288
[In margin][manicule] by S
r. Chri
stopher Wren in order to Examine mon
r: De
Cartes Hypothesis whether the pa
ssing by of the body
of the moon did pre
sse vpon the air and consequently
al
so vpon the body of the water. And that the first
tryall thereof was made at m
r. Boyles chamber in Oxford
m
r. Henshaw De
sired that m
r. Hooke would again
shew his experiment w
ch. he had formerly produced
in order to explaine his Hypothesis of the Reason
of the alteration of
the Pre
ssure of the Atmosphere
D
r. Grew De
sired that the hypothesis he had formerly
produced here might be Considerd of for that he concei
ued that alone was sufficient to explaine the whole
Theory. The substance of w
ch. was, that the pre
ssureof the air
proceeds from the salts that are Di
ssolued into
the air, that tho
se salts when they are Di
ssolued take
Le
sse Room, and soe the air becomes Le
sse pent & crowded
together and consequently pre
sses Le
sse. But when the
salts are vndi
ssolued they take more Room and soe
crowd the air more and make it pre
sse more vpon
the stagnant Quicksiluer.
D
r. Croon also explained his hypothesis of this Pheno=
menon which was to this Effect.
Ref: CELL/RS/HF_290 © Centre for Editing Lives and Letters
