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 LESSONS IN HYGIENIC PHYSIOLOGY

By. x + 271 pages. 198 illustrations (16 colored, 13 full-page plates). 60 cents net.

In Lessons in Hygienic Physiology the study of physiology is simplified without weakening the presentation of its three essential principles—the biological principle of environment, the chemical principle of oxidation, and the physical principle of energy. The subject is approached throughout from the standpoint of health, because this is the most useful as well as the most interesting point of view. The question of temperance is treated fully, but at the same time in a conservative manner. The book is fully illustrated, one hundred and ninety-eight figures being furnished, sixteen of which are colored. The Lessons is suited to the needs of teachers who may find the Elements somewhat too advanced for their classes.

ELEMENTS OF PHYSIOLOGY

By. xii + 364 pages. A very full course in Physiology and Hygiene. Profusely illustrated in black and white and in colors. 90 cents net.

This book has an exceptionally large number of illustrations—two hundred and forty-eight, of which eight are full-page colored plates. The need for a compound microscope is largely obviated by sixty microscopic views of cells and tissues. The Elements is provided with a Colored Manikin arranged to show every important organ in its natural position with reference to the organs before it, behind it, and around it. Since every pupil has the manikin while studying each lesson, it is really more serviceable than the manikins usually found in schools. This book contains twenty-five Thought Lessons of about ten questions each, logically developing different lines of thought; also three hundred questions in Applied Physiology.

THE MACMILLAN COMPANY

Sixty-four and Sixty-six Fifth Avenue, New York