Vili CONTENTS. 
NUMBER CXCVIII. 
Page, 
Arr. XLIV.—History of the changes in the Mt. Loa craters, 
on Hawaii; by J. D. Dana. (With Plate XII).. ___- 438 
XLV.—Special Processes of Research; by G. K. Girperr__ 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.—Meteoric Iron which fell near Cabin Creek, Johnson 
County, Arkansas, March 27th, 1886; by G. F. Kunz. 
(With: Plate GID) x2 clog saan Se es es 494 
L.—The Johnson County, Arkansas, and Allen County, 
Kentucky, Meteorites; by J. E. Wurrrrerp .__)...__- 500 
LI.—Contributions to Mineralogy; by W. E. Hipprn and 
H. 8: WASHINGTON 1)02 00 Os lie hua 501 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics.—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.—To all American Geologists, 510.—International 
Congress of Geologists, American Committee, 511.—A Marine Biological Lab- 
oratory, 512. 
INDEX TO VOLUME X XXIII, 513. 
