iv CONTENTS. 
Mr. Georce Roserts on a remarkable Tide in the British Channel, Friday, 
July 7, 1848, as it appeared at Lyme Regis, Dorset ..........scssessseeceseeeenes 
Rev. T. R. Rosinson’s Note on ‘Shooting Stars’ seen August 10, at Armagh 
Mr. J. Scorr Russevu on certain Effects produced on Sound by the rapid 
motion of the observer....+....+se0 Wels oc’enia apie. esvisitebmnge t's cine cow'cns esas aseeabenees 
Capt. Sranuey on the Lengths and Velocities of Waves (extract from a Letter 
to the Rev. Dr. Whewell) .........seesessseees wb SR aig phe ale 8's sles oo anid ante pC SERRE MAGtSE 
Lieut.-Colonel Syxes on the Fall of Rain on the Table-land of Uttree Mullay, 
Travancore, during the year 1846, from observations made by General Cullen, 
Resident dh. LIAVAUCONE co acdacevatalscasvedasicus cdeseatebends ¢o>osedeuess dani aaeumemennae 
on Atmospheric Disturbances, and on a remarkable Storm 
at Bombay on the 6th of April 1848.......2:.cccsssesvecessceccoscecesbnccseevenonsons 
Sir Davip Brewster on the Compensation of Impressions moving over the 
Retina, as seen in Railway Travelling ..........scsecsseseeeenes Si sadbedcededereenades 
on the Vision of Distance as given by Colour..........+..+ 
—_—_ — on the Visual Impressions upon the Foramen Centrale of 
ELE CHLGUIMED a cn ae sxe vaaiake sees ne ect ates aiae dates alesse <katiiens ttecsumttes sent teetaneee tant 
ae of Bishop Berkeley’s ‘“‘ New Theory of 
Wisi 775. Ie Ua eva cee eoleccclscbuescsucabycSubices Mivevesdetvecancads tb caceeeeneente Saneee 
CHEMISTRY. 
Mr. A, CraupEt on the Action of the Red, Orange and Yellow Rays upon 
Iodized and Bromo-iodized Silver Plates after they have been affected by day- 
light, and other Phenomena of Photography...... Renatealeisdee aes aitceacmeneeee ete 
Rev. Tuomas Extey on the Laws of Chemical Combinations and the Volumes 
Of Gaseous DOGlestecirsnssuccaswersces sane neces css ceneessinanes ake vr evaachaeetnnetneeaa ce 
——_— on the Motion of the Electric Fluid along Contin: 
Mr. Jonn Goopman on the Identity of the Existences or Forces of Light, Heat, 
Electricity, Magnetism and Gravitation ..........ceccsecssssessceesecnceeeneceseesenes 
Mr. W. R. Grove on the peculiar Cooling Effects of Hydrogen and its Com- 
pounds in cases of Voltaic [Ignition .........scscsscssessereeecnscceeeneees vdauceseasae 
Mr. JAmzs Hieern on the Colouring Matters of Madder Secked sack cu aeceeien ae as 
Mr. Rosert Hunr on the Influence of Light in preventing Chemical Action... 
Prof. W. A. Mituer’s Analysis of Wrought Iron produced by Cementation 
from Cast Iron......... sdedé> ane bielee aludewigtie.te elon de. Wianaaz hele vk a ananhiaee sgeeeesns 
Dr. Morratt on the existence of Ozone in the y Gece th sagen ddenvaniniy seceunds 
Mr. James Nasmyru on a peculiar property of Coke ......... weoakal sahaeearaeetar 
——— on the Chemical Character of Steel............+. mace talenayhs 
Dr. Joun Percy on some of the Alloys of Tungsten ........sessssceeseee wvcedtaabas 
Mr. R. Puiiirpes on some Properties of Alumina.s........cceceseee Saves desbeasennians 
Mr. W. B. Ranpanu on Common Salt as a Poison to Plants ..... Ae AF y AS. 543 
Prof. R. E. Rogers and Prof. W. B. Rogers on a New Process for ae 
Graphite, Natural and Artificial...... See ATE AE Wee eka es See occas id Ueepomat te eee 
———_— —_— —_— ——_ —_-———— _ on the aieanptios of Carbonic 
Acid by Sulphuric Acid......... dics watancvevsiawadeba euiriia ses catecuces soecesvas seswaeses 
Mr. J. Tennanv’s Notices of Pseudomorphous Crystals from Volcanic Districts 
Of INCA Sees wanes sractesec obuaeds a shich oot dachbeeeseebene Fouide ddan sles snabe due Seu aey -peeeaeus 
Mr. W.S. Warp on a Galvanometer........... ob edhenedd coaschleiddbcddectucnteteanes's 
— on the Electromotive Force, Dynamic Effect and prog ge of 
various Voltaic Combinations.............+ deevensaaerecuselcusTavneeveeedsauieM@eseues 
Mr. Francis WuisHaw on the Chemical Composition of Gutta pondiein 
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