80 Scientific Intelligence. 



search, for potash) ; of this 75 per cent was expended west of the 

 one-hundreth meridian. 



Other publications are : 



Professional Papers, No. 123. — A Superpower system for the 

 region between Boston and Washington ; by W. S. Murray and 

 others. Pp. 261, 11 pis., 61 text figures. This is the report of a 

 special investigation of the possible economy of fuel, labor, and 

 materials resulting from the use in the industrial region named 

 of a comprehensive system for the generation and distribution of 

 electricity to transportation lines and industries. The investiga- 

 tion was made by a staff of engineers under the administrative 

 supervision of the Geological Survey The annual net saving, 

 after fixed charges are deducted, if the energy required in this 

 region in 1930 were supplied by a co-ordinated power system, as 

 described, is estimated at $429,000,000 ; the annual return on the 

 investment would be 33 per cent. Of the 36,000 miles of railroad 

 in this region it is estimated that 19,000 miles can be profitably 

 electrified, so as to yield by 1930 an annual saving of $81,000,000 

 as compared with the cost of operation by steam. The coal saved 

 annually under the superpower system would amount to 50,000,- 

 000 tons. The system contemplates interconnection of existing 

 plants and systems and construction of new steam-electric and 

 hydroelectric plants at the most favorable locations. This 

 "superpower zone" embraces one-fourth of the population of 

 the United States, with a corresponding importance in railroads, 

 industrial plants, etc. 



No. 129. Parts C to I. 



Topographic Atlas : — Forty-three sheets. 



Geologic Folio, No. 213. New Athens-Okawville, Illinois ; by 

 E. W. Shaw. 12 pages of folio text, 4 maps, 6 text figures. 



Bulletins : — Several parts, separately issued, of Nos. 722, 725, 

 726, 730, 735. Part B of No. 735 by L. F. Noble describes the 

 colemanite of Clark County, Nevada. This occurs in fairly 

 extensive deposits of economic importance. 



Water Supply Paper: — No. 500, C. Some characteristics of 

 Run-off in the Rocky Mountain Region ; by Robert Follansbee. 

 17 pages, 10 text figures, and in 



Mineral Resources. — Numerous advance chapters. 



3. Die Eruptivgesteine des Kristianiagebietes IV. Das Fen- 

 gebiet in Telemarh, Norwegen; by W. C. Brogger. Videnskap. 

 Skrifter. I. Mat.-naturw. Klasse 1920, no. 9. 408 pages, with 2 

 geologic maps, 30 plates, and 46 text figures. Christiania, 1921. 

 — It is nearly a quarter of a century since the third volume of the 

 epoch-making series "Die Eruptivgesteine des Kristianiage- 

 bietes" appeared. During this interval detailed mapping of 

 the region has been in progress, and a vast amount of material 



