3<&6 Dr. Priestley’s Experiments and Qbfervations 
vapour of fpirit of wine in contaT with them, different fub- 
fiances were formed according to the -metals employed. The 
new fubftances hereby formed may be faid to be the feveral 
metals fuper- fatu rated with phlogifton, and may perhaps not 
be improperly - called the charcoal of metals. . 
That this appellation is not very improper, may appear from 
thefe fubftances yielding inflammable air very eopioufly when 
they are made red-hot, mnd the fteam of "water is tranfmitted 
in contact with them, juft as when the- Charcoal of wood is 
treated in the fame manner. The detail of thefe experiments 
I referve for another communication, as alfo thofe of the con- 
-verfion of fpirit of wine , tether, and oil , into different kinds of 
inflammable air, by tranfmitting them, in vapour, through 
hot earthen tubes. In the mean time, I fhall think myfel'f 
happy if the communication of the preceding experiments fhall 
give any fatisfadtion 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 few general 
inferences from the principal of the experiments above-men- 
tioned, efpecially relating to the proportional quantity of phlo- 
gifton contained in iron and water. 
When any quantity of iron is melted in dephlogifticated air, 
it imbibes the greateft 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 
gave 
2 
