viii CONTENTS. 
NUMBER CLXVIIL. 
Arr. XLVIITI. ae and gags gon of ee by 
Page 
407 
C. A. ‘ 
LI.—Paleozoic Rocks of Central Texas; by C. D. W atcort, 431 
LIT. gr pene of Terrestrial Rotation for the Deflection 
at. 434 
of Streams; by PING otek Fink ia cia a awigta bars 
LIL. Gheneh Afiinity ; = UY J. W.. DAMGLEY io 5825 er ce 
y 437 
LIV. Pas ge ei a» odes of Occurrence of Gold in Brazil; by 
440 
LV. epieniniape. AE Borate of Lime; by A. W. J ACKSON, 447 
LVI.—Decay of Quartzyte, and the formation of sand, kaolin 
and crystallized quartz; by J.D. Dana,__-.____.___.. 448 
SCIENTIFIC INTELLIGENCE. 
Physics,—Cause of the discrepancy between the observed swe 
motive force of a Battery and that calculated from thermochemical da 
NW, 452.—Color of Chemical Compounds as a ‘function of the Atomic ecatt 
of their constituent Elements, CARNELLEY, .—Gas Analysis under greatly 
diminished Pressure, L. Meyer and SEvuBERt, 454,.—Synthesis of Galenite by 
: ; anaes 
and Gosstn, 455.—Electro-magnetic Rotation of the plane of mer 
ride, ESSNER 
zation of light, A. Kunpt: A new form of Polariscope: Conduc’ uctivity 0: 
our- 
portion of a Solar Spectrum, H. BecQuEREL, 459.—The Strain oe with 
ization and with the Serslibehent of perlitic structure, F. RuTuey, 461. 
and Ses —The Copper-bearin ¢ Rocks of Lake Superior, R. D. 
ares. 462.—Note on the Paramorphic origin of the Hornblende of the Crys- 
talline Rocks of the Northwest, R. D. Irvine, 464,—Berlin Archeeopte 
Deposition of Ores, NEWBERRY, 465 instances of 
i on on Sandstone, M. E. Wapswortn, 466.—Structure of g- 
lish and American Carboniferous Coals, E. WETHE 67. o of South 
- R. Jones, 468.—Miniature Domes in Sand, T. M. READE: A Trea- 
tise ) J. A LLIPS, — on Coal of 
Pennsylvania and the United States: Lithological Studies, E. W. 
Carboniferous Seager and Myria UDDER, 4 0-— Macfarlane 
Geological Railway Guide: Ooinipoaiticn of Herderite, F. A, Gent 
Botany and Zoology. Saeeam of the Flora of Minnesota, WARREN fe 472 
rtorium Annuum Literature Botani icee Hee geen G. CW. - BOHNENSIEG, 473. 
ische Practicum, Prof. SrRAsBURGER, 474. e iasedeas of, Botany, 0. BE. BESSEY : 
Gunitherkraches and Echidna, 475.—Organisms in Ice, Prof, Letpy, 476, 
ne 
—Observations made on the Expedition to — Island, 
Astronomy and Geodesy. 
Wi: Urron, 477.—New form of Primary Base Apparatus, T. W. W 
neous Scientific mts ey —Extracts me ~ vate to J. D. Dana, ey B. A, 
ar Dynamics, 
Miscellaneous 
Gov: Sir William Th 3 Lectures on 
