Humboldt Foundation.—Photography by Carbon. 429 
might also mention napthaline, benzoin, and other mpremaiions 
and dgpete radicals. 
We see that this group of bodies characterized by a peculiar odor, em- 
braces those elements which, like sulphur, arsenic and phosphorus, are 
enya se odor, _— is, their odor is manifesto only in combination. If 
of velit, althou ugh as a general thing the odor of most bodies is de- 
veloped when they are volatilized. 
odors. This element possesses a above all other substances the peculiar 
property of developing odors even with odorless bodies, as N, C, Se, Te, 
P, &c., and a great number of compounds, of these and other elements. 
encourage scientific explorations, while. the Society for the 
Science sustains scientific men in declining heal es to the relief 
of their widows and orphans. The two organizations are therefore com- 
plementary to each other, and are worthy to —_ on side 
CQUTS 
Photography by ‘on For the — — by the Duke 
of 3—We have for some ee 
question—the object of a prize established by a at amateur, 
the uynes. It is required to di a method by the use of 
rs im oq 
carbon alone, neglecting salts of gold, silver, and other metals, to produce 
es this being the only material which submitted to the test of 
time has transmitted to us without 
bee adjo ourned for three years, 
* This Journal, July, 1856, p. 109. 
