a On Volcanos and Earthquakes. 
between the two fluids, and upon their relative speeifie 
ravi 
ath, ‘That any particular effect of pressure upon air may 
take place, deep in the ocean, must of course depend upon 
the fact Hat air is conveyed to the region supposed. 
_ 5th. No cause is obvious, that can produce such an effect; 
the. Sainte contact of air and water, however often re- 
peated, can do no more than saturate water with air, at the 
particular temperature and pressure 
6 n this condition, and upon the surface of the globe, 
the water and the air form, apparently, a homogeneous flu- 
id, and should this fluid descend to the Taos depth, and 
be subjected to ever so many mile s of p tis 
ceived that, the air : 
- 
rgo any other chan hin e diminution of v ,as 
proved by Mr. Perkiae’ experiment on the ity of 
water, 
7th. Could air be forced down through and beneath a su- 
erincumbent ocean, of the depth supposed, then it would 
bei ina suitable condition to receive the effect of the pres- 
sure; but air, eeeay united to water at or near the surface, 
has already bec a fluid by the union, (or a constituent 
of a fluid,) and oa probably undergo no other change than 
a mere fluid undergoe 
8th. Is it physically —~ that any aerial body should 
be subjected to such a pressure, as to acquire as grav- 
ity greater than that of water, and still retain its aerial form? 
Would not the supposed Spronmatio’ of its particles neces- 
sarily cause it to becomea ; and is it not physically ae 
ele that by increased ae it may become even a solid ? 
<— — Answer to.the Objections. 
Novi and 2. Experiments made in Paris, prove that air 
may bi above the density of water, without losin ng 
its elastic (OF gaseous xroperties; the point at t_ which it 
vier a liqui one beyond that density. - 
No. hy 8h itnot form a stratum under water, its 
density Belg y iteh oe mb two fluids having combined as 
far as their affini goes 
~ No. 4 and 5. True, toe the air should be conveyed to the 
st regions of the ocean, is a consequence of its whole 
mass being saturated with i 
Ni 0.6 and 7. That the air should separate from water sat- 
