42 
253 Grant (C. 0.). Additional notes regarding our local graptolites. 
Hamilton Assoc, Jour, and Proc, No. 12, pp. 159-163, 1896. 
Notes on localities in the vicinity of Hamilton, Ontario, where grap- 
tolites have been found. 
254 Grant (U. S.), Winchell (N. H.) and. Volcanic ash from the north 
shore of Lake Superior. 
See Winchell (N. H.) and Grant (U. S.), No. 766. 
255 G-ratacap (L. P.). Fossils and fossilization. 
Am. Nat., vol. xxx, pp. 902-912, 993-1003, 1896. 
Describes the characters, preservation, and distribution of fossils. 
256 [lie view of "A dictionary of the names of minerals, including 
their history and etymology," by A. H. Chester.] 
Science, new ser., vol. iv, pp. 117-118, 1896. 
257 Greenleaf (James L.). The hydrology of the Mississippi. 
Am. Jour. Sci., 4th ser., vol. ii, pp. 29-46, 1896. 
Describes the drainage area of the Mississippi and its tributaries, the 
distribution and amount of rainfall, and the temperature and character 
of the flow of the streams. 
258 Greenlee (W. B.). The amount of water in the earth's crust. 
Am. Geol., vol. xviii, pp. 33-35, 1896. 
Describes the author's method of computing the amount of water in 
the earth's crust. 
259 Gresley (W. S.). Traces of organic remains from Huronian (?) 
series at Iron Mountain, Mich., etc. 
Am. Inst. Mg. Engrs., Trans., vol. xxvi, pp. 527-534, 1896. 
Describes the characteristics of markings, considered to be of organic 
origin, from the ore bodies at this locality. 
260 Observations regarding the occurrence of anthracite, with 
a new theory of its origin. 
Am. Geol., vol. xviii, pp. 1-21, pi. i, 1896. 
Discusses J. J. Stevenson's theory as to the origin of Pennsylvania 
anthracite and the origin of the metamorphism in this region. De- 
scribes the conditions in other coal fields. 
261 A granite bowlder near Pittsburg, Pa. 
Am. Geol., vol, xviii, pp. 331-332 (correspondence), 1896. 
Gives reasons for supposing this to be an erratic belonging to the 
Glacial period. 
262 Griswold (Leon S.). Notes on the geology of southern Florida. 
Harv. Coll., Mus. Comp. Zool., Bull., vol. xxviii, No. 2, pp. 52-62, pis. 
xvii-xxvi, 1896. 
Describes the character of the Everglades and the occurrence of oolitic 
limestone. Discusses the origin of the oolite. 
263 Guentherodt (J. J.). Twin lakes region [Colorado]. 
Colliery Eng., vol. xvii, pp. 201-202, 1896. 
Describes the occurrence of gold placers and veins near Leadville, Colo. 
