268 On the Chemical Action of 
loft, as in ‘alle ftoves; for thefe grates have fide as well as 
bottom bars, which allow the paididiit heat and light to be 
thrown out into the room without any impediment: and in ~ 
fact large rooms, halls, and the like, which by the ufual me- 
thods can hardly be warmed, or made at al] comfortable in 
cold weather, may, by means of thefe improvements, be 
heated as effectually as the fmalleft apartment; for, when 
their full effect is wanted to be produced, it is only neceffary 
to keep the fence in its recefs, that even that portion of heat, 
which would be kept back by the interpofed glafs or wire- 
work, may be thrown out into the room, and perform its 
office. They are alfo an effectual cure for fmoky chimneys, 
which not only caufe great wafte and deftruétion of good 
furniture, but many difeafes to the inhabitants of houfes 
plagued with that evil. They caufe a clean fire-fide to be 
eafily commanded at all times, as hardly any of the daft or 
afhes fall through the fide bars, almoft the whole pafling 
through the bottom bars down into the drawer; and any 
fire lighted in fuch improved grates burns up and becomes 
lively in a few minutes, without the aid of bellows, and that 
watchful care which common grates or fioves require. 
X. On the Chemical A&ion of different Metals on each other 
at the common Temperature of the Atmofphere. By C. PaB- 
BRONI*. 
"Tat particular fenfation, firft made known by Sultzer, 
which is felt on the tongue on bringing two metals into mu- 
tual contact, and which would have excited none if they 
had been applicd feparately to that organ, has been ranked 
among the galvanic phenomena. C., Fabbroni, however, in+ 
ftead of siaene thefe effeéts to an agent almoft unknown, 
fuch as the aces fire, is of opinion that it depends on.a 
chemical operation, perhaps as the fenfation of tafte itfelf, 
He has endeavoured to prove the truth of this opimion by a 
number of obfervations and experiments, - 
© From Bxlictin des Sciences, Vol. 11, No. 5. 
He 
