CONTENTS. 
—_——— 
NOTICES AND ABSTRACTS OF MISCELLANEOUS 
COMMUNICATIONS TO THE SECTIONS. 
MATHEMATICS AND PHYSICS. 
Professor WuEatsTone on a means of determining the apparent Solar Time by 
the Diurnal Changes of the Plane of Polarization at the North Pole of the 
RIRY acces sss: Pa oR Ee USe Rath, Soba. Gg neta an eRMMesae UAGe seta nwe seuss Cehawscds spanwenedsicas 
Mr. Joun Batt on rendering the Electric Telegraph subservient to Meteoro- 
logical Research ....... Ween cates tescacdere rarest teecescsseccertitheeseCenceukaneesaseve 
_ Rey. J. Cuaxtts’s Description of a New Instrument for observing the Ap- 
parent Positions of Meteors (in a letter to the Assistant General Secretary) 
Mr. Mansrretp Harrison on a Self-Registering Thermometer (in a letter to 
BE Profs PHILDIPS) vesvisvvervecesvasvesver ssvisuedsuectesswersvesdensestebccsebeedsnstbedatee 
Mr. J. W. Cuiipers’s Comparative Temperature Table, showing the daily 
average height of the Thermometer ; at Jersey, in 49° 11" N.; at Torquay, 
50° 30" N.; Hastings, 50° 52" N.; and London, 51° 30™ Nussecssorssastscsas 
‘Extracts on | a Letter to Professor WuHEatstongE, from J. D. Hooker, M.D. 
Sir W. Snow Harris on a General Law of Electrical Discharge......... ee 
Mr. J. P. Joutz on the Mechanical Equivalent of Heat and on the Constibas 
tion of Elastic Fluids ...isssccsesseseecesseenseees sia ncdicasacebureienekbeseik Kakthnenwanseals 
_ Mr. Joun Jenxins’s Notices of Aurore observed at Swansea.ss.ss.ssscseee evens 
- Tables of Meteorological Pheenomena observed at Swansea 
iA Dr. Joun Lez on Meteorological Observations continued at Alten in Finmark 
r Mr. J. F. Coxn’s Observations upon the Meteorological Observations for 1846 
___ and 1847 from Alten in Lapland (in a letter to Dr. Lee) ......... See 
Mr. Marruew Moceripcz on two cases of uncommon Atmospheric Refraction 
Lieut. Maury’s Observations accompanying Wind and Current Charts of the 
™ North Atlantic Paces eeceeereesesens SOs everesceseecnecccres® Pebeeeedenarorevessetesenstoiane 
Mr. Tuos. Rankin’s Meteorological Observations at Huggate for 1847......... 
Rev. H. Luoyp on the Mean Results of Observations..........cecesreseees Lo eecapincs 
Herr Pricker’s Account of Experiments saan bye to a new Magnetic 
ACHION .......cscsedessbonedcnesssersens SA ssp Onid'ls Henn oospabil ordi peeceserceneanecseccosenyse 
Rev. Prof. Paeaae on an Explanation of the “ Beads” and ‘‘ Threads”’ in 
RUMMINRE PCCD SC Beant eccltohdee>ootndupaoatscnchceneveacantearsanepssasst enon paasiiageas 
on a new Case of Interference of Light............ccesseseeeees 
’s Collected Observations of the Annular Eclipse of October 
SRN RGA fe wevenstecs) sedatsekicecdsseccscnceass coe TariesRsaph oteasecet acne sntiscse tas dcewet scien s 
Dr. StzsEsTRém on those Variations of the Force and the Direction of the Ter- 
restrial Magnetism which seem to depend on the Aurora Borealis ............ 
_ Mr. G. G. Stoxzs on a Difficulty in the Theory of Light......s0scsscseuseseees 
..——— on the Refraction of Light beyond the Critical ela ubesiees 
on the Perfect Blackness of the Centre of Newton’s Rings 
—<——_— on the Resistance of the Air to Pendulums........ petacteate ee 
_ Prof. W. Tuomson on the Equilibrium of Magnetic or Diamagnetic Bodies of 
any Form, under the Influence of the Terrestrial Magnetic Force..........0++6 
: a on the Theory of Electro-magnetic Induction............+0604 
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