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Preparation of the Common Acids and Alkalies; XVIII. The Action of Acids and Alkalies upon Litmus. The Formation of Salts; XIX. The Discovery of Fixed Air; XX. The Study of Fire and Air; XXI. The Rusting of Iron; XXII. The Discovery of Oxygen; XXIII. The Action of Acids upon Metals; The Discovery of "Inflammable Air"; XXIV. The Action of Acids on Metals. The Discovery of "Volatile Sulphurous Acid" and of "Nitrous Air"; XXV. The Discovery of the Composition of Water; XXVI. The Properties of Gases. The Densities of Gases; XXVII. The Properties of Gases. Boyle's Law; XXVIII. The Properties of Gases: The Expansion of Gases by Heat; XXIX. The Properties of Gases. The Pressure in a Mixture of Gases; XXX. A Research on Chalk; XXXI. The Composition of Water by Volume and by Weight; XXXII. Acids and Alkalies: Their Combining Proportions; XXXIII. Equivalent Weights of the Metals; XXXIV. The Transformation of Matter. The Law of Definite Proportions. APPENDIX. Laboratory Fittings, Apparatus, and Chemicals.

PRESS OPINIONS

CHEMICAL NEWS.-"This is a gratifying book. The student is trained to re-discover, or, as the case may be, to re-demonstrate for himself, the cardinal factor and laws of chemical science. Hence, instead of as is too generally the case-closing the book with the sad reflection that the contents, how true soever, are a mere rechauffée of what has been many times said before, we are in a position to congratulate the authors and still more their pupils and readers."

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EDUCATIONAL TIMES.—“We welcome this book as containing the best treatment of chemistry as an educational subject that we have yet seen, and one in which all the old traditions of science-cramming are finally thrown to the winds The authors evidently expect a second edition to be called for soon, since they express the intention of including in it 'chapters, which are already in hand, on the Discovery of the Metals, on the Diffusion of Gases, and on Fuel and Food Stuffs.' If the sale of a book were proportional to its merits (alas! for the if) their anticipations should be justified. For the sake of science teaching we trust they may be."

EDUCATIONAL NEWS.-"A most interesting, useful, and valuable contribution to the study of this subject. The book is masterly in treatment and scientific in method. The book is worthy of all praise, and, without reservation, we can thoroughly recommend it to all students of chemistry.'

GUARDIAN.- "This book lays great stress on early quantitative work by all the students themselves. Undoubtedly such work is more easy to secure in University colleges and polytechnics than in the average secondary schools. But wherever the necessary bench ac commodation can be obtained, this is the book which in our judgment is-since the days of Galloway's First and Second Steps in Chemistry—best qualified to stimulate the interest and evolve the mettle of the student."

Now ready. Globe 8vo. Price 2s. 6d.

PRACTICAL

INORGANIC CHEMISTRY

BY

G. S. TURPIN, M.A. (Camb.), D.Sc. (Lond.)

PRINCIPAL OF THE INTERMEDIATE AND TECHNICAL SCHOOL, SWANSEA

Adapted to the Elementary Stage of the South Kensington Syllabus

London

MACMILLAN AND CO., LIMITED

NEW YORK: THE MACMILLAN COMPANY

OPINIONS OF THE PRESS

Manchester Guardian.-"These examples will sufficiently explain the character of Dr. Turpin's book, which is quite distinct from the crowd of elementary text-books of tables and tests which come with such surprising regularity from the press. We may congratulate Dr. Turpin on a most thoughtful attempt to teach beginners the true aims and methods of chemistry."

Speaker-"Its thorough and workmanlike character is sure to recommend this book to the managers of science schools."

Nature-"It encourages thought, creates interest in chemistry, and furnishes the kind of knowledge most likely to prove of advantage in after years. Not only in organized science schools, but in every school where chemistry is taught, the course described in this book could be profitably introduced."

Educational News.-"We have carefully gone through this text-book, and find it in all respects a very desirable text-book. To students who desire a practical knowledge of this subject there can be little doubt it will prove most invaluable. The experiments given are well grouped, the apparatus required is carefully sketched, the methods are clearly shown To all students of inorganic chemistry his book may safely be recommended, but to those who to make themselves proficent in the subject desire practical work, it will be a decided acquisition. In all respects it is a very suitable manual."

...

School Guardian.-"This little work deserves its title of 'Practical.' It is clear and accurate, and is well supplied with useful diagrams. . . It will be found a good and useful introduction to the experimental study of inorganic chemistry."

Now Ready. Second Edition. Globe 8vo. Price 3s. 6d.

PRACTICAL

ORGANIC CHEMISTRY

FOR ADVANCED STUDENTS

BY

JULIUS B. COHEN, PH.D.

LECTURER ON ORGANIC CHEMISTRY, THE YORKSHIRE COLLEGE
LECTURER IN THE VICTORIA UNIVERSITY AND
ASSOCIATE OF THE OWENS COLLEGE

London

MACMILLAN AND CO., LIMITED

NEW YORK: THE MACMILLAN COMPANY

All rights reserved

THE present volume is an enlarged edition of that published in 1887, and has been completely rewritten. The preparations have all been carefully revised, some of the former ones omitted and many new ones introduced. The chief additions are the introductory chapters on organic analysis and molecular weight determinations, and an extension of the appendix.

The book does not aim at being a complete laboratory guide, but is intended to provide a systematic course of practical instruction, illustrating a great variety of reactions and processes with a very moderate outlay in materials and apparatus.

The objection may be raised that the detailed description of processes makes no demand upon a student's resourcefulness or ingenuity. It must be remembered, however, that the manipulative part of organic chemistry is so unfamiliar to the elementary student that he requires minute directions in order to avoid waste of time and material. Until he has acquired considerable practical skill he cannot accomplish the experimental work requisite for research, and repeated failures will be apt to destroy his confidence in himself.

To satisfy, to a legitimate extent, the prejudices of certain examining bodies, who still adhere to the old system of testing a student's know. ledge of practical organic chemistry by means of the qualitative analysis of certain meaningless mixtures, the special tests for some of the more common organic substances have been inserted. At the same time, an attempt has been made at the end of the appendix to systematise the analysis of organic substances on a broader and therefore more rational basis.

The present occasion seems opportune to direct attention to the fact that one of the most familiar, most readily procurable, and most cheaply produced of all organic materials is placed beyond the reach of many students by the heavy duty levied upon it. May I, in the name of teachers of organic chemistry, appeal to the Board of Inland Revenue, on behalf of scientific and technical education, to provide institutions for higher education in science with a limited quantity of pure alcohol free of duty, thereby placing schools of chemistry in this country in the same position as those on the Continent?

In conclusion I desire to thank Dr. J. McCree, who has written the section on Ethyl Tartrate and the use of the Polarimeter, Dr. T. S. Patterson, who has been kind enough to look over the proofs, and Mr. H. D. Dakin, who has given me substantial assistance in the practical work of revision.

J. B. COHEN.

THE YORKSHIRE COLLEGE.

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