April lo, 1891.] 



SCIENCE. 



209 



Much yet remains to be learned on the subject of which it treats; 

 but that which is already known, or at least the essential or 

 a'vailable part of it, is lucidly presented. 



The author takes up the subject of alloys where ordinary metal- 

 lurgical treatises finish with it, and goes at once into the practical 

 side of it, including the various uses to which the alloys are put. 

 He also gives a brief account of the properties of the separate 

 metals, and of the effects of certain elements upon them. Com- 

 mercial metals are not chemically pure; and as the presence of 

 impurities often produces characteristic results, which may be a 

 useful guide, this part of the book will have a special value to 

 manufacturers. A short account of chemical terms and principles 

 is given for persons not familiar with chemical processes. 



AMONG THE PUBLISHERS. 

 The American Academy of Political and Social Science has 

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issued deals with the "Genesis of a Written Constitution," by 

 Professor Morey of Rochester; "Natural Law," by Professor 

 Taylor of Michigan; "Compulsory Voting." by Mr. F. W. HoUs 

 of New York; and "The Wealth Concept," by Professor Tuttle of 

 Amherst". Another article treats of economic instruction in Italy, 

 and gives an account of the university system. The proceedings 

 contain a discussion of the Ojiginal Package decision by Messrs. 

 Budd and Wintersteen of the Philadelphia bar. In addition to 

 the Annals, the American Academy of Political and Social Science 

 issues from time to time supplementary volumes of interest to 

 students of economics and politics. The first of these, the 

 " History of Statistics," by Professor August Meitzen of Berlin,, 

 has just appeared. 



— Heinemann of London announces a new volume dealing with 

 the much-discussed Marie Bashkirtseff, entitled " The Social Life 

 of Marie Bashkirtseff, being Extracts from her Letters and Jour- 

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