CONTENTS. V 
Number 297. 
Page 
Art. XX.—Distribution and the Secular Variation of Ter- 
restrial Magnetism, No. Il; by L. A. BavzEr--.._--. 189 
XXI.—Outlying Areas of the Comanche Series in Kansas, 
Oklahoma and New Mexico; by R. T. Hitu..--.--. -- 205 
XXII.—The Relations of the Diurnal Rise and Fall of the 
fey md inthe United States; by FP. Waupo...--..---.-- 285 
XXIII.—Stratigraphy of ‘the Kansas Coal Measures; by 
vos LE TACs Sea aes ee 2 ee 239 
XXIV.—On the so-called Schneebergite; by A. 8S. EaKie 
POPC, ee NETIC ANUS eee 6 ii ie a yn WPS 244 
XXV.—Native Sulphur in Michigan; by W. H. Suerzer _ 246 
XXVI.—Double Salts of Cxsium Chloride with Chromium 
Trichloride and with Uranyl Chloride; by H. L. Wetts 
MimbsworwsOMiW OOD) j¢s2 oc 22s oe a ee 249 
XXVII.—On two new Meteorites; by E. E. Howern (With 
ENE LAT) bag eal RT OR ee eee nN Seer oe 252 
XXVIII.—The Reduction of the Acids of Selenium by 
Hydriodic Acid; by F. A. Goocu and W. G. Reynoups 254 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics—Helium, a constituent of certain Minerals, W. Ramsay. 
‘J. N. Coutre and M. Travers, 259.—Argon and Helium in Meteoric Iron, W. 
RAMSAY: The physical properties of Argon, LorD RaAyLeted: The Fluo- 
rescence of Argon, 264.—The Principles of Physics, A. P. GAGE, 265. 
Geology and Mineralogy—The Protolenus fauna, G. F. MATTHEW, 265.—Pre- 
Cambrian organisms, L. CayEUX, 267.—Grundziige der Palzontologie (Palzo- 
zoOlogie), VON K. A. VON ZITTEL, 268.—The occurrence of Tertiary clay on 
Long Island, N. Y., A. M. Epwarps: On Composite Dikes in Arran, Jupp, 
270.—A plumbiferous Tetrahedrite, G. C. HOFFMANN, 273.—Minerals and how 
to study them: A book for beginners in Mineralogy, E 8. Dana: The Consti- 
tution of the Silicates, F. W. CLARKE: Native Silica: a treatise upon a series 
of specimens of Quartz, Rock crystal, Chalcedony, Agates and Jaspers, etc., 
B. WRIGAT, 274. 
Miscellaneous Scientific Intelligence—Report of the Committee appointed by the 
Smithsonian Institution to Award the Hodgkins Fund Prizes, 275. 
