Vol. 58. Philosophical Magazine. August 1821 



%M Contents of Number 280. 



^^^S XVI. On the Problem in Nautical Astronomy for finding 

 ^^^ the Latitude by Means of two Observations of the Sun's Al- 

 '^Jiwtitude and the Time elapsed between them. By James 

 iWlvoRY, A.M. F.R.S. . - - - - Page 



XVII. On the aeriform Compounds of Charcoal and Hy- 

 drogen ; with an Account of some additional Experiments 



^^ on the Gases from Oil and from Coal. By Wm. Henry, 

 ^|j;'JM.T). F.R.S. - - - . . . - - 



XVIII. On the Discovery of a North-west magnetic Pole. 

 By Colonel Mac DOHALD. -.--.. 



^^ 'XIX. Answer to « Re;-narks on Mr. Riddle's Claim to 

 ^jS^ the Invention of a new Method of determining the Latitude." 

 <^^'S^1 By Mr. Edv/ard Riddle. ....-- 

 V?-i!('| XX. A Communication of a singular Fact in Natural 

 r'"^ History. By the Right Honourable the Earl of Morton. 



f 



'B 



103 



105 



108 



5^' ij;^ XXi. Particulars of a Fact nearly similar to that related 



'<~^^ by Lord Mori o.v. ..... 106 1 



|r>^^;?;| XXII. On the Use of Shot Cartridges. By A Corre- 

 vV;;i*j spoNDENT in India. 



li^'^t'^ XX ill. Report of a Committee of the Academy of Na- 

 tural Sciences of Philadelphia, on a new Hydrostatic Ba- 

 y.^-j.^ lance invented by Isaiah Lukkns. - - 



Jj^^N^ XXIV. Description of a Hydrostatic Balance, by which 

 ^^.>^| tho Speciiic Gravities of Minerals may be ascertained with- 



pi;'><0' out Calculation. By Benj. H. Coates, M.D. 



fij cca XXV. True apparent Right Ascension of Dr. Mask e- 

 ifj,U% lyne's C>6 Stars tor every Day in the Year 1821. 

 V^ XXVI. Notice respeciing a Volcanic Appearance in the 

 ifi-vlMoon. By CiptainHENRY Kater, F.R.S. - -" 

 %,.,;'J XXVil. The first Portion of a Catalogue of 1800 zodia- 

 li:'.V>f cal Star's, for the Epoch of January ], 1800; from the Works 

 ^ijilfeof Pi Azz I, Bode, and others, with illustrative Notes. - - 114. j 

 aC^ XXVIII. On the Appearance of Meteors as Prognostics 

 ^<j.; ^\ of Wind and Rain. By Dr. W. Burnf.y. 

 %< ^YJ XXIX. A Rofutarionof Mr. Herap AT h's Mathematical 

 1^1?' Inquiry into th>; Causes, Laws, &c. of Heat, Gases, Gravi- 

 iJI'^s^ tation, &c. By Mr. Thomas Tredgold. 

 W^^0 XXX. Application of the Calculation of Probabilities to 

 ijV;^^ the geodesic Operations of the Meridian of France. By 

 ^^Count De Laplace. . . . - - 



^^M XXXI. On promotirg the early Puberty of Apple and 

 J^M l^t-'av Trees when raised l*rom Seed. By J. Williams, Esq. 

 MS^ XXXU. Contribution to the History of Electricity. By 

 ^p^S>. A Correspondent. ..... 137! 



'^^jj XXXIII. Observations on Sir Everard Home's Paper 

 ^ on the black Rete mucosum of the Negro. 



XXXIV. Notices respecting New Books. . - - 



XXXV. Proceedings of Learned Societies. 



XXXVI. Intelligence and Miscellaneous Articles. 114— 160 1 



RICHARD AND ARTHUB. TAYLOK, PRINTERS^ SHOE LANB^ LONDON; 



