44 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, [bull. 203. 
335 Halse (Edward). Some silver-bearing veins of Mexico. 
North of Eng. Inst, of Mg. & Mch. Engrs., Trans., vol. 50, pp. 202-217, 
1901. 
Contains brief notes on the vein systems of various mines. 
336 Hamilton (S. Harbert). Troost's survey of Philadelphia. 
Am. Geol., vol. 27, pp. 41-42 (} p.), 1901. 
Calls attention to the location of a copy of Dr. Gerard Troost's publi- 
cation on the survey of the environs of Philadelphia. 
337 and Withrow (James R.). The progress of mineralogy in 
1899, an analytical catalogue of the contributions to that 
science during the } 7 ear. 
Am. Inst. Mg. Engrs., Bull. No. 2, 1900. (Not seen.) 
Abstract: Am. Geol., vol. 27, p. 48 (J p.), 1901. 
338 Hanks (Henry G.). The deep-lying auriferous gravels and table 
mountains of California. 
San Erancisco, 15 pp., 6 pis., 1901. (Not seen.) 
339 arrington (B. J.). George Mercer Dawson. 
Am. Geol., vol. 28, pp. 67-76, pi. 9, 1901. 
Describes the life and work of Dr. Dawson. 
340 Harris (Gilbert I).). Oil in Texas. 
Science, new ser., vol. 13, pp. 666-667, 1901. 
Contains notes on the thbkness of the Tertiary in the vicinity of 
Beaumont. 
341 Haseltine (R. M.). Lignite deposits or fields of brown coal in 
North Dakota. 
Mines and Minerals, vol. 21, pp. 545-546, 1901. 
Describes character and occurrence of the lignite beds. 
342 Hatcher (J. B.). Diplodocus Marsh, its osteology, taxonomy 
and probable habits, with a restoration of the skeleton. 
Carnegie Mus., Mem. vol. 1, No. 1, pp. 1-63, pis. 1-13, figs. 1-24, L901. 
Abstract: Science, new ser., vol. 14, pp. 531-532, 1901. 
343 On the cranial elements and the deciduous and permanent 
dentations of Titanotherium. 
( !arnegie Mas., Annals, vol. 1, pp. 256-262, pis. 7-8, 1901. (Not seen.) 
344: Sabal rigida; a new species of palm from the Laramie. 
Carnegie Mus., Annals, vol. 1, pp. 263-264, 1901. (Not seen.) 
345 The Jurassic dinosaur deposits near Canyon City. Colorado. 
Carnegie Mus., Annals, vol. 1, pp. 327-341, 1901. (Not seen.) 
346 Some new and little known fossil vertebrates. 
Carnegie Mus., Annals, vol. 1, 1901. (Not seen.) 
Abstract: Am. Geol., vol. 27, p. 379, 1901. 
