74 BIBLIOGRAPHY AND INDEX OF N. A. GEOLOGY, [bull. 149. 
56<> Purdue (A. II.). [Eeview of "Sketch of the geology of the San 
Francisco peninsula,' 1 by Andrew C. Lawson.] 
Jour, of Geol., vol. iv. pp. 610-644, 18C6. 
501 Pynchon (W. II. 0.). The great falls of the Mohawk at Gohoes, 
X. V. 
Abstract : Am. Assoc. Adv. Sci., Prop., vol. xliv, p. 138 (-£ p.), 181)6. 
502 Quille (Dan de). The geological age of gold. 
Eng. and Mg. Jour., vol, Ixii, p. 54, 1896. 
Discusses the age of gold deposits in various parts of the United States. 
50.3 Ramsay (George S.). The northeastern bituminous Coal Measures 
of the Appalachian system. 
Am. Inst. Mg. Engrs., Trans., vol. xxv, pp. 76-83, 1896. 
Describes the character and distribution of the Coal Measure rocks 
and the occurrence of coal seams in Pennsylvania, West Virginia, and 
Ohio. 
504 Rand (Thomas I).). The serpentines of eastern Pennsylvania. 
Phil. Acad. Nat. Sci., Proc, 1896, p. 219 (| p.), 1896. 
Brief note on the occurrence of serpentine. 
505 Ransome (F. Leslie). The great valley of California. A criticism 
of the theory of isostasy. 
Univ. of Cal., Dept. of Geol., Bull., vol. i, pp, 371-428, 1896. 
Describes the great valley and its geologic evolution, and discusses 
the theory of isostasy as applied to other regions of elevation and sub- 
sidence. 
500 [Review of "The Neocene stratigraphy of the Santa Cruz 
Mountains of California," by George H. Ashley.] 
Am. Geol., vol. xvii, pp. 331-335, 1896. 
5G7 Raymond (R. W.). [The distinction between schisitosity and 
original bedding in crystalline schists.] 
Am. lust. Mg. Engrs., Trans., vol. xxv, pp. 1020-1021, 1896. 
In discussion of paper by H. B. C. Nitze and IT. A. J. Wilkius on 
"The present condition of gold mining in the southern Appalachian 
States/' 
568 The monazite districts of North and South Carolina. 
Am. Inst. Mg. Engrs., Trans., vol. xxv, pp. 1036-1038 and 1039-1040, 
1896. 
Discusses the use of the term augen-gneiss by C. A. Mezger in a paper 
on the same subject. See No. 505. 
509 Reid (Harry Fielding.). Glacier Bay and its glaciers [Alaska]. 
U. S. Geol. Surv., 17th Ann. Kept., pt. 1, pp. 421-461, pis. lxxxvi- 
xevi, 1896. 
Describes the glacial features of Glacial Bay and is vicinity, Alaska. 
