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ANALYSIS OF MILK AND MILK PRODUCTS

LEFFMANN AND BEAM.

FOR SANITARY AND TECHNICAL PURPOSES.

BY HENRY LEFFMANN.

Third Edition. 12mo. 154 pages. Illustrated. $1.25.

A COMPEND OF CHEMISTRY,

INORGANIC AND ORGANIC, INCLUDING URINARY ANALYSIS.

BY HENRY LEFFMANN.

ESPECIALLY ADAPTED TO STUDENTS IN MEDICINE AND DENTISTRY.

Fourth Edition. Revised.

Price $0.80. Interleaved for taking Notes, $1.25.

SANITARY RELATIONS OF THE COAL-TAR COLORS.

BY THEODORE WEYL.

AUTHORIZED TRANSLATION BY HENRY LEFFMANN.

12mo. 154 pages. $1.25.

PROGRESSIVE EXERCISES IN PRACTICAL CHEMISTRY.

A LABORATORY HANDBOOK.

BY HENRY LEFFMANN.

Illustrated. Second Edition. 12mo. Cloth, $1.00.

P. BLAKISTON, SON & CO.

[blocks in formation]

SECOND EDITION, REVISED AND ENLARGED,
WITH ILLUSTRATIONS.

PHILADELPHIA :

LANE

MEDICAL LIBRARY

14443
SAN FRANCISCO

P. BLAKISTON, SON & CO.,

1012 WALNUT STREET.

1896.

Copyright, 1896, by P. BLAKISTON, Son & Co.

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

PHILADELPHIA,

1602.2 L49

1896

PREFACE.

The first edition of this book was quite favorably received by competent critics, but it was noted that the analysis of butter and cheese was too briefly treated. It is hoped that this objection has been removed in the present edition. A large amount of matter has been added concerning those topics; all the processes of analysis which have practical value in detecting butter adulteration have been given in detail, many from the latest publication of the A. O. A. C. A large addition has been made to the Chapter on Cheese, and a brief note on the fermented milk beverages. Other features have not been neglected. Considerable matter has been added in relation to the determination of lactose, among which may be mentioned Wiley and Ewell's recently described process of double dilution and polarization, and Allen's manipulation of Pavy's solution. The tables for determining total solids by Hehner and Richmond's formula have been recalculated according to Richmond's corrected formula.

Concerning the rapid method of fat-extraction with which our names are connected, we desire to say that the taking out of a patent was rendered necessary by some business arrangements over which we had no control and which, at that time, seemed to require such action to protect a reputable merchant from serious loss. The amount

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