- 
ene re 
CONTENTS. vii 
Miscellaneous Scientific Intelligence.-~The American Association, 287. —Addition to the 
Article on Method of correcting eau Means, by E. L. Defonase: Flint i 
ments, 289.—Library of works on Earthquakes and Volcanoes of Prof. Alexis Perrey, 
290.—Obituary.—Prof. Joun A. Porter, 290. 
Miscellaneous Bibliogrnphy.—-Geological Survey of Tlinois : oct Aquitanice, 291.— 
Notices of New Works and Proceedings of Societies, 291-292. 
NUMBER CXXVI. 
Art, XLI. William Rowan Hamilton, - i Gaus ae 
XLII. The Vowel Elements in Speech ; by ites PorTER, 303 
XLIII. Conclusive proofs of the animality of the ciliate Sponges, 
and of their affinities with the Infusoria senciaiade ; ad 
H. James-Ciark, - 320 
XLIV. Cusagigie Leaks to the Soe # Prof C. Rati, 325 
a On the Oil-producing ee of West barre : by Prof. 
. W. Evans, - : 
tee Remarks on the Drift of the Wisi sit Seioee Sak 
and its relation to the Glacier and ea: Theories; by 
Eve. W. Hitearp, : - - - 343 
XLVII. New = of bison fia in Cohahuila, Northern 
Mexico; by C. U. SHeparp, - - - - - 347 
XLVIII. On ie Spectra and Composion of the Elements ; ‘a 
Prof. Gustavus Hinricus, - 
XLIX. Contribution to the Chemistry of th Mineral Spdings of 
Onondaga, New York; by Cuartes A. GogssMANN, oe 
L. On some new Manipulations; by M. Carey Lea, = = (B75 
LI. Experiments on the Electro-motive Force and the Resistance 
of a Galvanic Circuit; by Hermann Have, - “ 
LIL. On the Spectrum of a new Star in Corona Borealis ; e 
Wituiam Hoaeins and W. A. Mitrer, M.D., - 
LIII. On the Source of Muscular Power ; by Epwarp Fuca 393 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics.—Apparatus for the direct determination of the velocity of sound 
in atmospheric air, by Dr. E. C. O. Neumann: Interference apparatus for sound- 
waves, by G. Quincxe, 417.—A new apparatus for the demonstration of the laws of 
falling aay F. Lirricn: Astro-photomieter and results obtained, by Dr. J. C. F. 
ZOLLNER, 418. 
Mineralogy aud Soles —Note on _ possible identity of Turnerite with Monazite, by 
J. D. Dana: Grahamite, 420.—On the discovery of Corundum at the Emery mine, a 
Chester, Mass., by Dr. C. T. at Note concerning minerals e 
mine of Chester, Mass., by Prof. C. U. Suzrarp, 421,—Laurite, a new | bes eral 
