CONTENTS. ~ vii 
Page 
XLII.—The eee Geographical position of the large & 
masses of meteoric iron in North Mexico, with the 
Genoription “of a new mass—The San- -Gregorio Meteor- 
i . LAWREN GB Beira, oi Se ee ae 335 
XLIV.—On the Iridium compounds analogous to the Ethylen 
and Protochloride of Platinum Salts; by 8. P.Saprier, 338 
XLV.—Directions for Constructing Lightning-Rods : by 5 
BEY eek da ari li ito Oe ete eere ee eoess 344 
XLVI.—The Paragenesis and Da = Piag ee sets a 
associates on Lake Superior: by Rapsarn Pump 347 
XLVIIL—Obse crauons on the color of Phisreiseht. pac 
tions— ; by H. Morron, «2222052252 222 S008 355 
XLVIIL—Brief Contributions to Zodlogy from the Museum . 
ot Yale College. No. XVI—On the Distribavion of 
Marine Animals on the southern coast of New w Eng- 
lgnds by Ai BCVmmReiy ss foetus ieee es ee 357 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physies.—On nitro tf come itric acids, HASENBACH, 362.—- 
New method of separating aaahicie m potash and soda, SCHEERER, og 
On the methylation of the phenyl aioe in anilin, BERTHELOT, 364.— 
rene of “sage oe which correspond to ethylamin and eaytaanin, 
A. W. HorMany, 
Geology and Ne sine History.—Note on an Apparent Violation of the Law of 
eater Ae aermai deuitunntiinetion of the American Coal beds coming East, 
LESLEY, 366 n the Oil wells of Terre Haute, Tndiatia, Hunt, 369.—Surface 
Brunswick, MatTHEw, 371.—Remarks on Fossil Vertebrates 
x; re ing i i irection 0 
the U.S. Lake Survey, Suir —A. FEA ¥: Report of Botanical Sur- 
vey of Southern and Central g peltrso 374. oe ‘Dr. Rohrbach on Typha, 375. 
pro Nate ge teaber "estat 376.—Encke’s Comet, 380.—Discovery of new 
* Planet, Luruzr, 38 
entific Tatclijense —Midway merece te" be the North Pacific, 380.— 
Pee 1.—-The 
Eruption of the Volcano of Colima in June, Sartortus, 381.— 
Variations of in the Western puovigned of] R SAWITSCH 
ogical Results of the 1870 Dredging Expedition of the Yacht * Norna” 
off the coast of Sp Portugal, W. 8S. , 385. “ats truction of the 
vad the Chicago Academ ‘ga Sciences, 387. Sime ee in N. Jersey, Delaware 
Pennsylvania, W. WG ter D. Knieskern, Pati 
ale Edwards Holbrook, 389; Tr De Carle Snot. ae R I, Murchison, 3 
Miscellaneous grb a far — —_ ese of Weights, Measures 
and Money, Mann: Earthqua’ antain Building, WHITNEY : 
The Minerals and Gothtey of Denial? taka, 7% Danas 390. 
NUMBER XIL 
Art. XLIX. one the Geological History of the Gulf of Mex- 
ico; by E. W. Hina. With & Map. 0-2-5 391 
Space; by Asapu a Hat, PE 
