CONTENTS. 
Page. 
Art. XLIV.—History of the changes in the Mt. Loa craters, 
on Hawai; by J. D. Dana. (With Plate XIM).. ___- 433 
XLV.—Special Processes of Research; by G. K. GirsertT__ 452 
XLVI—Geology of the Rainy Lake Region, with remarks 
on the classification of the Crystalline Rocks west of 
Lake Superior. Preliminary note; by A. C. Lawson_- 473 
XLViI.—Identity of the Photosalts of Silver with the Mate- 
rial of the Latent Photographic Image; by M. C. Lua _ 480 
XLIX.—Meteorie Iron which fell near Cabin Creek, Johnson 
County, Arkansas, March 27th, 1886; by G. F. Kunz. 
€WithoPlate: 0) <3 se ee 494 
L.—The Johnson County, Arkansas, and Allen County, 
Kentucky, Meteorites; by J. KE. Wuirrietp -__. ....-. 500 
LI.—Contributions to Mineralogy; by W. E. HippEen and 
He S. W ASHINGTON<) (232 5 0s 501 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Phisies—Decomposition of Potassium chlorate by heat, FRANK- 
LAND and DINGWALL, 508.—Influence of Silicon on the Properties of Iron and 
Steel, TURNER: Agriculture in some of its relations with Chemistry, F. H. 
Storer, 509.—Studies from the Laboratory of Physiological Chemistry, Sheffield 
Scientific School of Yale University, for the year 1885-86, R. H. CHITTENDEN, 
510. 
Geology and Natural History.—Yo ali American Geologists, 510.—International 
Congress of Geologists, American Committee, 511.—A Marine Biological Lab 
oratory, 512. 
INDEX TO VOLUME XXXIII, 513. 
