ibe AMERICAN 
JOURNAL OF SCIENCE AND ARTS. 
[SECOND SERIES.) 
Asin. I—Rescarches on the Radiations of Incandescent Bodies, 
and on nv Elementary Colors of the Solar Spectrum ; by M. 
Metuon1.* 
and radiant heat. In dim SE this interesting work, several ideas 
have presented themselves to me, which I have oben to the 
test of experiment. I believe that an analysis of the memoir of 
Mr. Draper, accompanied with a brief account of what I have 
done, will not be without interest to the readers of this Journal. 
Every one knows that heat, when it accumulates in bodies, at 
renders them incandescent ; that is to say, more or less lumin- 
ous and visible in the dark. Is the temperature necessary to pro- 
tuce this state of incandescence always the same, or does it vary 
wi = be nature gf the body? In either case what is its degree ? 
ane is the succession 7 colored lights, emitted by a given 
, When brought to temperatures more and more elevated ? 
HV, what j is the Olakon that subsists at different periods of 
escence between the hemp eie ant ite eee of Hohe 
and oly eat emitted by a body? 
tsllilabeadeasbaiil 
| ral Academ f Seinen at Naples Jo ly 6th, 1847, and trans. 
ee ue Uni i versel selle of nat Nees hss th t, 1847. 
1847, 5 ide gh Pe is Journal, we i 
