554: Scientific Intelligence. 



3. The Elements of Metallography; by Dr. Rudolf Rurer. 

 Translated by C. H. Mathewson. 8vo, pp. 342. New York, 

 1909 (John Wiley & Sons).— Nearly the whole of this book is 

 devoted to a very clear and full explanation of the recently 

 developed methods for studying alloys. The theory of the fusion 

 diagrams and the microscopic structure of these substances is 

 discussed in an admirably simple and thorough manner. A com- 

 paratively short second part of the book deals with practical 

 thermal and structural investigations. The translator has shown 

 excellent skill in putting the work into English. The subject is 

 of great importance both from practical and scientific points of 

 view, and this book will doubtless afford much pleasure and profit 

 to chemists and physicists, even though they may not be directly 

 interested in the subject of alloys. h. l. w. 



4. Outlines of Chemistry with Practical Work ; by H. J. H. 

 Fenton. 8vo, pp. 364. Cambridge, England, 1909, at the Uni- 

 versity Press (New York, G. P. Putnam's Sons). — This book 

 has been prepared for use in connection with the author's course 

 of instruction in general and physical chemistry at Cambridge 

 University. It gives a somewhat condensed, but advanced, 

 treatment of theoretical chemistry, with practical experiments 

 for the student, usually at the end of each discussion of a lecture 

 topic. It appears that the student is expected here to learn the 

 theory and then, if possible, to study the facts which prove it. 

 The book is interesting and it should prove useful to American 

 teachers. The work does not cover the whole domain of chemi- 

 cal theory, but it is to be followed by a second volume. 



h. l. w. 



5. An Elementary Treatise on Qualitative Chemical Analysis, 

 by J. F. Sellers. 12mo, pp. 176. Boston (Ginn & Company). 



A Manual of Qualitative Chemical Analysis ; by J. F. Mo 

 Gregory. 8vo, pp. 135. Boston (Ginn & Company). 



These two text-books on qualitative analysis have just appeared 

 in the form of revised editions, which is an indication that they 

 have been extensively used. Both books follow practically the 

 conventional course of analysis, and differ chiefly in the manner 

 in which it is presented, and in the theorotical matter which is 

 introduced. A considerable variety of text-books in qualitative 

 analysis is required to meet the demands of teachers with courses 

 of different character and length. h. l. w. 



6. The Periodic Law; by A. E. Garrett. 12mo, pp. 294. 

 New York, 1909 (D. Appleton & Company). — This book, which 

 is one of " The International Scientific Series," gives a very full 

 historical and theoretical discussion of the periodic classification 

 of the elements. The subject is ably presented, and the book is 

 supplied with many useful tables and diagrams. The subject is 

 brought up to the most recent times, including, for instance, a 

 discussion of Sir J. J. Thomson's views in regard to atomic 

 structure. h. l. w. 



