CONTENTS: 
Sounp. 
Rev. S. EARNSHAW on the Mathematical Theory of Sound ......,..++ mes ase taupes 
METEOROLOGY. 
Mr. W. R. BowpirTcu on the Formation of Hail, as illustrated by Local Storms 
Mr. J. Park HArrrson, further Evidence of Lunar Influence on Temperature 
Professor Hennessy on the Decrease of Temperature over Elevated Ground.. 
on the Heating of the Atmosphere by Contact with the 
Barth’s Surface .....scseresesceseesereneeeesereteensenenerens eee SepP earn ester : 
Colonel Jamus’s Note on Refraction sesssscseceeseerssncesseenseteenessenens cececeresees 
Dr. Lex on the Daily Comparison of an Aneroid Barometer with a Board of 
Trade Barometer by Captains of Ships at Sea........ agieene Ser ercarererer na eer rer 
Mr. F. Osxer on the Construction of a Portable Self-registering Anemometer 
for recording the direction and amount of Horizontal Motion of the Air....., 
Rev. T. Ranxin’s Meteorological Observations at Huggate for 1857 .......+++ a 
Dr. F. A. SrnzEstROm’s Note on Observations of Temperature...,......... Rr 5 
Colonel Syxes on the Desirableness of renewing Balloon Ascents in England 
for Meteorological Objects......ss.sssseseereeesesenenees Ficteniasananacacden adseapatieidse ; 
Mr. G. J. Symons on a New Construction of Standard Portable Mountain 
Barometers ....+.+sseseeseeee SERRA ReR rence teen skeie  aenveaiae Pern etry 
Professor TyNDALL’s Particulars of an Ascent of Mont Blanc....ccssssseseeeevees 
Mr. J. Wouey on a fresh Form of Grgalallization which ke plac in the 
Particles of Fallen Snow under Intense Cold .........4. 
INSTRUMENTS. 
Mr. Warranp Caruizez on Dials which give the Latitude, the line <i North 
and South, and Chronometer Time.......... aban dence cg evdadentea! aartien 
CHEMISTRY. 
Address by Sir J. F. W. Herscue , President of the Section......cssseserersees 
Mr. J. Beprorp on Colorific Lichens ..c..cseecesseseoeees eadasetaadda) he cetazece sebeas 
Dr. C. W. Brnexzy on the peculiar action of Mud and Water on Glass, as 
more especially illustrated by some Specimens of Glass found in the Lake at 
Walton Hail, near Wakefield, the residence of Cuartes WaTERTON, Esq... 
Mr. F. Crace Catvert on the Expansion of Metals, Alloys, and Salts...... 
Dr. J. Baker Epwarps’s Note on Nitro-glycerine and other Xyloids..... 
Mr. R. J. Fowxer on a Process for the Estimation of Actinism .....-.s.ssssesees 
Mr. Atpuonse Gaczs on a Method of Observation applied to the study of 
some Metamorphic Rocks; and on some Molecular Changes exhibited by the 
action of Acids upon them...........se000 sani es ata ets Pah cas aah baute uncer saceesin rs 
—————_—_—— on a new variety of Pyro-electric Wavellite.............+++ 
Mr. J. P. Gassior on Electrical Discharges as observed in highly rarefied Car- 
bonic Acid in contact with Potash.......scssssssecseeeeeers Foe RPS tee te 
Dr. J. H. Grapstone on reciprocal Decomposition between Salts and their 
IN EIA SOWNGRES. candy ea run asth ua shite “EQUIids pAvinanoaac dens Seatas seat aad had 5s Y= adck Pea ra 
Mr. Grorce Guapstone on a remarkable Deposit of Carbonate of Lime about 
_ Fossils in the Lower Lias of Dorsetshire.....cocssssecseeesers jjecdavecdevevQlelase 
41 
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