No. 385.] REVIEWS OF RECENT LITERATURE. A 85 
On the shores of Kekequabic Lake is an augite-granite so closely asso- 
ciated with greenstone-conglomerates (probably tuffs) or greenstone- 
schists that gradations between the two are thought to have been 
discovered. Grant, who has studied the same granite, considers it a 
normal intrusive. 
Brush’s Manual of Determinative Mineralogy! appears in an 
entirely new edition, — the fifteenth. The book has been completely 
rewritten by Penfield since the thirteenth edition was published, only 
the plan of the original having been retained. The contents are 
entirely new. The present edition differs from its immediate prede- 
cessor in the addition of a chapter on the physical properties of 
minerals and in an entirely new set of analytical tables. 
The introductory portion of the volume occupies 244 pages, the 
tables 58 double pages, and the indices 12 pages. In the index to 
minerals are found the names of 1015 kinds, a fact that indicates 
the thoroughness with which the tables cover the field they are 
intended to cover. There are very few minerals known, except the 
rarest, that may not easily be identified by following the scheme of 
analysis indicated by the author. 
The chapter on physical properties is devoted mainly to an outline 
discussion of the principles of crystallography based on the theory 
of thirty-two classes of symmetry. It treats also very briefly of cohe- 
sion, luster, color, and density. All the explanations are clear and 
the descriptions lucid, so that the student need not have the least 
difficulty in following them. 
There is no question that Professor Penfield’s book will rapidly 
achieve the highest favor among teaching mineralogists. Were it 
not for the fact that it is somewhat expensive for a book of its kind, 
it would no doubt soon nearly supplant all other manuals of a 
similar character among English-speaking students. W.S.B. 
Notes. — The interesting group of lava flows for which the name of 
latite has been proposed by Ransome’? is carefully described in a 
recent Bulletin of the Survey. These rocks have already been re- 
ferred to in those notes. From the discussion of the relations of 
the effusives intermediate in character between the trachytes and 
1 Manual of a. nibs — an Introduction on Blowpipe Analy- 
sis, by George J. Bru Revised an larged, with entirely new tables for the 
identification of iaa by Samuel Penfield. Fifteenth edition. x + 312 pp 
375 figs. New York, Wiley & Sons, 1898. $3.50. 
? Bull. U. S. Geol. Survey, No; 89, Washington, 1898. 
