
350 Mr, War's Thoughts on. the confistuent 
it unites with. ‘Therefore one ounce (576. grains) of deph 
gifticated air, will require 120 grains of inflammable air, or 
phlogifton, to convert it into water.’ And fuppofing the heat. 
extricated by the union of dephlogitticated and inflammable air 
to be equal to that extricated by the burning of phofphorus, 
we fhall find, thatthe union of 120 grains of inflammable air 
with 576 eras of! wisphinalunaie ails extricates 9265° of 
heat. - 2 : a 
18. Inthe eupcumere on the deflagration a nitre wens ca 
coal, by Mef{; Lavotster and De La PLacE, an ounce of 
nitre and one third of an ounce .of charcoal. melted twelve 
ounces of ice. Suppoting the ounce of nitre to have produced 
half an ounce of dephlogifticated air, it ought to have confum=, 
ed.o,1507 ounces of charcoal, and fhould have melted 1 45773) 
ounces. of ice ;) and I fuppofe it: fell fhort of, its effectby,. the 
heat not being sacs intenfe to decompofe the: nitre pers, 
fedtly. ( , . fhe thaedt 
19. By the above eenidesineut $ experiment an ounce of char coall 
required for its combuftion 3,3167 ounces of dephlogifticated air,, 
and produced 3,6715 ounces of fixed aij; therefore there wasy 
united to’each ounce of air; when changed into fixed air, 61,5, 
grains of phlogifton, and 3988? of heat were extracted. Ji ap-" 
pears by thefe facts, that the union of phlogifion, in different propar-, 
tions, with dephlogifticated air, does not extricate proportional quar, 
tities of heat. For the addition of 61,5 grains produces 3988? 
and thé union of 120 grains produces 9265°. This difference 
may arife from a miftake!in {uppofing the fpecific gravity, of the, 
inflammable air Dr. Parestrrey employed to have beenonly-£% 
of that of dephlogifticated air ;, for, if it be fuppofed that its 
{pécific gravity was a little more.than 4 of that) of, the , de=,, 
phlogifticated air, then: equal additions of phlogifton.. would , 
” havell 
