234 Continuation of the Experiments and Ohfervations 
The candle of fulphur being weighed, was found to have loft 
2°,75gT. ; therefore, 20,75 gr. of fulphur contain 7,287 gr. 
of phlogifton, befides the quantity of phlogifton which re- 
mained in the vitriolic air. This air muft have amounted to 
2 °’75 ~ 7*287 = > 3, 4 6 3 gr. which contain 1,141 gr. of phlo- 
gifton; therefore, the whole quantity of phlogifton in 20,7 5 
gr. of fulphur is 8,4 S gr. ; therefore, 100 gr. of Jutphur con- 
tain 40,61 gr. of phlogijton and 59,59 of vitriolic acid. 
Several attempts have hitherto been made to determine the 
proportion of the conftituent parts of fulphur ; but all were 
evidently defective. The firft was that of stahl, who calcu- 
lated the quantity of phlogifton from that of the acid remain- 
ing after flow combuftion ; but as much, both of acid and 
phlogifton, was diftipated, and as the remaining acid was alfo 
phlogifticated, and attracted much of the moifture of the air, 
no conclufion whatever could be drawn from this experiment. 
The fecond method was, to form a liver of fulphur, and con- 
vert this by a gentle long continued heat into a tartar vitriolate, 
and then calculate the weight a given quantity of alkali would 
gain by this operation. This was alfo deviled by stahl, and 
followed by brandt and newman, and by it they determined 
the proportion of phlogifton to that of acid to be nearly as 1- 
to 16. But during the formation of the liver of fulphur, 
whether in the moift or dry way, much of the phlogifton and 
acid is diftipated, as is evident by the vapour and fmell that 
proceed from it, their alkali alio contained fixed air, which it 
loft during the operation, and of which they kept no account, 
as they were ignorant of its exiftence ; and the tartar vitriol 
formed by them or lal polycrefte retained much undecompoled 
fulphur, as always happens when it is not ftrongly heated; fa 
that this method alfo was very imperfeff:, however fome fub- 
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