2.5

FOR THE USE OF SCHOOLS AND FAMILIES.

BY

WORTHINGTON HOOKER, M.D.,

PROFESSOR OF THE THEORY AND PRACTICE OF MEDICINE IN YALE COLLEGE,
AUTHOR OF HUMAN PHYSIOLOGY," "CHILD'S BOOK OF NATURE,"

66

ETC., ETC.

Illustrated by nearly 300 Engravings.

NEW YORK:

HARPER & BROTHERS, PUBLISHERS,

FRANKLIN SQUARE.

BY DR. WORTHINGTON HOOKER.

THE CHILD'S BOOK OF NATURE. For the Use of Families and Schools; intended to aid Mothers and Teachers in training Children in the Observation of Nature. In Three Parts. Illustrated by Engravings. The Three Parts complete in one volume. Small 4to, Cloth, $1 00; Separately, Cloth, Part I., 40 cents; Parts II, and III., 44 cents each.

PART I. PLANTS.

PART II. ANIMALS.

PART III. AIR, WATER, HEAT, LIGHT, &c.

FIRST BOOK IN CHEMISTRY. For the Use of Schools and Families. Illustrated by Engravings. Revised Edition. Square 4to, Cloth, 44 cents.

NATURAL HISTORY. For the Use of Schools and Families. Illustrated by nearly 300 Engravings. 12mo, Cloth, 90 cents.

SCIENCE FOR THE SCHOOL AND FAMILY.

PART I. NATURAL PHILOSOPHY. Illustrated by numerous Engrav-
ings. Second Edition, Revised and Enlarged. 12mo, Cloth, 90 cents.
PART II. CHEMISTRY. Illustrated by numerous Engravings. Second
Edition, Revised and Enlarged. 12mo, Cloth, 90 cents.

PART III. MINERALOGY AND GEOLOGY. Illustrated by numerous
Engravings. 12mo, Cloth, 90 cents.

Published by HARPER & BROTHERS, Franklin Square, N. Y.

Any of the above works sent by mail, postage prepaid, to any part of the
United States upon receipt of the price.

Entered, according to Act of Congress, in the year one thousand eight hundred and sixty, by HARPER & BROTHERS, in the Clerk's Office of the District Court of the Southern District of New York.

PREFACE.

THERE are many good books on Zoology, or Natural History, as it is commonly termed; but none are properly adapted to instruction in schools. Some of them are too popular in their character, and some, on the other hand, are too scientific, or, rather, contain too many of the details of science; while in all there is too much matter, so that the pupil is confused with the multitude of things brought to view, and therefore obtains definite ideas of but few of them. I have aimed in this book to avoid these defects. My object has been to cull out from the immense mass of material which Zoology presents that which every well-informed person ought to know, excluding all which is of interest and value only to those who intend to be thorough zoologists.

It seems to have been forgotten by most writers of text-books on the natural sciences that a book for common study should be very different from a book for reference. Their books are therefore cumbered with much that is not of any use to the great body of pupils. The true plan for instruction in schools requires that, while the class-book should contain, clearly stated, only that which all ought to know, the teacher should have some works on the subject of a more extended character, to which he can refer whenever occasion calls for it.