734 The American Naturalist. [August, 
THURSTON, E.—Note on Tours along the Malabar Coast. Bull. No. 2, Madras 
Government Museum. From the Museum. 
ToLmaN, W. H.—History of Higher Education in Rhode Island. Bureau of 
Education, Cir. of Information No. 1, 1894. From the Bureau of Ed. 
Traquair, R. H.—Notes on Paleozoic Fishes. Extr. Ann. Mag. Nat. Hist., 
1894. From the author. 
WEIR, J.—Domesticity or Matriarchy, Which? Extr. Amer. Practitioner and 
News, Dec., 1894. From the author. 
WILLISTON, S. W.—New or Little known Extinct Vertebrates. Extr., Kansas 
Univ. Quart., Jan., 1895. From the author. 
WRIGHT, G. F.—Replies to Criticisms. Preface to SecondjEd. of Man and 
the Glacial Period. New York, 1894. From the author. 
General Notes. 
MINERALOGY.’ 
New Edition of Groth’s Physical Crystallography.—The 
concluding part of the third edition of this classic work’ has recently 
appeared, the entire book having been so largely rewritten as to be 
essentially new. The necessity of this shows what remarkable advances 
have been made in the science during the past few years. The new work 
is divided into three parts, treating respectively physical, geometrical, 
and applied crystallography. Unlike earlier editions, the development 
of the optics of crystals is not made to depend on Fresnel’s theory of the 
elasticity of the ether, but the optical characters are derived by the purely 
geometrical methods of Fletcher. Some features of this treatment 
have been already referred to in these notes. This treatment of the 
subject, which is certainly the more logical and may prove to be easier 
of comprehension by the student, involves a considerable change in the 
nomenclature of optical directions. 
The sections treating the electrical properties of crystals and the in- 
fluence of mechanical forces on crystals, as would be expected, contain 
a vast amount of new material. In the closing section of this part, 
‘Edited by Dr. Wm. H. Hobbs, University of Wisconsin, Madison, Wis. 
* Physikalische Krystallographie und Einleitung in die krystallographische 
Kenfitniss der wichtigeren Substanzen von P. Groth. 3d Ed. pp. 783, 3 colored 
plates. Engelmann, Leipzig, 1894. ` 
