320 Soientifio Intelligence. 



short time, The method will be doubtless serviceable for other 

 purposes. The original article must be referred to for the details 

 of construction and manipulation. — Berichte, xliv, 1717. 



II. L. W. 

 6. Aqua liegia. — Peiwoznik lias shown, as the result of numer- 

 ous experiments, that the solution of gold in aqua regia takes 

 place according to the equation: An + HN0 3 + 4HC1 = H n O + 

 NO + HAuCI,, and the proportions corresponding to this equation 

 are recommended as being the most economical lor employment. 

 — Jour. C/iem. Soc, c. II, 484. h. l. w. 



II. Geology and Mineralogy. 



1. Publications of the United States Geological Survey. 

 George Otis Smith, Director. — Recent publications of 'the 

 U. S. Geological Survey are noted in the following list (continued 

 from p. 69). 



Folios. — Foxburg-Clarion Folio, Pennsylvania ; by E. W. 

 Shaw and M. J. Munn. Pp. 17, 2 charts, 4 colored maps. 



Burgettstown-Carnegie Folio (No. 177), Pennsylvania; by E. 

 W. Shaw and M. J. Munn. Pp. 16, 10 figures, 4 colored maps. 



Professional Paper 70. — The Mount McKinley Region, 

 Alaska ; by Alfred H. Brooks, with descriptions of the Igne- 

 ous Rocks and of the Bonnifield and Kantishna Districts, by L. 

 M. Prindle. Pp. 234, 18 plates, 30 figures. 



Mineral Resources, Calendar Year 1909. — Part I, Metals. 

 Pp. 616, 1 plate, 4 figures. Part II, Nonmetals. Pp. 942, 4 

 figures. — These volumes bring together in complete and perma- 

 nent form the numerous advance chapters Avhich have earlier 

 been given to the public. A considerable number of the chap- 

 ters from the report for 1910 have also been already issued. 



Bulletins. — No. 448. Geology and Mineral Resources of the 

 Nizina District, Alaska ; by Fred H. Moffit and Stephen R. 

 Capps. Pp. Ill, 12 plates, 11 figures. 



No. 449. A Geologic Reconnaissance in Southeastern Seward 

 Peninsula and the Norton Bay-Nulato Region, Alaska ; by Philip 

 S. Smith and H. M. Eakin. Pp. 146, 13 plates, 15 figures. 



No. 450. Mineral Resources of the Llano-Burnet Region, 

 Texas, with an Account of the Pre-Cambrian Geology ; by Sid- 

 ney Paige. Pp. 103, 5 plates, 22 figures. 



No. 452. The Lander and Salt Creek Oil Fields, Wyoming. 

 The Lander Oil Field, Fremont County ; by E. G. Woodruff. 

 The Salt Creek Oil Field, Natrona County ; by C. H. Wege- 

 mann. Pp. 87, 12 plates, 1 figure. 



No. 454. Coal, Oil, and Gas of the Foxburg Quadrangle, 

 Pennsylvania ; by Eugene W. Shaw and Malcolm J. Munn. 

 Pp. 85, 10 plates, 15 figures. 



No. 455. Copper Deposit of the Appalachian States ; by Wal- 

 ter Harvey Weed. Pp. 166, 32 figures. 



