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THE

CHEMICAL NEWS

AND

JOURNAL OF PHYSICAL SCIENCE.

(WITH WHICH IS INCORPORATED THE "CHEMICAL GAZETTE.")

I Journal of Practical Chemistry

IN ALL ITS APPLICATIONS TO

PHARMACY, ARTS, AND MANUFACTURES.

EDITED BY

WILLIAM CROOKES, F.R.S., &c.

VOLUME XIX,-1869.

LONDON:
HENRY GILLMAN, BOY COURT, LUDGATE HILL, E.C.

AND SOLD BY ALL BOOKSELLERS.

MDCCCLXIX.

LONDON:

PRINTED BY WILLIAM CROOKES, CHEMICAL NEWS OFFICE,

boY COURT, LUDGATS HILL, E.c.

PRE FACE.

This volume terminates with the five hundredth number of the “ CHEMICAL News, " and we may, perhaps, at this juncture, not unfitly say a word or two concerning our enterprise.

The reader cannot fail to have observed that we have recently made several important improvements in the “CHEMICAL News.” We have striven to make it not only a chemical newspaper, but a STANDARD WORK OF REFERENCE. Besides the original and critical papers proper to a journal, we are now giving, under the head of “Chemical Notices from Foreign Sources,” the titles of all the contemporary chemical papers published throughout the world, and abstracts of the more important of them. Moreover, the Index has been very carefully compiled, and made much more copious and available for ready reference. We may fairly state that the two half-yearly volumes of the “CHEMICAL News” represent essentially, in extent of material and facility of reference, the Jahresberichte der Chemie ; and, in fact, we may claim for the “CHEMICAL News” that its annual issue is a handy Yearbook of Chemical Science.

It is a matter of gratification to the Editor to find that the “ CHEMICAL NEWS ” has attained so large a circulation in America. There it is re-printed in monthly numbers, to which is added a supplement to chronicle any scientific matters pertaining specially to America. Our circulation, including that of the American reprint, has risen to about 10,000 copies of each issue. This fact we are constrained to note, since, in the majority of instances, the only rewards the man of science can ever secure are the appreciation of his labours by fellow-workers and the consciousness of having served mankind.

For more than a quarter of a century the “ CHEMICAL NEWS” (with its predecessor, the Chemical Gazette), has faithfully recorded the progress of Chemistry and cognate sciences at home and abroad ; so, in the future, our constant anxiety will be exercised to render it a still worthier representative of Chemical Science.

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