Kant

Geography
Harm J. de Blij

Environmental science
G. Tyler Miller

The Dragons of Eden
Carl Sagan

Das Finanzkapital
Rudolf Hilferding

Ideen zu einer reinen Phänomenologie und phänomenologischen Philosophie
Edmund Husserl

Far away and long ago
W. H. Hudson

Handbook of Flowering
Abraham H. Halevy

The Evolution of Man
Ernst Haeckel

Progress in Optics
Emil Wolf

Solid State Physics
Frederick Seitz

Horizons
Michael A. Seeds

Handbook of learning and cognitive processes
William K. Estes

Handbook of nature-study for teachers and parents
Anna Botsford Comstock

An Examination of Sir William Hamilton's Philosophy
John Stuart Mill
Federal research
United States. General Accounting Office

Nutrition
Frances Sizer Webb

Microbiology
John Wade Foster

Herrn Eugen Dührings Umwälzung der Wissenschaft
Friedrich Engels

Out of my later years
Albert Einstein