' liigher, but rather by expanding it felf in the upper part 
. of the glafs,)preffed the §^u^ther downward. And I fuf- 
ped:, that others (without heeding itj may have been in 
like manner impofed upon, as I was ^ efpecially while 
thdrBarofcope hath been but newly prepared, and not well 
cleanfedof^m 
' And the fame account, perhaps, may ferve for its ftarid- 
ing fo high in frofty weather. Water, we know, though 
it contract with cold, yet when it comes to Frieze doth 
expand it felf. /Which makes Ice lighter then water, and 
to fwim on the top of it.) Now whether this be purely of 
it felf, or f in part at leaft,j from the particles of ^tr 
lodged in itj may not perhapsbe fo eafy to determine. 
However,if there be the like effedls onAr, as on water, 
fnamelyjthat it expands withFriezingi)or if,in the Sfuick^ 
Silver there be kdged particles of water as well as oiAir-y 
we have, either way, an account of this Phaenomenon. 
For, then, the fmall particles, whether of Air^ or water, 
lodged in the ^icJ^Sther, being thus expanded by 
friezing, will make the ^uJ^Stlver fwell, and fofland 
^higher, without increafing its weight ; and confequently, 
without arguing a greater weight of cxternal^-^/rpreffing 
Wnthc&Sign^nt^zckzSilver. 
Jln Ab>- 
