RECENT PUBLICATIONS 487 



States, 1906. [U. S. Geological Survey, Water Supply Paper No. 204. 



Washington, 1907.] 

 — Hall, M. R., Grover, N. C, and Horton, A. H. Surface Water Supply 



of Ohio and Lower Eastern Mississippi River Drainages, 1906. [U. S. 



Geological Survey, Water Supply Paper No. 205. Washington, 1907.] 

 — Hall, B. M., and Hall, M. R. Water Resources of Georgia. [U. S. Geo- 

 logical Survey, Water Supply Paper No. 197. Washington, 1907.] 

 — Harper, Roland M. Some Hitherto Undescribed Outcrops of Altamaha 



Grit and Their Vegetation. [From the Torreya, Vol. VI, No. 12, Decem- 

 ber, 1906.] 

 — Hatjg, Emile. Traite de Geologie. I. Les phenomenes geologiques. [Li- 



brairie Armand Colin, Paris, 1907.] 

 — Henriksen, G. Sundry Geological Problems. [Grondahl and Son, Chris- 



tiania, 1906.] 

 — Hilgard, Eugene W. Biographical Memoir of Joseph Le Conte, 1823-1901. 



[Read before the National Academy of Sciences, April 18, 1907.] 

 — ^HoBBS, William Herbert. Earthquakes, an Introduction to Seismic Geol- 

 ogy. [D. Appleton & Co., New York, 1907.] 

 — HoBBS, W. H., AND Leith, C. K. The Pre-Cambrian Volcanic and Intrusive 



Rocks of the Fox River Valley, Wisconsin. [Bulletin of the University of 



Wisconsin, No. 158. Madison, May, 1907.] 

 — HoTCHKiss, William Otis. Rural Highways of Wisconsin. [Wisconsin 



Geological and Natural History Survey, Bulletin No. XVIII. Madison, 1906.] 

 — ^Huntington, Ellsw^orth. Some Characteristics of the Glacial Period in 



non-Glaciated Regions. [Bulletin of the Geological Society of America, 



Vol. XVIII, pp. 351-88. New York, October, 1907.] 

 — HussAK, Eugenio. O Palladio e a Platina no Brazil. [Extr. dos Annaes 



da Escola de Minas de Ouro Preto, N. 8, 1906.] 

 — Illinois State Geological Survey. Bulletin No. 4 — Year Book for 1906. [Urbana, 



University of Illinois, 1907.] 

 — ^Jefferson, Mark. Lateral Erosion on Some Michigan Rivers. [Bulletin of 



the Geological Society of America, Vol. XVIII, pp. 333-50. New York, 



1907.] 

 Glacial Erosion in the Northfiord. [Bulletin of the Geological Society 



of America, Vol. XVIII, pp. 413-26. New York, November, 1907.] 

 — ^Johnson, Douglas Wilson. Report on the Geological Excursion through 



New Mexico, Arizona, and Utah, Summer of 1906. [From Technology 



Quarterly, Vol. XIX, No. 4, December, 1906.] 

 -Volcanic Necks of the Mount Taylor Region, New Mexico. [Bulletin 



of the Geological Society of America, Vol. XVIII, pp. 25-30. New York, 

 July, 1907.] 

 -Konigsberger, Joh. Normale und anormale Werte der geothermischen 

 Tiefenstufe. [Aus dem Centralblatt fiir Mineralogie, Geologie und Palaon- 

 tologie, No. 22, Jahrg. 1907. Stuttgart.] 



