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TEXBER OF THE GEOLOGICAL SOCIETY, AUTHOR OF THE RUDIMENTI
OF CHEMISTRY, AND PROPRIETOR OF THE AQUA-FORTIS WORKS
AND CHEMICAL MANUFACTORY IN GOSWELL-STREET,

LONDON.

THE SIXTH EDITION,

WITH EMENDATIONS AND CONSIDERABLE ADDITIONE,

LONDON:
PRINTED FOR THE AUTHORS AND SOLD BY LACKINGTON, ALLEN, AND CO.,

FINSBURY-SQUARE; J, RICHARDSON, ROYAL EXCHANGE ; J. MURRAY, ALBE-
XARLE-STREET ; s. HIGHLEY, FLE£T-STREET ; J. FARDING, ST. JAMES'S-
STREET ; A. BLACK, EDINBURGH; AND Y, KEENE, DUBLIN.

QD

30 .825.

1814

« Chemical research conducts to the knowledge of philosophical truth, and forms the mind to philosophical enlargement and accuracy of thought, more happily than almost any other species of investigation in which the human intellect can be employed.”

TILLOCH.

" Tout homme qui reçoit une éducation libérale, compte aujourd'hui la chimie parmi les objets les plus indispensables de ses études."

FOURCROY.

Printed by RICHARD and ARTHUR TAYLOR, Shoe-Lane, Londun.

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THE

very flattering reception which “ THE CHEMICAL CATECHISM” has met with from the public, three large impressions having been sold within a very short period, and the respectable character it has received in the reviews and other periodical publications, have encouraged the author to devote a large portion of his time to the correction and enlargement of the work ;-a fourth edition of which he now offers, in a form that he trusts will be approved, and with a confidence that he did not at first allow himself to entertain.

The late highly interesting and truly important discoveries of Davy having thrown. new light

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