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ELECTRO-CHEMICAL

ANALYSIS.

SMITH.

AUTHORIZED TRANSLATIONS.

BY EDGAR F. SMITH, F.C.S,, M.A., PH.D., Professor of Chemistry, University of Pennsylvania ; Member of Chemical Societies

of Berlin and Paris, etc.

I 2mo.

INORGANIC CHEMISTRY. A Text-book for Students. Third

American, from the Fifth German Edition, thoroughly revised, and in many parts rewritten. With 89 Illustrations and a Colored Plate of Spectra.

Cloth, $2.00 THE CHEMISTRY OF THE CARBON COMPOUNDS, or

Organic Chemistry. A Text-book for Students. Translated from the Fourth German Edition. Illustrated.

Cloth, $3.00; Leather, $3.50

Prof. Richter's methods of arrangement and teaching have proved their superiority by the large sale of his books throughout Europe and America, translations having been made in Russia, Holland and Italy. They are now used by many of the most prominent schools and colleges in the United States, by those giving a high technical education, as well as those who aim to give but a groundwork in the science of chemistry; this shows their wonderful adaptiveness to all grades of teaching.

Upon application, a complete descriptive circular, giving recommendations and examination prices, will be sent free.

P. BLAKISTON, SON & CO.,

PUBLISHERS,

1012 WALNUT STREET,

PHILADELPHIA.

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PHILADELPHIA:
P. BLAKISTON, SON & CO.,
1012 WALNUT STREET.

Copyright, 1890, by P. BIAKISTON, Son & Co.

PRESS OF WM. F. FELL & Co.,
1220-24 SANSOM STREET,

PHILADELPHIA.

PREFACE.

In preparing this little volume the author has had constantly in view the needs of a large class of students of analytical chemistry desirous of becoming acquainted with the methods of quantitative analysis by electrolysis; these are daily acquiring greater importance, and being introduced and applied wherever possible.

The larger texts devoted to analysis have omitted electrolysis from their pages, thus rendering its special treatment necessary and desirable.

The plan adopted in the following pages in presenting this subject has been to give a brief introduction upon the behavior of the current toward the different acids and salts, a short description of the various sources of the electric energy; its control and measurement; after which follow a condensed history of the introduction of the current into chemical analysis, and sections relating to the determination and separation of metals, as well as the oxidativns possible by means of the electric agent.

In using this book as a guide, the student is earnestly recommended to perform the determinations of each metal as indicated in the text. The details have

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