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mometer may perhaps, in future, give more fatis- 
faftory information upon the fubjedt. Perhaps I have 
been too minute in detailing consequences from an 
hypothecs, of what probably never doth obtain ; 
namely, that the atmofphere may be confldered as 
equally heated in all its different parts ; and that 
the variation of the abfolute elafticity of its com- 
ponent particles is proportional to the change in the 
degree of uniform temperature, as if the abfolute 
elafticity were influenced by no other caufe. But fuch 
is the neceffary order of enquiry. Theory mull begin 
with the moft Ample cafes, confldering what would be 
the effedf of fome known caufe, adling Angly, and in 
the moft Ample manner; and comparing the conclu- 
Aons from what it is fuppofed , with the effects which 
are , the difference leads us to the difcovery of other 
caufes, and to an eflimation of the feparate effects of 
each, and of the compound effects of all the known 
caufes any how combined. 1 fhall only add, that as the 
ftate of an atmofphere, unequally heated in its differ- 
ent parts, may be reprefented by parts of different 
logarithmics, it is poffible, that inftead of one point 
of unaltered denAty, and one point of unaltered 
preflure, we might And feveral, if fynchronous ob- 
fervations could be made at feveral fucceflive eleva- 
vations fufficiently different. 
10. If the atmofphere of the earth reaches to in- 
Anite heights with a Anite denAty ; for the fame 
reafons, that of Jupiter and every other planet, will 
reach alfo to infinite heights, above the furface of 
the planet with a Anite denAty. The atmofphere 
therefore of every planet will reach to the furface of 
every other planet, and to the furface of the Sun'; 
