CONTENTS. 
NOTICES AND ABSTRACTS OF MISCELLANEOUS 
COMMUNICATIONS TO THE SECTIONS. 
MATHEMATICS AND PHYSICS. 
P»Ke 
Mf. George Boole on a Method of definite Integration . ^ 
M. Borchardt aurle Principe du dernier Multiplicateur dans les Problemes de 
MecanUjue . . .. . . . ^ 
IWedsor CuALLis on a new Theory of the Polarization of Light . . 1 
M. Davidow on the Tlteory of ICquUibrimn of Floating Bodies . .. . I 
^ W. R. Hamilton on some Applicationa of the Calculus of Quaternions to 
tl*e Theoryofthe Moon... . .. . ^ 
Sir Vi. R. Hamilton’* lixainple of an Iso|.erimetrical Problem treated by the 
Caknltts of Quaterniono.... . . ... . . “* 
Pnrfmor Jakrbtt on the Summation of certain Circular Functions . 5 
B. PnicB on anew Proof of the Principle of Virtual Velocities ..y 5 
Mr. W, Spottibwoodb on the Fumlamental haws of Motion ami Equilibrium 5 
Mr. G. G. Stores on the Rewstanee of a Fluid to two Oscillating Spheres...... d 
I^'f. W. Tuomsos on Electrical . ... . ^ 
Mr. J. C. Adams on some Results of a new Calculation of the Perturbations of 
Inwiubythe Planet Neptune. . .. .. ' 
'™f-CuEVALLiBtt on a Graphical Method of computing an Occultation. 7 
I'ousTRk on Meteors . . . ® 
Mf- JoMH Groobv on the Moon’s Atmosphere ...... . ® 
f- HeNny Lawson on Spots in the Sun . . . ^ 
W. LuBnocR on the Calculation of the Perturbations of Planets and 
tometA . ... y 
**^f- Powell’s Lecture on Shooting Stars, delivered at the Evening Meeting m 
^ Radcliffe Library. June 24 , 1847 . 
• I owell on Periodic Meteors . j, 
“—on the Eclipse of October 1847 . | 
" on a singular appearance of tlic shaded part of the Moon on 
of March 18 . . . 
^' - -'s Meteorological Observations at Huggate . . . 
IW t 0 ” a Triple DilFcrcutial Wheel.. . . 
^•UvEMUR 8ur les Corafetes P6riodiques dc Lcxel de Faye et de Vico . . ' J 
■ • A. Broun on some Account of Observatious miwle at the ® 
Sir T. M. Brisbane, to determine the variations of the laws of ler- 
_ ^ Magnetism with respect to height iu the Atmosphere . !' 
-- the Diurnal Motion of a Magnet freely suspended m tne 
of magnetic dip .. . . .V'." 
Discourse on the Magnetic Condition of Matter, delivere in 
M, «. "*treon Friday eveiuag. June 25 , 1847 . . Z 
nxHVov.- outheEristenceofalternatingdumralCurren^ 
variaf the terrestrial surface, and their connexion vri 
Mr.T Magnetic Needle . 2 J 
f-uxANDER Bain on Electric Clocks . .. .. . 
