X 6?i ) 
;! Tame proportion with the Heat, and conftquently thai 
the Thermometers graduated by equal Parts of the Expan- 
sion of any Fluid, are not fufficient Standards of Heat or 
Cold. 
This will be more evident from the Experiments which 
I made fbme time fince, with Water, Mercury, and Spi- 
rit of Wine, wherein the following Particulars were ve- 
ry remarkable. 
I. I took a large Bolt-Head, holding about of 
Water, with a narrow Neck to make the Augment there- 
of more fenfible ; and having filled it with Water, and 
ibme few Inches up the Neck, I noted exactly to what 
Mark the Water came • then I immerfed it into a Skillet 
•of warm Water, and let it Hand fo long, till I conclu- 
ded the warm Water had communicated its Temper to 
the Water included in the Bolt Head. And I found that 
tho' the Water were warm, much beyond the degree of 
the Summers Heat, and notwithflanding it was Winter ; 
yet that gentle Heat had fcarce any effedt in dilating the 
Water, (o that it fcarce appeared to have afcended in 
the Neck of the Bolt-head. Then I took the Skillet and 
ftt it over the Fire, when it was obfervable that the Wa- 
ter as it grew hot did flowly afirend in the Neck, efpeci- 
: ally at firft but after it began to boil in the Skillet, the 
i Expanfion thereof became more vifible, and it afcended 
j apace till fueh time as it flopped again, the utmoft Ef- 
; fort of Boy ling Water being able to raife it no higher: 
j Then having made a Mark ac the utmoft height whereto 
\ it had arifen, I took it out, and had the (atisfadiion to 
obferve, that though it was not raifed fo high without 
g a very ftrong boiling, yet it fubfided very flowly, as 
i) retaining fome time the fpace it had acquir'd from the 
i Heat, even after the Heat was paf$'d, and the Glafs was 
(E j ft) cool as to be touched without burning the Fingers, 
j :<Howeverthe next morning I found it reduced to the 
i firft Mark, where it flood when at firft put in, ha- 
il \ L ving 
|. ' MM, 11 
