NORTON’S (JOHN P.) ELEMENTS OF SCIENTIFIC AGRICULTURE, 60

OR, THE CONNECTION BETWEEN SCIENCE AND THE ART OF PRACTICAL FARMING.

Prize Essay of the New York State Agricultural Society. By JOHN P.

NORTON, M. A., Professor of Scientific Agriculture in Yale College.

Adapted to the use of Schools.

An overland journey, from New York to San Francisco in the summer of 1859 · 第 87 / 126 题