154 Journal of the Asiatic Society of Bengal. (April, 1906, 
The curve (diagram) is plotted from this table, and for com- 
parison there is also drawn the logarithmic curve 
t=A lg x+B. 
A and B having been —— so that the two curves shall be 
coincident at t=1°5 mins, an 2°5 mins. —— tively, 
The agreement is fairly i The cury 
pang B. 
x 
fa +B 
x3 
A 
== +B. 
all give much worse agreement, 
This result is not in accordance with the s a Suppo 
that the colored compound is Ag(NO,), but font be exp 
by the supposition that this salt ra nrg formula eyo. 
decomposes according to the equatio 
Ag,(NO,), + 2H,O = sac + 4HNO, + 0; 
and 
The formula Ag.(NO,), is also possible— 
Ag,(NO,), = 2AgNO, + O,. 
A similar in psa polution was also obtained Ls the , 
addition of bee dbl to the Bireis of equ also from 
solution. The absorption m of this solution is very 8! 
to that of the nitric acid solution, except that a little more ' 
red end of the spectrum is absorbed and less of the green. 
