1890.] Recent Literature. 1059 
the characteristics of the crystallographic systems. Then follows a 
statement of the deformations suffered by crystals under the influence 
of various agencies. The thermal, electric, and magnetic properties 
of crystallized material is next described in great detail, no less than 
one hundred and thirty-eight pages being devoted to these subjects. 
The optical properties of these bodies are hext considered, and two 
hundred and sixty-three pages are occupied in their treatment. Elas- 
ticity is next discussed in a separate chapter, while the tenth and final 
chapter treats of the relations existing between the elastic, optical, and 
the electric properties of crystals. 
Although the discussions are, on the whole, too mathematical for 
most mineralogists, there is much material in the book that will prove 
of great value to them ; while the mathematical portion should be very 
welcome to physicists, who pay far too little attention to the physical 
properties of that most important class of bodies,—crystalline sub- 
tances.—W. S. B. 
The Catalogue of Minerals’ published by Messr# George L. 
English & Co., Philadelphia and New York, is not merely a catalogue 
of specimens offered for sale by the above firm, but it is also a hand- 
book of the new and rare minerals recently found in the United States 
and other parts of America. About thirty pages of the little volume 
are reprints of the descriptions of these minerals as found in the 
original articles of the authors first describing them. Following these 
is a classified list of minerals, with their composition and crystalliza- 
tion. Finally, an alphabetical index to mineral names completes the 
volume, which is such an excellent little compendium of matters min- 
eralogical that it will surely find a place upon the shelves of all lovers 
of minerals. Bound copies of the catalogue we believe are for sale 
by the publishers at a nominal price.—W. S. B. 
WE have received from Burnz & Co., of 24 Clinton Place, N. Y., a 
pamphlet with the the modest title of ** Diana," by Mrs. E. B. Burnz. 
The wisdom which is therein set forth consists of a theory of the sexual 
nature of man which divides its manifestations into two categories, 
one functional, the other affectional. The author sets forth her belief 
that the latter of these is the proper outlet for surplus sexual energy, 
and that proper gratification of the affectional desires would operate 
as a safety-valve, so to speak, in preventing abnormal outbreaks of the 
desire for the functional manifestations. This proposition must stand 
or fall by the facts of the human organism, mental and physical, as we 
find them. We admit that the pamphlet brings an obstacle to its re- 
ception along with it in the new phonetic spelling which the author 
has adopted. However, we would not have this prejudice sturdier 
readers from attempting to judge for themselves. 
5 Fifteenth Edition, June, 1890, pp. 100. 
