Anthracite Coal of Rhode-Island. 8) 
A similar trial, upon the the same quantity of coal, immediately 
from the mines, gave also six wine pints of the same kind of 
gas. 
A third experiment, u her similar portion, also just 
from the mines, afforded Aerie wine pints of gas. 
The difference between these two latter specimens, 
to have been, that the former was ge the layers of the ball 
that were more dry, and the latter from those that were more 
thoroughly wet.* 
These experiments prove, that the gas obtained from the 
Rhode-Island anthracite, proceeds, principally, if not entire- 
ly, from the decomposition of water, by the action of the ig- 
nited carbon. At least, it is demonstrated, that this is the 
reason wliy no gas was obtained from the . I. anthra- 
cite, in the experiment related in the former memoir. i) 
at communication, I expressed the opinion, that gas es has 
; has 
been fully verified by the resu 
The anthracite of Rhode-Island then affords infantile 
gas, as well as that of Pennsylvania. Referring to the table 
given in the former memoir, we find, that the gas from the 
Pennsylvania anthracites was considerably more 
than that now obtained from the coal of R. Island. oe 
I am, however, at this time to state, that the inflammable 
gas procured in these chemical processes appears, as re 
the comparison between the anthracites of Pennsylvania and 
R. Island, not to give an exactly correct criterion of the quan- 
tity of flame, which they relatively exhibit, while burning i in 
domestic use. A correspondent, who had acquired 
ble ex ce in the use of the anthracites of Pennsylvania 
and R. Island, remarks in a letter now before that 
there are no no points of difference between them so remarkable 
as the greater quantity of , and the less amount of resi- 
dea’? in the R. Island coal.” 
I was at this account with respect to the sore 
but I can now state, from my own observation, that the co 
bustion of the R. tstand ern - the hall or entry stove 
inferior in quantity to as. afforded eS the best 33 of 
* [ am not quite certain, that in this latter experiment, the aie qunthey of chs 
was not somewhat increased, by 2 smell Eat ee ts however, bege 
experiment, that might have adhered to tube which had, however, been 
carefully cleaned. 
VOL. I.——NO. 1. Bi 
