Vo 



L. 56 



Philosophical Magazine. Sept. 1820. 



CON^TENTS OF NuMBER 269. 



XXVI. A Review of some leading Points in the Official Page\ 

 Character and Proceedings of the late President Of the ■ 

 Royal Society. By A Correspondent ... Igl 



XXVII. An Attempt to explain the Pha5r,araenon known 

 by the Name of the Aurora Borealis. By Mr. William 

 DoBBiE. - - . - - 175 ^ 



XXVIII. Description of the Percussion Gun-Lock "in- 

 vented by Mr. Collinson Hall, of High-street, Mary-le- 

 bone. - - '. . - i83 



XXIX. Particulars respecting the Pancratic Eye-Tube 

 invented by William Kitchiner,M.D., Author of" Prac- 

 tical Observations on Telescopes, Spectacles," &c. &c. made 

 only by Dollond, London. ... - 186 



XXX. Description of the Moo;ring Blocks now used in 

 Portsmouth Harbour. By Mr. J. Park, of Portsmouth. 188 



XXXI. Electricity and Galvanism explained on the irte- 

 chanical Theory of Matter ar,d Motion. By Sir Richard 

 Phillips. - - - 



XXXII. The Bakerian Lecture. On the Composition 

 and Analysis of the inflammable gaseous Compounds re- 

 sulting from the destructive Distillation of Coal and Oil, 

 ivith some Remarks on their relative heating and illumi- 

 nating Powers. By William Thomas Br.ande, Esq. Sec. 



M R.S. Prof. Chen-. R.L 



SCO. 



w 



XXXIII. Remarks on a Nev/tonian's " Observations 

 on the Phrenomena of the Universe," published in the Philo- 

 sophical Magazine for l.nst Month. - - . Q 

 , XXXIV. The Results of Observations made at the Ob- 

 servatory of Trinity College, Dublin, for determining the 

 Obliquity of the Ecliptic, and the Maximum of the Aber- 

 ration ot Light. By the /Rev. .1. Brinkley, DD. F.R.S. 

 and M.R.T.A. and Andrew's Professor of Astronomy in the 

 University of Dublin. - - - - - 2i 



XXXV. Notici's respecting New Books - -2 



XXXVI. Intelligence and Miscellaneous Articles : — 

 Discovery Ships. — Muriate of Potash in Rock Salt. — ^^Woda* 

 Pyrite.-,. — Analysis of the Piper Cubeba. — Figure of the 

 Earth — Mineralogy. — Lithotomy. — Spontaneous Separa- 

 tion of Warts. — ^.Machine for raising Water. — Leslie's Hy- 

 grometer employed to ascertain the Strength of Spirits. — 

 The Warwick Vase. — Singular Phssnomenon. — Cleopatra's 

 Needle. — Arctic Land Expedition. — Indian Antiquities. — 

 Sol.ir ••Eclipse S(;pt. 7, 1 820.— Extraordinary Circumstance. 

 Meteoiolo;'ical Tables. - - - 226-':40 



.*^* Communications for this Work, received by the Editor, 

 Pickctt-Place, Temple Bar, will meet with every attention. 



RICHARD .-VND ARTHU* TATLOB, TRINTERS, SHOE LANBj LONBON. 



