[8J73 
lamp oicommon /<;^,at leaft a loo times their thicknefle & 
bulk, this ia a few moments at the fame diftaiice before 
the fire, grew wetter and wetter and diflblved into water, 
wheras the Salt: Icicles after ^ quarters of an hour, lying 
before the fire did at length dry into a white powder 
perfect Salt, themoillure totally Evaporating. 
Aifo the 6*^^ Water Icicles tzQicdv^Ty Salt, when firft 
taken out of the Water. 
I repeated the fame experiment of expofing to freeze the 
bottles of Natural Brine of Knashorough Sulphur Well halfe 
Evaporated,and Scarborough Sea Water, the fame as for- 
merly , the 7 and 8 th inftant at Night, & with the like 
fucceife ; viz, no Icicles in the natural brine, but the 
fame large ones as above defcribed I had in the Sea 
Water, but not till after the 2d Nights keen freezing. 
Thefe Salt Icicles continued unthawed in the bottles, 
though they were brought into the Houfe and kept in 
a warm room long after all other Ice within doors was 
gone, viz, till die 12th inftant at Night, when the Ici- 
cles alfo were diffolved and vaniflit. 
From which Experiments we note, i . that there may 
be Salt Ice from Sea Water frozen, which the Expe- 
riments of this ^y. of the lafl year did not feem to favour. 
2. that there is a real difference betwixt natural Brine^ 
and Sea Water ; as there is betwixt the Salts themfelves, 
which they yield. 
3. That the great floating Mountains of Ice in the 
Northern Seas (if upon flrid: Tryal they lliall be found to 
be fait, which fhould be further enquired into,) are not 
only the effects of many yeares free'^ng, but alfo much 
of their magnitude may be owing to the natural dura- 
tion of that Tort of Ice. 
Before I end, give me leave togueffe at the original of 
the iVi>re of Mgypt the Experiments made about it 
at Oxford plaialy fhew to be little different from S^l 
Armoniac. 
Az That 
