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Papers of thefe TranfaUions s butthePrefs, employed upon this 
Treatife, having been retarded fomewhat longer than was ghei- 
fed 5 the laid promife could not be performed before this time : 
wherein it now concerns the inquiring World to take notice, 
that this fubje^as it hath hitherto bin almoft totally negledted, 
fo it is now, by this Exceellent Author, in fuch a manner hand- 
led, and improved by near Two hundred choice Experiments and 
Observations ) that certainly the Curious and Intelligent Reader will 
in the perufal thereof find caufe to admire both theFertility of a 
Subjed, feemingly fo barren, and the Author’s Abilities of im- 
proving the fame to fo high a Degree. 
But to take a fiiort view of fome of the particulars of this Hi - 
ftory, and thereby to give occafion to Fhilofophical men, to take 
this Subjed more into their confideration, than hitherto hath 
been done 5 the Ingenious Readers will here fee, 
1, That not only all forts of Acid and Alcalp^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 Bodies^and upon 
what account they are fo. 
2, That among the Subftances capable of being frozen, there 
are not only all grols forts of Saline Bodies, but fuch alfo as are 
freed from their groffer parts, not excepting Spirit of Urine, the 
Lixivium of Pot- allies, nor Oyl of Tartar, per deliquium , it felf. 
3, That many very fpirituous liquors, freed from their aqueous 
parts, cannot be brought to freeze, neither naturally, nor artifici- 
ally: And here is occafionally mentioned a way of keeping 
Moats unpayable in very cold Countries, recorded by Qians 
Magnus . 
4, What are the wayes proper to eftimate the greater or lefler 
Coldnefs of Bodies ; and by what means we can meafure the 
intenfnefs of Cold produced by Art, beyond that, which Na- 
ture needs to employ for the freezing of Water; as alfo, in 
what proportion water of a moderate degree of Coldnefs will 
