CONTENTS OF VOL. XIX.—FOURTH SERIES. vil 
Page 
Mr. T. F. Jamieson on the Drift and Gravels of the North : 
of Scotland. . 399 
Dr. T. Wright on n the Lower Lias of the South ‘of England. 400 
Mr. J. W. Kirkby on the Occurrence of Lingula Credneri 
in the Coal-measures of Durham .................. 401 
Mr. C. H. G. Thost on the Rocks, Ores, and other Mine- 
rals on the property of the Marquis of Breadalbane .. 402 
Note on the Specific Gravity of Electro-deposited Amorphous 
muuimony, by G. Gore, Hsqueir ns caer «\. cPaaicis ce ee ope 403 
On the Production of Ozone by means of a Platinum Wire made 
Incandescent by an Electric Current, by M. Le Roux .... 403 
Observations on the Useof Insoluble Compounds in Voltaic Piles, 
RUE MICEQUEDCLS oo). te sis eu wise a anche 's Beard ce wre oie a OA: 
NUMBER CXXIX.—JUNE. 
Prof. J. P. Cooke: Crystalline Form not necessarily an indica- 
tion of definite Chemical Composition; or, on the possible 
Variation of Constitution in a mineral Species independent of 
the Phenomena of Isomorphism® 2.1)... -.:..25.. 02-000: 405 
Dr. Lamont on Phenomena observed during Total Eclipses of 
Zheyounsa(Withrawblates)) ayes sme ee cleus ol suelets oe eeee ALG 
Prof. Hennessy on the Vertical Currents of the Atmosphere .. 421 
M. Poinsot on the Percussion of Bodies (continued) ........ 430 
Prof. Clausius on the Dynamical Theory of Gases .......... 434 
Mr. M. Ponton on the Law of the Wave-lengths corresponding 
to certain points in the Solar Spectrum ................ 437 
The Rev. S. Haughton on the Thickness of the Crust of the 
BranGlnchaee ee Pe ark Sas a fcee ibis s, era sta Goa ole ola Map Gee men erondaiees 444 
The Rev. S. Earnshaw on a new Theoretical Determination of 
EN IOCIEY OR ISU, mis itys visia digs velo eae a aw eS. 8eye RO? 449 
M. G. Quincke on a new kind of Electric Current.......... 455 
Proceedings of the Royal Society :— 
Dr. Dobell on the Influence of White Light on the Growth 
and Nutrition of Animals ..... 458 
Mr. W. J. M. Rankine on the Thermodynamic Theory ‘of 
Steam-engines with dry Saturated Steam .......... 460 
Dr. Hofmann on [riphosphonium Compounds ....... 460 
Prof. Powell: Comparison of some recently determined 
Refractive Indices with Theory....... Say aoe etin teen tO 
Proceedings of the Geological Society :— 
Mr. J. Lamont’s Notes about Spitzbergen in 1859...... 467 
Mr. C. Moore on the so-called Wealden Beds at Linksfield. 468 
New Secondary Pile of great power, by M. G. Planté ...... 468 
Note on the Use of Sulphate of Lead in Voltaic Couples, by M. 
REECE ese Retsiaicca ae hin Wats: Fhas WS on) ghee si, « irre busiive 469 
MMAR eS? Se arate ieee al Sc 6 audi ev eio, aca Peres heh salieeectavehotaeety: aes 471 
