408 Scientific Intelligence. 
SCIENTIFIC INTELLIGENCE. 
F I. PHYSICS AND CHEMISTRY. 
Paysic 
YSICS.—~ : 
1. Photographs of Spectra exhibited to the Chemical Section of the 
British Association ; by Prof. . Mitier (Chairman). He remarked: 
{including platinum, gold, silver, copper, zinc, aluminium, ma 
iron), w k was tak i 
utes upon a sensitive collodion surface, scarcely a trace of any acto f 
procured; whilst, in five minutes, in the air, a powerful imprest 
numerous bands was obtained. It is remarked by Mr. Talbot that, in the 
tra of colored flames, the nature of the acid did not influence oy 
position of the bright lines of the spectrum, which he found was oT 
h een Cc 
ent upon the metal employed, and this remark had been confirm 
hypochlorous acid, although a strongly colored vapor and containing the 
same ts, oxygen and chlorine, produced no absorptive bands. 
