CONTENTS. LJ 
NUMBER CXIIlI. 
Art. XII.—Barometric Indications of a Resisting Aether; 7 
Purny Earve Cuase, M.A.,8.P.A.8., — - 153 
XIII. On the Action of Oil-Wells; by Prof. E. W. Rv. - 159 
XIV. Description of a new Machine for siadioi and Chart- 
ing Stars; by G. W. Hoven, A.M., - 1 
XV. Contributions to Lithology ; by T. Srerry Sint; M. A. Fr. R. s., 174 
XVI. Description of a new vipa of ein my: Wi.iiaAM 
Prescott, M.D., - 
XVII. On the rising of Siping: ne casein in Califor, ve: 
fore the winter rains; by H. Gispons, M.D., - 187 
XVIII. Notes on the New Almaden pated ‘ais, we 
B. Siruman, Jr., - . - 190 
XIX. Observations on a Seam of Coal s ree Prof, E. B. Anprrws, 194 
XX. On the Chimenti Pictures; by Prof. CHARLES A. Joy, - 199 
XXI_ Results of some recent Observations on the Solar morse 
with Remarks; by the Rev. W. R. Dawes, - : 
XXII. On Molecular Physics; by Prof. W. A. Norton, - - 
XXIII. Notice of the Remains of a Mastodon recently discovered 
in Michigan; by Prof. ALEXANDER WINCHELL, - - 
XXIV. Chladnite of the Bishopville Meteoric Stone proved to be 
a Magnesian Pyroxene; by Prof. J. Lawkence SmitH,  - 225 
XXV. Aerial Tides; by Putny Earte Cuase, M.A., etc., - 226 
XXVI. Extracts from the Address of Dr. J. W. Dawson, Presi- 
dent of the Natural History Society of Montreal, - - 231 
XXVII. On Celestial Dynamics ; by J. R. Maver, - - 239 
XXVIII. On a supposed change of level in a part of the (ee 
Mountains; by W. K. Scorr, M.D. From a letter to Prof. 
O. P. Hupparp, - 243 
' XXIX. Notes on the Platinum ‘Mesile “ M. iia: ice Part 
1 Il. On Reactions of the Platinum Metals, - - - 
XXX. Progress of the Geological Survey of California, - - 256 
SCIENTIFIC INTELLIGENCE. 
sics.—On a new class of Sulphur compounds, Von OzreLte: Ona 
_yery sensitive reaction for Iron, NaTaNson : On the conversion of mono-carbon acids 
into the corresponding more highly carbonated di-carbon acids, Kotse and MéxLiER, 
265.—On Thallium, Crooxes: On Cobaltic acid, WinxLER, 266—New method of 
