CONTENTS 
OF THE FIFTY-EIGHTH VOLUME. 
ON ihe Mean Density of the Earth... 3 - «3 
On Light. #5 <5 bi I o2 or as 
Answers ly Dr.W. Burney to the Queries proposed by Joun 
Farey, Esq. Sen., in Phil. Mag. for June, respecting Shoot- 
ing Stars and Meteors. ate hd a 22 
Remarks on the Gradation of Heat in the Atmosphere. 24 
On the black Rete mucosum of the Negro being a Defence 
"against the scorching Effect of the Sun’s Rays. Spal 
On the annular Eclipse of the Sun which will happen on the 
15th of May 1836; being the principal Results of Cal- 
culations for Greenwich and Edinburgh. .. -«- 34 
Remarks on Mr. Ripp.x’s Claim to the Invention of anew Me- 
thod of determining the Latitude. .. ie we 0 
On the magnetic Phenomena produced by Electricity... 43 
True apparent Right Ascension of Dr. MasKELYNE’s 36 Stars 
for every Day in the Year 1821. -- . 90, 110, 195, 262 
On the Glow-worm. Ay ate or od ae ee 
Remarks and Suggestions, as to the State and Progress of the 
Government Trigonometrical Survey, with regard to the Di- 
mensions, Figure and Structure of the Earth. Woe oad 
Hints for the approaching Harvest. .. ri vane OR 
On the Problem in Nautical Astronomy for finding the Lati- 
tude ly Means of two Observations of the Sun’s Altitude 
and the Time elapsed between them. .« +s oe axe 
On the aériform Compounds of Charcoal and Hydrogen; with 
an Account of some additional Experiments on the Gases from 
Oil and from Coal. 4 ar a oc Oo, hos 
On the Discovery of a North-west magnetic Pole. oe 99 
Vol, 58, No, 284. Dec, 1821. a An- 
