Vol. 58. Philosophical Magazine. 



July 



Contents of Number 279* 



I. On the Mean Density of the Earth. By Di-.Charles 

 HUTTON, F.R.S. - - - - 



It. On Light. By Andrev/ Ure, M.D. Professor of the 

 Andersonian Institution, Glasgow, . - - - 



III. Answers by Dr. Wm. Burney to the Queries pro- 

 posed by John Farey, Esq, Sen., in Phil. Mag. for June, 

 respecting Shooting Stars and Meteors. - 



IV. Remarks on the Gradation of Heat in the Atmo- 

 sphere. By James Ivory, M. A. F.R.S. . - . 



V. On the black Rete mucosum of the Negro being a De- 

 fence against the scorching Effect of the Sun's Rays, Bj^ 

 Sir Everard Home, Bart. F.R.S. - . - 



VI. On the annular Eclipse of the Sun which will happen 

 on the 15th of May lS3f); being the principal Results of cal- 

 culating for Greenwich and Edinburgh. By Mr. George 

 Innrs. - - . , - - . 



VII. Remarks on Mr. Riddle's Claim to the Invention 

 of a hew Method of determining the Latitude. 1 



VIII. On the magnetic Phjenomena produced by Elec- 

 tri<:ity-; in a Letter from Sir H. Davy, Bart. F.R.S. to 

 W. H. WOLLASTON, M.D. P.R.S. 



i.%. True apparent Right Ascension of Dr. Maske- 

 LYNt's 36 Stars for every Day in the Year 182L By the 

 Rev. J, Gkooby. - - - - - 



X. On the Glow-worm. By Mr, W. Roger son, Jtin. . 



XI. Remarks and Suggestions, as to the State and Pro- 

 gress of the Government Trigonometrical Survey, with re- 

 gard to the Dimensions, Figlrrc and Stratum of the E-arth. 

 By Mr. John Farey, Seji. - - - - - 



XII. Hints for the approaching Harvest. 



XIII. Notices respecting New Books. - - - - 



XIV. Proceedings of Learned Societies. - .. . 



XV. Intelligence and Miscellaneous Articles : — Manga- 

 nese. — Aeronautic Ascension of Mr. Green in Honour of 

 His Majesty's Coronation.— Report relative to the moving 

 Bog of Kilmaleady, in King's County, made by Order of 

 the Royal Dublin Society, — The Northern Expedition. — 

 List of Patents for New Inventions. — Barometric Observa- 

 tions. — Meteorology. - - - - - 67- 



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31 



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40 



50 jw., 

 53 |;f^: 



-80 ^;:. 



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

 Pickett-Place, Temple Bar, will meet with every attention. ^^CT 



ftlCHARD AND ARTHUR TAYLOK, PIUNTERS, SHOE LANli^ LONDON. 



