understanding of its Physiology, or its uses. Enough of the former study has, therefore, been introduced, to enable the pupil to enter intelligently upon the latter.

Familiar language, as far as practicable, has been employed, rather than that of a technical character. With a view, however, to supply what might seem to some a deficiency in this regard, a Pronouncing Glossary has been added, which will enable the inquirer to understand the meaning of many scientific terms not in common use.

In the preparation of the work the writer has carefully examined all the best material at his command, and freely used it; the special object being to have it abreast of the present knowledge on the subjects treated, as far as such is possible in a work so elementary as this. The discussion of disputed points has been avoided, it being manifestly inappropriate in a work of this kind.

Instruction in the rudiments of Physiology in schools does not necessitate the general practice of dissections, or of experiments upon animals. The most important subjects may be illustrated by

drawings, such as are contained in this work. Models, especially those constructed by Auzoux of Paris, dried preparations of the human body, and the organs of the lower animals, may also be used with advantage.

The writer desires to acknowledge his indebtedness to R. M. Wyckoff, M.D., for valuable aid in the preparation of the manuscript for the press; and to R. Cresson Stiles, M.D., a skilful microscopist and physician, for the chapter "On the Use of the Microscope in the Study of Physiology." Mr. Avon C. Burnham, the well-known teacher of gymnastics, furnished the drawing of the parlor gymnasium and the directions for its use.

Brooklyn, N. Y., 1870.

CONTENTS.