360 M. C. Lea on a Colored Derivative of Naphthaline. 
In the process of ring-making, and the breaking-up of the 
rings to form planets, the general principle of the conservation 
of areas would hold good, but the vis viva of the system would, 
as we have attempted to show, gradually increase, owing to the 
greater influence of the force of gravity in consequence of the 
loss of caloric, which acts as a repulsive force, from the system.” 
[To be continued.]} 
ArT. XXXV.—WNote on a Colored Derivative of Naphthaline; by 
M. Carey Les, Philadelphia, 
In the course of an examination of the compounds of napth- 
thaline, the following observation was made, and, as at the 
nt day, every colored reaction belonging to the products of 
coal-distillation is a matter of interest, I publish it. 
While preparing some sub-chlorid of naphthaline C,, H, Cl; 
by passing chlorine over naphthaline, I washed the crude pro- 
duct with ether, and separated the etherial liquid by filtration. 
exposure to the atmosphere, the ether passed off; there re- 
mained a small quantity of a pale yellow transparent watery 
acid liquid, which separated itself from the denser and more 
colored portions. Placed by itself in a small capsule, it depos- 
ited after a time a bright blue film. The liquid was poured 0 
from this film into another capsule, when it gradually deposited 
a further porti 
form of solution wholly destroyed the color, nor was it then re- 
stored by chlorhydric acid as when it had been rendered purple 
by ammoniacal vapor 
