CONTENTS. Vv 
NUMBER LL 
Page 
Art. XVIII.—On some Phenomena of Binocular Vision; by *e 
Osun LEOOnTe, 6 wooo es aeeae hs at oe Sc cen. 159 
XIX.—Jeffries Wyman. Address of Professor A. Gray,_-- 171 
XX. ra Gigantic Cephalopods of the North Atlantio. by 
A. E. Vrrritt, with Plate v 177 
XXI.—The Trap Rocks of the Connecticut Valley; by 
ape Goue sl Se ee wa we eee ee me coe 85 
Grorce W. Haw 
XXII.—On the: Conipanvon of Certain Theories of Solar 
Structure with Observation ; by 8. P. Laneiry, with 
WN VE iis eek eee eeeewede tue eee ys oes bee 1 
XXIIL.—Notes on Costa Rica Geology; by W. M. Gass,.__ 198 
XXIV.—Note on the Discovery of a new ee of Denes 
dial Fossils in Rensselaer County, N. Y.; by S. W. Forp, 204 
XXV.—Abstract of a Memoir on the Origin, and Mechanism 
of Proauctian, of the Prismatic or Coltnnar Structure of 
Basalt; by Rosse MALLET, 206 
Apprnprx.—XXVL—Notice of New Booted! Mammals, IV; 
WOO Miuan 0 63 6 a a ae 
SCIENTIFIC INTELLIGENCE. 
Chemistry and P, —On Atmospheric Hydrogen Peroxide, Scu6yx, 211.—On 
the SS ibaa . of Eanes and Sodium, Roscoz and Scuuster, 212. 
—Preparation of Glacial Formic Acid, M. Buena: On Phosphenylous Acid, 
ry aca md 
trating the — of the re in Organ Pipes; by JosepH LovERine, 219. 
Geology and Natural History — Ores a Eocene Mammals, 0. C. Mars: On 
_ alleged. ese of Go, i" aie by J. J. heey 221.—Diatoms of 
@ Carboniferous, F. ee ae A new w Mastodon, CopE: The Geology of 
oa Hampshire, C. H. Hrroncoox, 222. Spi g Annual cals of the Geologi- 
cal and Agricultural Survey of Texas, by 8S. B. B —Second Geologi- 
cal Survey of Pennsylvania, by PrrrR LESLEY, 295, parte ia Explorations 
~—  yebhtae west of the 100th Meridian n, G. M. WHEELER: Notes on the Natu- 
rtions of Montana and Dakota: Geological and Geographical 
aly of the Territories, F AYDEN, 226.—Carte hydrologique du De 
ent de Seine-et-Marne, by Detzsse: Note on the genus Calamodon; by E 
D. Corr, 228.—Shep s Pipe he Reindeer era; Lead vein in Newbury 
ord of Geologic: | Literature, W. WuiTaKER: Composition of the 
native alloy of Gold il the Coms Lode, Nevada, MELVILLE At- 
gical Note, by ALBERT R. Leeps, 229.—Action of light e 
development of the young of Frogs: Dimorphie Development and ae 
*: ie 
of Generation in the Oladocera, G. O. SARs, 230.—Development of the Euro 
qoutes, Sars, 231 .-—Cumacea from the West Indies and the South Atlantic; een 
‘ ARS : 
50 the Cotton Worm of the Southern States, by A. R. GroTe, 232. 
—The Transit fed Meese Dee. 8, 1874, 234.—Observations on the Tran- 
Petes of Vous at Na agasak. 
Miscellaneous Scienti pean Canadian Scientific Research in 1874, 236— 
, ‘ 
— sted by J. M. sag pe 237.—The os and its ore 
ae by on. Ganesan: ‘Mt. Katahdin, 238.—Obituary. — D’Omaliu 
d'Halloy : Sir Charles Lyell, 238. 
