CONTENTS. 
NOTICES AND ABSTRACTS OF MISCELLANEOUS 
COMMUNICATIONS TO THE SECTIONS. 
‘MATHEMATICS AND PHYSICS. 
Page 
Professor Youne on the Principle of Continuity in“reference to certain Results 
Of Analysis ....cscccsceeceeeeeereee Reskicsiiawaebent = ways epak «= ded Sandia evpleerhemerian cave 1 
Professor OrrsTED on the Deviation of Falling Bodies from the Perpendicular 2 
Professor PowEuu on certain Cases of Elliptic Polarization of Light by Re- 
fleXION ........sceceeeee 5 Pere Becondet see Reais easeneean aicee Seneesicsbe nang esunaaee 3 
— on the Bands formed by partial Interception of the Pris~ 
Matic Spectrum ......ssceeeseeeees Rcltuadantedelcabicbiesnieesae seats tataawendoss=veeusecsdens 4 
SS SSS on attempts to explain the apparent projection of a Star on 
the Moon ............. ppiddakouhaas oe siddsoupenmasus selene reataeandecs Mhatdsaney es Sepisinpenin teen a 
Mr. Daze on Elliptic Polarization ..........ssscsesesseeceneccueeeees iSvadtada sesh tieeas 5 
Sir Davip BrewstTeEr’s Notice of a New Property of Light exhibited in the 
Action of Chrysammate of Potash upon Common and Polarized Light ....... i 
Dr. Greene’s Description of a Portable Equatorial Stand for Telescopes with- 
out Polar Axis........ Hpeaeo serene ce = Andee dualaalcobloubvuriceabeehoweciee ea ee 8 
Mr. Henry Lawson on an easy pat of contracting the Aperture of a 
Mare Telescope’! Lis.) idec bes ties cdeaede ecaeateasweevecevevedwewesvivaneses dan cel eteads 9 
on the Arrangement of a Solar Eye-piece .........sseeeeees 9 
Mr. F. Ronatps on the Meteorological Observations at Kew, with an Account 
of the Photographic Self-registering Apparatus ...ccc..ecesscseeeseeasees peepee 10 
Professor WARTMANN on some Meteorological Pheenomena ............+..40+ Se re illp! 
Dr. Banks on a New Anemometer ...........ccccesseeeceersetneeseeveseeeesees ery 12 
Capt. W. W. CuitpErs’s Meteorological Observations ...........sseeeeeee ecactis 13 
Rev. T. Ranxrn’s Notices of a Halo, Paraselene and Aurore Boreales ......... 15 
Rev. W. WHEWELL’s Method of Measuring the Height of Clouds ............... 15 
Capt. SHoRTREDE on the Force Of Vapour.......,.csssecsseenessesessenceecececesecees 16 
Mr. G. Dottonp’s Account of an Atmospheric Recorder.......cssecereesessecseeee 17 
Mr. C. Brooxe on the Construction of a Self-registering Barometer, Thermo- 
meter, and Psychrometer ......+ Bdsddacs vide pda sewed wae Rowine 4 ad asia a bicdvwcacsee 17 
Mr. J. F. MituEr’s Table of the Fall of Rain in the Lake Districts of Cum- 
berland and Westmoreland, &c. in the Year 1845 ..........06 eean Seah Uidadaeee 18 
——— Readings of Mountain Gauges, June, July and August - 
1846........ Peeeeeeeseeeseesesesee @eeersesseree SCeeeeseeseseseeesese eeeeeetsesaseses COC CCC eeeeee 21 
Lt. Colonel Syxzs on the Fall of Rain on the Coast of Travancore and Table 
Land of Uttree, from Observations of M. General Cullen .........ssececoeesssees 22 
_ Mr. E. J. Dent on a New Portable Azimuth Compass............ Sescntheoecnande (EE 
