iv CONTENTS. 
Professor W. Tuomson on the Theory of Magnetic Induction in Crystalline 
δἰ οι τὴς ΡῈ δοο.οοοοοοοοσον 
Mr. Joun TYNDALL on the Magneto- Optical Properties of Crystals. 
Astronomy, Mereors, WAVES. 
Professor CHEVALLIER on a Sidereal Clock for showing the Arc of Right Ascen- 
sion directly ........+++ Sawh sc weesecerctneedscaneg FOAL ete bO ted UL Pe eMac cctid 
Mr. James Ὁ. Forses on the alleged evidence for a Physical Connexion between 
Stars forming Binary or Multiple Groups, deduced from the Doctrine of 
Chances ...... 02... ΝΣ sepa ἐφ, ὀφονλον, οὐ οἰσαοα τον τον αν εν 
Mr. Henry HENNEssY on the Distribution of "Shooting Stars in the Inter- 
planetary Spaces........0+sesesssseveee Swap eaeermigae ἘΠ .--ς- 
Mr. James Nasmyrtu on the Structure of the Lunar Surface and its relation to 
that of the Earth........ ἜΑ Dac ΕΣ ΜΈΡΗ reece sdigecth ΚΕΥ πγγΠ|.. ονοον 
Dr. W. Scoressy on Atlantic Waves, their Magnitude, Velocity, and Phe- 
nomena ....... Ruugeteraastna ΑΒΗ HA OCDE CAE mae asi yaeee Beordoncrece oe 
Professor Smyrn ¢ on Ἢ Cometary da SIC beaabice> ss wasadeaene ἐν τ ccas Mey τ 
— ’s Account of the Edinburgh Observatory...... ta eeececsenecscecenes 
METEOROLOGY. 
Mr. J. A. Broun on the Attempts to resolve the Pressure of the Atmosphere 
into two parts, that of Vapour and Dry Air............0..+ ν ἐδὼ οὐ σὲ sascneeven patel 
Mr. Perer Crare on some extraordinary Electrical Appearances observed at 
Manchester:on:the:16th of July 1850.12.00 c.cdevececestsecovceccososccencossecs ape 
Mr. Ricnarp Epmonps, Jun., on Remarkable τ τ ΝΞ πο at or 
near the Moon’s First Quarter during the twelve years 1839-1850......... tae 
Mr. Tuomas Hopkins on the Causes of the Rise of the Isothermal Lines (as 
represented on Professor Dove’s ms in the Winters of the Northern 
Hemisphere............- Gitactievemiteese coe inact’ Pepe τος ρου κτίριον, πε ας ενουθενε 
on the n means of computing the Quantities of ‘Aqueous 
Vapour in the Atmosphere at various places and heights ..........2+..0++ *Coten 
on the Daily Formation of Clouds at Makerstoun — 
Dr. Joun Lez on Meteorological*Observations made at Kaafjord, near Alten, 
in Western Finmark, and at Christiania in Norway ..........ssecssseseseceecneees 
on the British Meteorological Society ...... sicrweceasass eos veceddseds 
Rev. C. F. Lyon on some Phenomena of Mirage on the East Coast of Forfar- 
ἘΠ ΓΘ ac ices t νος ἤνοϑ ταν cuddedenanddsitsapet vee. eosecwereettnccs eve σον ΡΤ sees nb ade τσ 
Rev.T. RANKIN on Meteorological Phzenomena at Huggate, Yorkshire, for 1849 
Mr. R. Russet on the Passage of Storms across the British Islands............ 
Lieut. Stracury on Hourly Meteorological Observations made in Thibet at an 
elevation of 18,400 feet............+ ΣΡ ΡΣ ΤΟΝ 
Lieut.-Col. ὅΥ ΚῈΒ on Indian Hail-Storms............0ssseeeeeeseeeees caves Sevoanhtanas 
Mr. Τ᾿ Spencer WELLS’ Observations on the Climate of the eee of the Nile 
Dr. C. Martins on the Six Climates of France.....-.cscssseceeesseceeessseeees 
CHEMISTRY. 
Dr. T. ANDERSON on the Action of Oxidizing Agents on certain Organic Bases 
----------------- on a Compound of Iodine and Codeine ..... Στ τ τς. 
Professor Buckman’s Remarks on some Chemical Facts connected with the 
Tessellated Pavements discovered at Cirencester.............. Gevubavanbbe cuevebers 
Mr. DucaLp CampseE tt on the Action of the Soap-test upon Water containing 
a Salt of Magnesia only, and likewise upon Water eaegy 2 a Salt of Mag- 
nesia and a Salt of Lime.......-+......0068 ΕΗ ἘΣ οι Ὁ. υδο νον νοι δι ἐσόρ δδτάον 
Professor CHapMAN’s Remarks on the Isomorphous | Relations of Silica and 
Alumina <ie ΤΟΝ so see τ πριν τι τενκυ τους aieo seeks te ape  ἀοτς σπουτοος, .. τ 
Dr. Joun Davy on the Incrustation which forms in the Boilers of "Steam- 
Engines, in a Letter addressed to Dr. George Wilson ......csssssecscseeeeeeteeeee 
Mr. J.P. Gasstor ona pci Form produced in a Diamond when under the 
Influence of the Voltaic Arc.............5.. senceavaeseasstens teases ates 
ΟΣ 
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