vill CONTENTS. 
P. 
Professor C. Prazzt SmyTuH on a Proof of the Dioptric and Actinic Quality of 
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the Atmosphere at a High Elevation .........sccccetsecncecsceevnves 
Mr. Batrour Stewart on the Comparison of the Curves afforded by Self- 
recording Magnetographs at Kew and Lisbon, for July 1863 ............ 
Mri J Was wan one Mercurial Air-bPumpetess<seists sclr ene == celan emanate 
Mr. G. J. Symons’s Description of the Experimental Series of Rain-Gauges 
erected at Calne .......... Ahimpradnnenr neti gixo cain aera tants ctiac yo ie. cory 
Mr. W. Symons on a New Marine and Mountain Barometer ...........+.+ 
on a Maximum Thermometer with a New Index.......... 
Professor W. THoMson on the Result of Reductions of Curves obtained from 
the Self-recording Electrometer at Kew ............0sccereuevesocenens 
CHEMISTRY. 
Address by Professor A. W. WiLt1AMson, F.R.S., President of the Section. . 
Professor ABEL on some Results of Experiments on Lucifer Matches and 
others ieaiped By EMeh On 0, 6. i:u nine 0 si ais.niu 5-00 domme weron Sig oe a aS 
Mr. W. Baker on the Impurities contained in Lead, and their Influence in 
ptseNecbnicalldU Sess. > eve te aaah stata joe a Neuei pie Kieu abode desoroucen beadbdorsiuAclole etols 
Ovid Heal LNT +"; selves Sears eater renee: ae ese eb ren betas eyeraseee tenets 
My. R. Catvertr CrapHam and Mr. Jonn DacuisH on Minerals and Salts 
OTM utnAG © Op DLUS css rey ors, s-ayairessarelvt ther sy Glebe of al cbris lovee dees weerees stele aleve ate ainirat ns 
Mivhiests) COND YSON sIsIaTeCtANTS «;.are rials ieivis Oe nre's\y  ehvllewin tbe othr oleate 
Mr. JoserH Cowen, Jun., on Fire-clay Goods ........ ccc ee eee neeeevees 
Mr. W. Crooxes on the Extraction of Thallium on a large scale from the 
lwe-dust ofp yrites-BUTHOLS*. .tcealaiem sien) apuskers 2 clcisle\ cain eis lelertis Ae. Riaieate 
Mr. Duncan C. Datuas on Photelectric Engraving, and Observations upon 
sundry Processes of Photographic Engraving 
Dr. Joun Davy on the Slacking of Quicklime ...........ssseeereeevenes 
Mr. G. Gorr on a new Gas-Furnace for melting Gold, Silver, Copper, Cast 
Tron, Glass, &c., by means of Coal-gas, without the aid of a bellows or tall 
CHAT AS o.com noo OD hin hark aE Deer o Oto BOR esbentigitocta hy tray 
M. L. Kesster on the Commercial Advantages of a new Carbonate of Soda. 
on Glass-engraving by Hydrofluoric Acid .........+00000. 
on a New System of Evaporating Liquids................ 
Mr. H. Kingour, Are Nitrogen and Carbonic Oxide the Oxide of Carbon in 
different Allotropic or Isomeric States? .........cecsceeceeevessvowes 
Mr. C. T. Maine on the Manufacture of Earthenware at Newcastle ...... 
Dr. A. MATTHTESSEN and Mr. G. C. FosTER on the Constitution and Rational 
Honma vor Nave Obes; ssstercaies leis, ciel le aheldlctass diets SEEN area eke ee aa 
Short Communications on Galvanic Copper, Photolithography, and Photo- 
microscopic Specimens, By the Abbé MoIGNO.............. eee eee ees 
Mr. J. Parrryson on a Deposit in the Gas-tubes of the Cleveland Blast Fur- 
TRIG ae in recite recto Ons NOSE NRA RRR MURR AS cyto. 2 once. 
2 Y 
on Zine, Nickel, and Cobalt in the Cleveland Ironstone .. 
on the various kinds of Pyrites used on the Tyne and 
Neighbourhood in the Manufacture of Sulphuric Acid , 
CC 
‘age 
25 
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