NUMBER LXXVIII. 

 Art. XLIIL— An account of the Discoveries in Vermont Geol- ^ 



ogy of the Rev. Augustus Wing; by James D. Dana,. 405 

 XLIV.— On Barite crystals from the Last Chance Mine, 



Morgan County, Missouri ; and on Gothite from Adair 



County, Missouri ; by G. C. Bhoadhead, 419 



XLV.— Estimation of Chromium and Aluminium in Steel and 



Iron; by Andrew A. Blair, 421 



XL VI.— On the Chemical Composition of Triphylite, from ' 



Grafton, New Hampshire; by Samuel L. Penfield, . . - 425 

 XLVIL— On a new Mode of Manipulating Hydric Sulphide ; 



by Josiah P. Cooke, Jr., 42*7 



XLVIII. — Report on the Physical rried on 



by P. Herbert Carpenter, B.A., in H.M.S. "Valorous," 



during her Return Voyage from Disco Island in August, 



1875 ; by William B. Carpenter, 437 



XLIX. — On the influence of Geological Changes on the Earth's 



Axis of Rotation ; by George H. Darwin, _ - 444 



L. — On a Base derived from a Waste-product in the Aniline 



Manufacture ; by C. Loring Jackson, 449 



LI.— On an association of Gold with Scheelite in Idaho ; by 



B. SlLLIMAN, 451 



LIL— Ninth Report of the British Association Committee, 

 appointed for the purpose of investigating the Rate of 

 Increase of Underground Temperature downward in vari- 

 ous Localities of Dry Land, and under Water; by Prof. 



SCIENTIFIC INTELLIGENCE. 

 Chemistry and Physics.— -Iodine Trichloride, Cheistomanos, 461.— The Atomic 

 Weight of Selenium, Pbttebsoh and Ehman: Trihyd 



........... 



Decomposition of Glyoxalyl-urea, Medicus, 463.— Two new Alk;.l<> 



: 



Blood of Wild Ui is. <'r.o 1- • -- . - r i, . i;. iiixvikk. 



464.— Polarization of the Rainbow, M. J. Dechant, 465.— The Radiometer : 

 Fluorescence, M. E. Lommel, 466. — Electricity and the Electric Telegraph, G. 

 B. Prescott, 461. 



Re port on the Geographical Surveys west 

 ■ " 

 of the Territories, F. V. Hatden : Contributions fr >.. 



Gnemon, O. Beccaei, ' 469.— The Paleontological Origin of those trees and 

 shrubs indigenous to the nam BEACH, 



171.— > ■ .i kkki \. IT'J. 



—Preliminary Note on the Developmui: oi Orgai 



e ill, 480. ' VV 



Miscellaneous .- » ,1 V« ..I. mv ..1 -uni.es 481.— Excre- 



mentitious deposits in the Koeky Mountain region, H. W. Henshaw : Fourth 



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