414 Scientific Intelligence. 
occasion to observe it especially, to be wnaltered in the air. Thus 
Lehmann, Physiological Chemist ; Gorup Besanez, Zoochemische Ana- 
except in summer weather, it is not visibly affected by atmospheric 
moisture, 
- Spectrum of Cesium—Johnson and Allen, in the paper above referred 
sen, in figure given by them 
(Pogg. Ann., 1861, and Fres. Zeitschrift fiir analyt. Chemie, Heft 1,1862), 
represent 11 lines. We find without difficulty 7 more lines, and observe 
farther that some of those figured by K. & B., are not mapped in their 
correct position.” : 
In relation to this, Bunsen remarks, “we regret that Messrs. J. & A. 
appear to have neglected to make an accurate comparison of rsgrebe 17 
ves 
trum with ours, otherwise they would have easily convinced th | 
that the lines given by them agree with as closely as is possible: 
that on the hand three lines are figured on our plate which do not 
_eecur at ail in the cesium. um. These li 
a number of lithographs by walcor the lithograpt 
, 
. 
lines have been printed on 
