380 PETROLOGICAL ABSTRACTS AND REVIEWS 
VAN ORSTRAND, C. E., and WricHT, FrepD. E. “The Calculation 
and Comparison of Mineral Analyses,” Jour. Wash. Acad. 
Sct., IV (1914), 514-25. 
Various methods for adjusting chemical analyses are discussed, and 
the conclusion is reached that the present method of direct comparison 
of weight percentages of chemical analyses is sufficiently accurate. 
Viscont, K. On the Fluidal Texture of Some Dike Rocks from the 
Neighborhood of the Granite Stock of Turgojak in the Slatoust 
Mining District of the Ural Mountains. 1913. Pp.14. (In 
Russian language.) 
The granite intrusion of Turgojak cuts metamorphosed Paleozoic 
schists. Both the granite body and the country rocks are cut by two 
series of dikes following tectonic lines. 
Wapa, T., Editor. Beztrdge zur Mineralogie von Japan, No. 5, 
Tokyo, 1915. Pp. 201-5, numerous figures. 
Contains miscellaneous mineralogical papers by K. Jimbo, N. 
Fukuchi, M. Suzuki, W. Watanabe, M. Kawamura, K. Nakashima, 
and others. 
WARREN, CHARLES H. ‘‘The Ilmenite Rocks near St. Urbain, 
Quebec,” Amer. Jour. Sci., XX XIII (1912), 263-77, fig. 1. 
The writer describes a rutile-ilmenite rock from St. Urbain, Quebec, 
which he proposes to call urbainite. Two specimens give rutile 20.4 
(rr .3), ilmenite-hematite 73.2 (84.5), sapphirine 3.2 (0.7), remainder 
29 (B22) 
WarRREN, CHARLES H. “Petrology of the Alkali-Granites and 
Porphyries of Quincy and the Blue Hills, Mass., U.S.A.,” 
Proc. Amer. Acad. Arts and Sci., XLIX (1913), 203-330, pls. 
2, sketch maps 2, chemical analyses. 
The alkaline granitic magma of Quincy and the Blue Hills is believed 
by the author to have been intruded by stoping after Middle Cambrian 
but before late Carboniferous times. Having nearly reached the sur- 
face, the upper portions are rather vitreous while lower portions are more 
crystalline and appear as granite-porphyries. Still lower the rock is a 
fine-grained granite. In one portion of the field the marginal phase is 
