Vill CONTENTS. 
Number 300. 
Page 
Arr. XLVII.—Temperature Variation of the Thermal Con- 
ductivities of Marble and Slate; by B. O. Prince and 
B.. Wo WiInnsOn 222. ~~ <2 22 cee 435 
XLVIIL—Central Michigan and the Post-Glacial Submer- 
gence; by EK. H! Mupeu .-.2.-25 022) ee eee 442 
XLIX.—Devices for the Separation of Minerals of high 
specific gravity; by S. L. Penriumip___- 22323 see 446 
L.—How to find the Key Note of Auditoriums; by E. 
CUTTER .--2 see eds- 227 -eb a ee rr 449 
LI.—Stratigraphy of the Kansas Coal Measures; by HE. 
Haworts. With Plate [X ..-5.2.. .225 33 eeeeeee 
LII.—Igneous Rocks of Yogo Peak, Montana; by W. H. 
Weep and L. V. PirssoN.---...<))-. 2 467 
LIII.—Preliminary Note on a new Alkali Mineral; by W. 
M. Foore _--..--2s.4)2¢1 23.2222 480 
LIV.—Three-toed Dinosaur tracks in the Newark Group at 
Avondale, N. J.; by J. B. WoopwortnH --.---.------- 481 
LY.—Afifinities and Classification of the Dinosaurian Rep- 
tiles; by O. C. Marsa. With Plate X. 2223 5ee seem 483 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics—Method for completely dehydrating Alcohol, H. Wis- 
LICENUS and L. KAUFMANN: Carbon in Meteoric Irons, Moissan: Study of 
Amorphous Boron, MoIssan, 499.—Preparation of Tin Tetrachloride and Tetra- 
bromide, LORENZ, 500.—Argon and Helium, BoucHARD: Photography of Colors 
by the indirect method, A. and K. LumiRe: Spectrum of Carbon of the electric 
oven, DESLANDRES, 501.—Measurement of high Temperatures, L. HOLBORN and 
W. WIEN, 502.—Absorption of Kathode rays, P. LENARD and O. LEHMANN, 503. 
Geology and Mineralogy—Underground temperatures at great depths, A. AGAS- 
s1z, 503.—Geological Atlas of the United States, 504.—EHconomie and Geologic 
Map of New York State, F. J. H. Mmrritt, 505.—Lakes of North America, 
I. C, RUSSELL: Phonolitic Rocks from Montana, W. H. WEED, 506.—Crystal- 
lography: A Treatise on the Morphology of Crystals, N. Srory-MASKELYNE, 
507. 
Botany—Sixth ae Report Missouri Botanical Garden, 507.—Index Kewensis, 
508, 
Miscellaneous Scientific Intelligence—Le Peétrole, L’Asphalte et ie Bitume au 
point de vue géologique, A. JaccaRD: Les Aurores polaires, A. ANGOT: Une 
Hxcursion en Corse, PRINCE R. BONAPARTE, 509. 
INDEX TO VOLUME L, 510. 
Ten-Volume Index, Vols. XLI-L, ready in January, price seventy-five cents. 
