86 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, [bull. 203. 
781 Warren (C. H.). [Reviews of u Elements of mineralogy, crystal- 
lography and blowpipe analysis," by A. J. Moses and C. 
L. Parsons; and "A text-book of important minerals and 
rocks," by S. E. Tillman.] 
Science, new ser., vol. 13, pp. 267-268, 1901. 
782 — — Penfield (S. L.) and. Some new minerals from the zinc 
mines at Franklin, N. J., and note concerning the chemical 
composition of ganomalite, 
See Penfield (S. L.) and Warren (C. PI.), 603. 
783 "Washington (Henry S.). The foyaite-ijolite series of Magnet 
Cove [Arkansas]; a chemical study in differentiation. I. 
Jour. Geol., vol. 9, pp. 607-622, 1901. 
Comprises a study of the chemical composition of several rock types 
and a discussion of their relations. 
784 - - The foyaite-ijolite series of Magnet Cove [Arkansas]; a chem- 
ical study in differentiation. II. 
Jour. Geol., vol. 9, pp. 645-670, figs. 1-3, 1901. 
Describes the petrographic characters of the rocks and compares them 
with similar rocks from other regions. Discusses differentiation in 
laccolithic magmas. 
785 - - The rocks of Lake Winnepesaukee, New Hampshire 
Abstract: Am. Geol., vol. 27, p. 44 (£ p.), 1901. 
Contains brief notes on the rocks. 
786 - A chemical study of the glancophane schists. 
Am. Jour. Sci., 4th ser., vol. 11, pp. 35-59, 1901. 
Abstract: Am. Geol., vol. 27, pp. 184-185, 1901. 
Describes the microscopic and chemical characters of these schists 
from several foreign countries and from western United States. 
787 Watson (Thomas Leonard). The granitic rocks of Georgia and 
their relationships. 
Am. Geol., vol. 27, pp. 199-225, pis. 17-24, 1901. 
Describes the microscopic and chemical and mineralogic characters 
of the varieties of granite and discusses the evidence of their intrusive 
origin. 
788 - - The Georgia bauxite deposits; their chemical constituents 
and genesis. 
Am. Geol., vol. 28, pp. 25-45, pi. 7, 1901. 
Describes the general geology of the bauxite area and the occurrence, 
geologic position, and chemical composition of the ore and discusses its 
origin. 
789 - - On the origin of the phenocrysts in the porphyritic granites 
of Georgia. 
Jour. Geol., vol. 9, pp. 97-122, figs. 1-6, 1901. 
Abstracts: Am. Geol., vol. 28, pp. 58-59, 1901; Am. Nat., vol. 35, pp. 
947-948, 1901. 
Describes the characters of the granites of the several areas studied, 
their chemical composition, and the genetic relationship of phenocryst 
to ground mass. 
