c W ] 
The Oyls of Olive and fvveet Almonds congeal- 
ing with the cold, could not be examin'd by the 
Areometer in the winter fcafon. 
According to this table, the increafe of the fpecific 
weight of common water in the winter above its 
weight in the fummer,is not more than about the one 
hundred and twenty-fourth part of the whole 5 which is 
little more than half of what Profeflor Mufschenbroek 
has elfewhcre accounted the fame, defart e qu un pied 
cubique Rhenan d’Eau , qui pefe environ 64 livres en 
Ete , fe tr ouver a etre en Hiver de prefque 6f livres. 
Ejfai de Rhyftque p. 424. but fure this difference 
is much too great. 
Notwithflanding that all fluids are condenfed by 
cold, it is only till fuch time as they are ready to 
freeze j for upon the freezing they immediately ex- 
pand again, fo as for the ice to be lighter fpecifically 
than the fluid of which it is formed, and to fwim 
in it: Mufschenbroek gives the fpecific weight of 
Ice to be to that of Water commonly as 8 to 9. 
La pefanteur de la Glace eft or dinair ement a celle 
de I’EaUp comme 8^9. pag, 441. 1 am not ac- 
quainted .with any other accurate experiments upon 
this fubjed, and it is hard to get ice in which 
there are not large bubbles of air included. 
The Ehilofophical Society at Oxford , together 
with their Table of Specific Gravity already fo often 
mentioned in the foregoing pages, communicated 
befides at the fame time, to the Royal Society , 
another Table of a groffer nature indeed, but 
which being printed in the fame Number 169. of 
the Rhilof optical Tranjadlions , and appearing to 
be of ufe for many purpofes : I have thought 
Rrr 2 the 
