iv CONTENTS. 
Mr. Tuomas’s Remarks on Abnormal Tides......... i hoa geeddchddbabe hie uparcmeaceares 
Mr. G. Hurcutison on the Nature and Causes of the Diurnal Oscillations of the 
Barometer ........ PeUsitheOiedet eka dildeseey evietatts cviddteodt wadddatccbbibueseUetceesewess 
Mr. Joun Pricuarv’s Meteorological Register for 1842-43, from Diurnal 
Observations taken at Beddgelert in the county of Carnarvon .........00s..000e 
Dr. Apsoun on the Correction to be applied for Moisture to the Barometric 
Formula ......... acme as\es Eris cneiaisa'stiae dove eee eid fo esi dei pp semana eeneee peers 
Corporal WiLu1am Moves’s Observations with the Thermometer made at Aden 
AMA TAD a Weetey deiakodayateeh aoe ian dst ahs dbs domakit snob deve ndty =e Honfee=khanbassbeheaats 
Rev. Toomas Knox and the Rev. Henry Knox on the quantity of Rain which 
falls in the south-west of Ireland, and in Suffolk, with the wind at the seve- 
ral points of the Compass .eseeessseeeeseeeees sscleh ou aiepesnciasaeealirenemads eee nae 
Mr. E. Hopexinson’s Experiments to prove that all Bodies are in some degree 
Inelastic, and a proposed Law for estimating the Deficiency...........s+eeessses 
Mr. Cornetius Warp on the Principles of Construction adapted to the per- 
fection of the Flute’...ccescisssescsrecesescoscsccees sinadonedeadedsaels eeied's toate toeeevess 
CHEMISTRY. 
Professor C. G. MosanpeEr on the new metals, Lanthanium and Didymium, 
which are associated with Cerium; and on Erbium and Terbium, new Metals 
associated with Yttria.......scsseeeeees aaeseas She A. Riis eee 
Dr. AnpREws on the Heat of Combination.. Je ood ATT eau seeceutebeeaneeree 
Mr, J. P. Jourx on the Calorific Effects of Niagueta: Electricity, and the Me- 
chanical Value of Heat .......... au ctidas ousne¥esebeaayaneus seesessdeecnenndawsmphee inane 
Professor Draper on the Decomposition of Carbonic Acid Gas, and the Alka- 
line Carbonates, by the light of the Sun. .......0.....cc.cccesscecscvevcsaservecsectee 
Mr. R. Hunt on Chromatype, a new Photographic Process ......scsesseseesesssees 
— on the Influence of Light on the Growth of Plants ............008 
on the Influence of Light on a great variety of Metallic and other 
Compounds ......... ephseestites deensred suey cewae Sstaee as anne aeeseet seocctavans Reneat 
Dr. Apsoun on a new Method of testing the Hygrometric Formula usually 
applied to Observations made with a wet and dry Thermometer ...ss0...+0+40 
7s Remarks on the Chemistry of the Arsenites .........sssseseeraes 
Abstract of a Letter from Dr. Will of Giessen, on an improved Method of ascer- 
taining the commercial Value of Alkalies or carbonated Alkalies, Acids, and 
Oxides of Manganese ......-ssecesecesenerenenes castuanshecsaasetetescauadyc ttaes merce 
Mr. Tuomas Jenntnes’s Chemical Suggestions on the Agriculture of Cork...... 
Mr. R. W. TownsEnp on the Minerals of Cork........sssscesessessees tia coe 
Dr. F. Tamnav on newly-discovered Three-twin Crystals of Harmotome, so 
arranged that they form a regular Rhombic Dodecahedron............+++++ seeees 
Rev. T. Knox on the Relative Electro-Negative Powers of Iodine and Fluorine 
Mr. W. Armstronce on the Electricity of High-Pressure Steam, and a descrip- 
tion of a Hydro-Electric Machine ...cccsccecscesceresseeceseenccesesseseeeeees paclcias 



Mr. A. Booru on the late Fires at Liverpool, and on Spontaneous Combustion 
— on the Chemical Composition of Smoke, its Production and In- 
fluence on Organic Substances ......sesseseeeeeeees PAE ce RE a ee er er - vaothestde 
Mr. Henry Dircxs on the Production and Prevention of Smoke...........+ Thee 
Dr. Picke.xs’s Eulogium on the late Richard Kirwan, LL.D....ccccscersscsreeeee 


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