Mackintosh's Dissertation On The Progress Of Ethical Philosophy

WITH A PREFACE BY THE REV WILLIAM WHEWELL, M

A. In one neat 8vo. vol., extra cloth.

OVERLAND JOURNEY ROUND THE WORLD,

DURING THE YEARS 1841 AND 1842, BY SIR GEORGE SIMPSON,

GOVERNOR-IN-CHIEF OF THE HUDSON's BAY COMPANY's TERRITORIES.

In one very neat crown octavo volume, rich extra crimson cloth, or in two parts, paper, price 75 cents each.

"A more valuable or instructive work, or one more full of perilous adventure and heroic enter prise, we have never met with." - John Bull.

"It abounds with details of flic deepest interest, possesses all the charms of an exciting romanc* and furnishes an immense mass of valuable information." - Inquirer.

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Popular Science

PHILOSOPHY IN SPORT, MADE SCIENCE IN EARNEST,

BEING AN ATTEMPT TO ILLUSTRATE THE FIRST PRIN

CIPLES OF NATURAL PHILOSOPHY, BY THE

AID OF THE POPULAR TOYS AND

SPORTS OF YOUTH.

FROM THE SIXTH AND GREATLY IMPROVED LONDON EDITION.

In one very neat royal 18mo. volume, with nearly one hundred illustrations on wood.

Fine extra crimson cloth.

"Messrs. Lea k Blanchard have issued, in a beautiful manner, a handsome book, called ' Philosophy in Sport, made Science in Earnest.' This is an admirable attempt to illustrate the first principles of Natural Philosophy, by the aid of the popular toys and sports of youth. Useful information is conveyed in an easy, graceful, yet distorted manner, and rendered easy to the simplest under-standing. The book is an admirable one, and must meet with universal favour." - N. Y. Evening Mirror.

Endless Amusement

JUST ISSUED.

ENDLESS AMUSEMENT,

A COLLECTION OF

NEARLY FOUR HUNDRED ENTERTAINING EXPERIMENTS IN VARIOUS BRANCHES OF SCIENCE,

INCLUDING

ACOUSTICS

ARITHMETIC, CHEMISTRY, ELECTRICITY, HYDRAULICS, HYDROSTATICS,

MAGNETISM, MECHANICS, OPTICS, WONDERS OF THE AIR PUMP, ALL THE

POPULAR TRICKS AND CHANGES OF THE CARDS, etc., etc.

To WHICH IS added,

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OR THE ART OF MAKING FIRE-WORKS:

THE WHOLE SO CLEARLY EXPLAINED AS TO BE WITHIN REACH

OF THE MOST LIMITED CAPACITY.

WITH ILLUSTRATIONS.

FROM THE SEVENTH LONDON EDITION.

In one neat royal 18mo. volume, fine extra crimson cloth.

This work has long supplied instructive amusement to the risins fenerations in England, and will doubtless be hailed with pleasure by those of this country who like (and what boy does not) the marvellous tricks and changes, experiments and wonders afforded by the magic of science and jugglery.

Chemistry Of The Four Seasons, Spring, Summer, Autumn, And Winter

AN ESSAY, PRINCIPALLY CONCERNING NATURAL PHENOMENA, ADMITTING OF

INTERPRETATION BY CHEMICAL SCIENCE, AND ILLUSTRATING

PASSAGES OF SCRIPTURE.

BY THOMAS GRIFFITHS,

PROFESSOR OF CHF

MISTRY IN THE MEDICAL COLLEGE OF ST. BARTHOLOMEWS HOSPIlTAL, ETC.

In one large royal 12mo. volume, with many Wood-Cuts, extra cloth.

* Chemistry is assuredly one of the most useful and interesting of the natural sciences. Chemical Changes meet us at every step, and during every season, the winds and the rain, the heat and the frosts, each have their peculiar and appropriate phenomena. And those who have hitherto remained insensible to these changes and unmoved amid such remarkable, and often startling results, will lose their apathy upon reading the Chemistry of the ' Tour Seasons. and be prepared to enjoy the higest intellectual pleasures. Conceived in a happy spirit, and written with taste and of Mr. Griffiths causal fail to receive the admiration of cultivated minds; and those who have looked lea carefully into nature's beauties, will find themselves led on step by ste, until they realize a new intellectual beings. Such works, we beliheve, exert a nappy influence over society, and hence we hope that the present cue may be extensively road." - The Western Lancet

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