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EXPERIMENTAL SCIENCE SERIES FOR BEGINNERS.

I.

L I G H T:

A SERIES OF

SIMPLE, ENTERTAINING, AND INEXPENSIVE EX-
PERIMENTS IN THE PHENOMENA OF LIGHT,

FOR THE USE OF STUDENTS

OF EVERY AGE.

BY

ALFRED M. MAYER AND CHARLES BARNARD.

NEW YORK:
D. APPLETON AND COMPANY,
549 AND 551 BROADWAY.

1879.

کاراته ))

COPYRIGHT BY
D. APPLETON AND COMPANY,

187.

PREFATORY NOTE.

It is the design of this book to furnish a number of simple and easy experiments in the phenomena of light, that any one can perform with materials that may be found in any dwelling-house, or that may be bought for a small sum in any town or city. By the aid of this book the reader becomes an experimenter. The student of Nature may read in books, and soon forget. The experimenter who questions Nature himself, who constructs his own apparatus, and who performs his own experiments, learns past forgetting. He knows because he has observed.

It is believed that this book will occupy a place hitherto unfilled in scientific literature. It is specially prepared for the boy or girl student, and for the teacher who has no apparatus and who wishes his pupils to become experimenters, strict reasoners, and cxact observers. Nearly all the experiments described are new, and all have been thoroughly tested. The

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PREFATORY NOTE.

materials employed are of the cheapest and most common description, and all the experiments may be performed at an expense of less than fifteen dollars. The apparatus is, at the same time, suitable for regular daily use in both the home and school, and with care should last for years.

The origin of this series of books, and the manner of their production, may be briefly stated. For several years Professor Mayer has been studying how to give to every teacher and scholar the knowledge of the art of experimenting. To accomplish this very desirable object, he had invented the simplest and cheapest apparatus, and he and his scientific friends had been satisfied with their performance. It remained to describe these instruments and the ways of using them. He found, however, that his leisure from professional duties was not sufficient for this work, and, not to delay further the publication of his labors, Professor Mayer called in Mr. Charles Barnard to assist him in preparing the books for the press. The construction and arrangement of the instruments were explained to Mr. Barnard, and the experiments were made before him. Mr. Barnard then wrote out the descriptions, which were revised by Professor Mayer. The engravings have been made under Professor Mayer's special direction, and care has been taken to

render them accurate representations of the apparatus and experiments.

The nature of light is not touched upon in this volume. The authors propose to explain, in another book, the phenomena of interference and polarization of light, and to explain fully the structure of the eye and the nature of vision.

THE AUTHORS.

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