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Papers of thefe TranfaBiens ; but the Prefs^ employed upon this 
Treatife, having been retarded fomewhat longer than was ghcf- 
fed, the faid promife could not be performed before this time : 
wherein it now concerns the inquiring World to take noticej 
that this fubjed:,as it hath hitherto bin almoft totaily negledledj 
fo it is now, by this Exceellent Author, in fuch a manner hand- 
led, and improved by near Two /mndnd choice Experimsnts and 
Ob/ervatmis^thgLt certainly the Curious and Intelligent: Reader will 
in the perufal thereof find caufe to admire both theFertility of a 
Subjedl, feemingly (o barren, and the Author's Abilities of iin- 
proving the fame to fo high a Degree. 
But to take a fliort view of fome of the particulars of this Hi- 
Jlory, and thereby to giv e occafion to Philofophkal men, to take 
this Subjeit more into their confideration, than hitherto hath 
been done ; the Ingenious Readers will here feCj 
1, That not only all forts of JcidznA Alcali^ate Salts,and Spi- 
rits, even Spirit of Wine ; but alfo Sugar,and Sugar of Lead mi- 
xed with Snow, are capable of freezing other BodieSjand upon 
what account they are fo. 
2, That among the Subftances capable of being frozen^ there 
are nor only all grols forts of Saline BodieSj but fuch alfo as are 
freed from their groffer parts, not excepting Spirit of Urine^the 
Lixivium of Pot-a(hes, nor Oyl of Tzitzvyper deliqutum, it felf. 
3, That many very fpiri tuous liquors, freed from their aqueous 
parts,cannot be brought to freeze,neither naturalIy,nor artifici- 
ally: And here is occafionally mentioned a way of keeping 
floats unpaifable in very cold Countries, recorded by Olaus 
Magnus, 
4, What are the wayes proper to eflimate the greater or lefTer 
Coldnefs of Bodies ; and by what means we can meafure the 
intenfiefs of Cold produced by Art, beyond that, which "Hsla- 
ture needs to employ for the freezing of Water ; as alfo, in 
what proportion water of a moderate degree of Coldnefs will 
