Rcz'iczv of Recent Geological Literature. ^Q 
phenocrysts from the border zones of the granite masses and a gra- 
dation peripherally from an interior porphyritic facies into an even- 
granular granite of coarse texture and of the same mineral and chemi- 
cal composition. 3. The absence of any evidence of magmatic resorp- 
tion or corrosion of the phenocrysts. 4. The absence of any flow 
structure. 5. The abundant inclusions of all the ground mass constitu- 
ents, a feature very characteristic of these porphyritic granites. A table 
of the chemical analyses of these rocks accompanies the article. 
c. H. \v. 
Studies for Students. By O. C. pAiiRiNGTON. (Jour. Gcol., Yo\. IX, 
pp. 51-65 and 174-190.) 
This is a study of meteorites in regard to their chemical and miner- 
alogical composition, their petrographical characteristics, their terres- 
trial analogies, and to some of the theories relating to their origin. 
c. H. \v. 
Mineralogical Notes. By C. H. Warren. (Am. Jour. Sci.j 161, 
369-373-) 
The following minerals are described : — anorthite crystals occur- 
ing as a contact mineral in the limestone at Franklin Furnace, N. J. ; 
soda orthoclase crystals of peculiar habit from a phonolyte dike, Crip- 
ple Creek, Colo. ; iron wolframite crystals from South Dakota ; pseudo- 
morphs of wolframite and scheelite from Trumbull, Conn. c. h. w. 
A ■* Te.vt-Book of Geology. By A. P. Brigham. D. Appleton & 
Co. 1901. 
This volume is intended for use in secondary schools. It is the 
latest of the series of Tzventieth Century Text-Books, and like its pred- 
ecessors, it is admirably bound and illustrated. Its treatment of the 
subject is physiographic in standpoint, its style simple, and its lan- 
guage untechnical. Dynamical and structural geology are treated in 
a manner well suited to explain the essential facts to young students, 
while at the same time its conceptions are thoroughly up to date. Its 
treatment of historical geology is over-brief, being merely a summary 
of life development and of continental evolution. There are excellent 
pictures of fossils, but the discussion of them brings out little beyond 
geographic distribution. No attempt is made either at a phylogenetic 
interpretation of fossils, nor is the method of determining geological 
horizons by means of them discussed. There is no suggestion of the 
manner of interpreting past conditions from the paleontological evi- 
dence. The term Lower Silurian is retained in preference to the more 
generally accepted Ordovician. 
The book is the best elementary text-book yet produced. As Gil- 
bert said in his Lake Bonneville Monograph, "it is through the study 
of the phenomena of the latest period that the connection between pres- 
ent processes of change and the products of past changes is established." 
Mr. Brigham is the first to make in a text-book the true use of 
physiography, not as a separate department of geology, but as the key 
to all the others. With biological and stratigraphical explanations from 
the teacher, the liook will be a<lmiral>Iy suited to the purpose tor which 
it is intended. i. h. o. 
