306 Dr4 PiiiEstLEY'a Experiments and Obfervattons 



vapour of fpint of wine in contact with them, different fiib- 

 ''ilances were formed according to the metals employed. The 

 new fubdances hereby formed may be faid to be the feveral 

 metals fu per- fatu rated with phlogifton, and may. perhaps not 

 be improperly called the charcoal of metals. 



That this appellation is not very im.proper, may appear from 

 thefe fubflances yielding inflammable air very copioufly when 

 they are made red-hot, and the fteam of tvater is tranfmitted 

 in contacl with them, juft as when the charcoal of wood is 

 treated in the fame manner. The detail of thefe experiments 

 1 referve for another communication, as alfo thofe of the con- 

 verfion of fplrit of wine, ather, and oil, into different kinds of 

 inflammable air, by tranfmitting them, in vapour, through 

 hot earthen tubes. In the mean time, I fhall think myfelf 

 happy if the communication of the preceding experiments (hall 

 give any fatisfadlon to the Members of the Society. 



P O S T S C R I P T, 



BEFORE I clofe this paper, 1 wifh to make a iow general 

 inferences from the principal of the experiments above-men- 

 tioned, efpecially relating to the proportional quantity of phlo« 

 gifton contained' in /row and water. 



When any quantity of iron is melted in dephlogiftlcated air, 

 it imbibes the greatefl part of it, and gains an addition of 

 weight very nearly equal to that of the air imbibed. Thus the 

 abforption of twelve ounce meafures of dephlogifticated air 



2 gave 



