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NATURAL PHILOSOPHY:

EMBRACING

THE MOST RECENT DISCOVERIES

IN TUIE

VARIOUS BRANCHES OF PHYSICS,

AND LXIIIBITING

THE APPLICATION OF SCIENTIFIC PRINCIPLES IN EVERY-DAY LIFE.

ADAPTED TO USE WITH OR WITHOUT APPARATUS, AND ACCOMPANIED WITII
FULL DESCRIPTIONS OF EXPERIMENTS, PRACTICAL EXERCISES,

AND NUMEROUS ILLUSTRATIONS.

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BY G. P. QUACKENBOS, A.M.,
PRINCIPAL OF "THE COLLEGIATE SCHOOL", N. Y.; AUTHOR OF FIRST LESSONS IN
COMPOSITION", ADVANCED COURSE OF COMPOSITION AND RIIETOPIC"

ILLUSTRATED SCHOOL HISTORY OF THE UNITED STATES ", ETC.

NEW YORK:
D. APPLETON AND COMPANY,

346 & 348 BROADWAY.

MDCCC LX.

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ALSO BY THE SAME AUTHOR,

First Lessons in Composition, IN WHICH THE PRINCIPLES OF THE ART ARE DEVELOPED IN CONNECTION WITH THE

PRINCIPLES OF GRAMMAR: EMBRACING FULL DIRECTIONS ON THE SUBJECT or PunctuATION : WITH COPIOUS EXERCISES. 12mo. pp. 170. 50 cts.

Advanced Course of Composition and Rhetoric:
A SERIES OF PRACTICAL LESSONS ON THE ORIGIN, HISTORY, AND PECULIARITIES

OF THE ENGLISH LANGUAGE, PUNCTUATION, TASTE, THE PLEASURES OF THE
IMAGINATION, FIGURES, STYLE AND ITS ESSENTIAL PROPERTIES, CRITICISM,
AND THE VARIOUS DEPARTMENTS OF PROSE AND POETICAL COMPOSITION :
ILLUSTRATED WITH COPIOUS EXERCISES. 12mo. pp. 451. $1.

Illustrated School History of the United States,

FROM THE EARLIEST DISCOVERIES TO THE PRESENT TIME: EMBRACING A FULL

ACCOUNT OF THE ABORIGINES; BIOGRAPHICAL NOTICES OF DISTINGUISHED
MEN ; NUMEROUS Maps, PlanS OF BATTLE-FIELDS, AND PICTORIAL ILLUS-
TRATIONS. 12mo. pp. 473. $1.

Entered according to Act of Congress, in the year 1859, by

G. P QUACKENBOS, In the Clerk's Office of the District Court of the United States for the Southern

District of New York.

Classes,

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REFACE./863

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The importance of the physical sciences is now so generally admitted that there are few institutions of learning in which they are not made regular 'branches of study. And very properly:--for what can be more interesting and instructive, what more worthy of the attention of intelligent creatures, what more calculated to inspire their minds with a thirst for further knowledge, and fill their hearts with reverent gratitude to the Divine Being, than an acquaintance with the laws of the material world, the mysterious influences constantly at work in nature, and the principles by which atoms and worlds are alike controlled ?

It is in the hope of investing this subject with a lively interest, and bringing it home to the student by exhibiting the application of scientific principles in every-day lise, that the Natural Philosophy

here presented to the public has been prepared. The author has no sought to render a subject, abstruse in some of its connections, easy

of comprehension, by treating it in a clear style, taking its principles one at a time in their natural order, and illustrating them sully with the facts of our daily experience. The range of topics is comprehensive. By avoiding unnecessary repetitions, room has been found for chapters on Astronomy and Meteorology; one of which subjects, at least, has heretofore been invariably omitted in similar treatises, though a summary of both is important, as time is seldom found for pursuing these branches in separate volumes.

The incorrectness of many of the text-books on Natural Philosophy has been a subject of general complaint. Grave errors, both of theory and fact, have been handed down from one to another, and the results obtained by modern research have been too often over

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