( 4 «) 
be made to faring by Snow and Salt, before it begin by Conge- 
lation to expand it fel£$ and then, how-to meafLire by the diffe- 
ring Weight and Denfity of the fame’ portion of Water, what 
change was produced in ir 3 betwixt the hotteft time of Summer, 
and firft glaciating degree of Cold, and then the higheft, which 
our Author could produce by Art - : Where an Inquiry is an- 
nex'd, whether the making of thefe kind of Tryals with the 
waters of the particular Rivers and Seas, men are to fail on,may 
afford any ufeful eftimate, whether or not, and how much, (hips 
may on thofe waters be fafely loaden more in Winter, than in 
Summer. To which is added the way of making exadt Difco- 
veries of the differing degrees of Coldnefs in differing Regi- 
ons, by fuch Thermometers, as are not fubjedt to the altera- 
tions of the A tmojpberes gravitation, nor to be frozen. 
5 . Whether in Cold, the diffufion from Cold Bodies be made 
more ftrongly downwards, contrary to that of Hot Bodies; 
Where is delivered a way of freezing Liquors without danger 
of breaking the Veffel, by making them begin to freeze at the 
bottom, not the top, 
6. Whether that Tradition be true, that if frozen Apples or 
Eggs be. thaw’d neer the Fire, they will be thereby fpoil’d 3 but 
if immerfed in cold water, the Internal Cold will be drawn out, 
as is fuppofed, by the External Cold ; and the frozen Bodies 
will be harmiefly thawed ? ltem 3 Whether Iron, or other Me- 
tals, Glafs, Stone, Cheefe 3 (3 c. expos’d to the freezing Air , or 
kept in Snow or Salt, upon the immerfing them in Water will 
produce any Ice ? /um,What ufe may be made of what happens 
in the different waies of thawing Eggs and Apples, by applying 
the Obfervation to other Bodies, and even to Men, danger- 
oufly nipp’d by exceffive Cold. Where -is added not only a 
memorable Relation, how the whole Body of a Man was fuc- 
cesfully thawed and cafed all over with Ice, by being handled, 
as frozen Eggs and Apples are ; butalfo the Luciferoufnefs of 
fuch Experiments as thefe : and likewife, what theeffe&sof 
Cold may be , as to the Confervation or D.eftrud:ion of the 
Textures of Bodies : and in particular, how Meat and Drink 
may 
