Foreign Literature and Science. 199 
the Royal Academy, consisting of Si Thenard and. 
Gay-Lussac.—Annales de Chimie, Aug. 182 
- The power of conducting Electricity, is possessed by 
Ye ieeae metals, in the order and ratio of the numbers 
ammesed to each. 
Copper 100 
old 93.6 
Silver 73.60 
in 28.50 
Tin 15.60 
a 2 
Iron 15.80 
Lead 8.30 
ercu = 3.45 
s ESS 
Potassium 
Memoir of Brcqueret.—Idem. 
27. Solar Spots.—It is admitted by the careful and scien- 
tific observers of meteorological phenomena, who register 
their observations in the journals of the royal observatory of 
Paris, that the comparison of the spots of 1825 with the 
temperature, seems to confirm the opinion of some distin- 
guished philosophers and astronomers, that the appearance 
of solar spots is am indication of an abundant emission of 
light and heat. The spots, during the past year, have been 
very numerous, and it is well known that the temperature 
was uncommonly high. They justly remark, however, that. 
ow multiplicity of causes which modify the temperature of 
earth, is so great and so various, that isolated results can 
never lead to certain general conclusions. It is only 
combining, in a suitable manner, long series of observations, 
that the immediate influence of the spots can be duly appre- 
ciated. — Annales de Chimie, Decem. 1825. 
28. Electro-mugnetism.—In a memoir by D. CoLLapon, 
read at the Academy of Sciences, (Paris) on the 21st of Au-- 
gust last, it is fully shewn that deviations of the magnetic nee- 
dle, precisely similar to those that are produced by the Vol- 
taic current, may be obtained by common electricity. He 
made use of a ees. formed by 100 turns with two . 
= agreeably to the plan of M. Nobili. The wire was 
bly covered with silk, to insure its perfect insulation. 
