412 Scientific Intelligence. 
and belongs to both magnesium and iron. Calcium has three strong 
lines at the. violet end of the spectrum, of which two correspond 
Hi lines, and the third in order forms with one of the iron lines the above- 
mentioned strong double line. Calcium has also six lines coinciding with 
lines of the G group, three between G and F, and groups of fine lines at 
E and between Eand G. Aluminum exhibits two strong lines pi 
lines between H and G which appear to correspon . 
the strong blue strontium line between G and F has no correspon 5 
line imthe-solar spectrum. The author assumes further that the ineY | 
belongs to hydrogen. An interesting discussion of the theory of a 
mometric heat concludes Angstrém’s memoir, which, it must be er 
bered, although first published in English in July, 1862, in reality PRY 
ceded the important memoir of Kirchhoff.—Z., E. and D. ae pas a 
one has observed 
.—GLapst of the fame 
