- Email: [email protected]
Companion to the first edition of chemical synonyms and trade names
Sept., i925. ]
BOOK REVIEWS.
40 3
same form as the list on relativity under author's name. The annotations which accompany the various lists and the statistical information on the production of the literature on relativity are of great interest. The author makes no claim that the compilation is free of omissions and bespeaks an appreciation of any communication that may add to the usefulness of this comprehensive collection of 3375 titles. The .generous spirit shown by the author in laying aside enough of his own interest-absorbing investigations to assume the heavy burden of collecting and classifying bibliographic data adds to the welcome which the intrinsic usefulness of his work will enlist. LUCIEN E. PICOLET. COMPANION TO THE FIRST EDITION OF CHEMICAL SYNONYMS AND TRADE
NAMES. By William Gardner. 56 pages, 8vo. London, Crosby Lockwood and Son, 1925. Price, 7s. 6d. Notice has already been given in this JOURNAL of the first edition of Gardner's " Chemical Synonyms." The present issue is a supplement intended to keep the work up to date. The material has been included in a second edition. hut the supplement has been issued for the use of those who have the first. This is a somewhat novel method, but will be appreciated by many. The supplement contains about 2700 titles, and" covers very useful and important lists of trade names and synonyms. The time seems now to be about at hand for the publication of a work on the loose-leaf principle, by which an encyclopedia of chemistry may be kept up to date without the expense of buying every year or so a new edition. HENRY LE,FFMANN. THE CRYSTALLINESTATE. By Sir William Henry Bragg, K.B.E., D.Sc., F.R.S. 31 pages, illustrated, 8vo, paper bound. Oxford University Press, American Branch, New York. Price, 7o cents. This is the report of the Romanes Lecture, delivered May 20, 1925. The author stands most prominent in the research into crystal structure by means of Lane's method and its later expansions. T h e facts are set forth clearly and concisely. To the chemist the most interesting and important data are those in regard to the elucidation of the chain arrangements of the carbon atoms in organic substances. For many years teachers of chemistry have made use of graphic formulas to explain homology, isomerism, optical activity and other properties of organic bodies, but, as the author remarks, cautious teachers have always laid stress on the point that the arrangements were suggestive and not to be taken as actually existing. Sir William, however, in this lecture tells us that the chain and ring arrangements are definitely indicated by the X-ray methods. This will be good news to chemists, who by their very training are inclined to be Gradgrinds, wanting facts and nothing else. In the course of the lecture, a comparison was made between a bar of aluminum of ordinary nature, being a mixture of crystals, and one which by special treatment has been converted into a single crystal. The differences between the physical properties of the two are marked. This contrast is now pretty generally known, one of the most striking instances l)eing the single copper crystals which have been produced in the United States. HENRY LEFFMAN5:.
BOOK REVIEWS.
40 3
same form as the list on relativity under author's name. The annotations which accompany the various lists and the statistical information on the production of the literature on relativity are of great interest. The author makes no claim that the compilation is free of omissions and bespeaks an appreciation of any communication that may add to the usefulness of this comprehensive collection of 3375 titles. The .generous spirit shown by the author in laying aside enough of his own interest-absorbing investigations to assume the heavy burden of collecting and classifying bibliographic data adds to the welcome which the intrinsic usefulness of his work will enlist. LUCIEN E. PICOLET. COMPANION TO THE FIRST EDITION OF CHEMICAL SYNONYMS AND TRADE
NAMES. By William Gardner. 56 pages, 8vo. London, Crosby Lockwood and Son, 1925. Price, 7s. 6d. Notice has already been given in this JOURNAL of the first edition of Gardner's " Chemical Synonyms." The present issue is a supplement intended to keep the work up to date. The material has been included in a second edition. hut the supplement has been issued for the use of those who have the first. This is a somewhat novel method, but will be appreciated by many. The supplement contains about 2700 titles, and" covers very useful and important lists of trade names and synonyms. The time seems now to be about at hand for the publication of a work on the loose-leaf principle, by which an encyclopedia of chemistry may be kept up to date without the expense of buying every year or so a new edition. HENRY LE,FFMANN. THE CRYSTALLINESTATE. By Sir William Henry Bragg, K.B.E., D.Sc., F.R.S. 31 pages, illustrated, 8vo, paper bound. Oxford University Press, American Branch, New York. Price, 7o cents. This is the report of the Romanes Lecture, delivered May 20, 1925. The author stands most prominent in the research into crystal structure by means of Lane's method and its later expansions. T h e facts are set forth clearly and concisely. To the chemist the most interesting and important data are those in regard to the elucidation of the chain arrangements of the carbon atoms in organic substances. For many years teachers of chemistry have made use of graphic formulas to explain homology, isomerism, optical activity and other properties of organic bodies, but, as the author remarks, cautious teachers have always laid stress on the point that the arrangements were suggestive and not to be taken as actually existing. Sir William, however, in this lecture tells us that the chain and ring arrangements are definitely indicated by the X-ray methods. This will be good news to chemists, who by their very training are inclined to be Gradgrinds, wanting facts and nothing else. In the course of the lecture, a comparison was made between a bar of aluminum of ordinary nature, being a mixture of crystals, and one which by special treatment has been converted into a single crystal. The differences between the physical properties of the two are marked. This contrast is now pretty generally known, one of the most striking instances l)eing the single copper crystals which have been produced in the United States. HENRY LEFFMAN5:.