tlie Mouths 6r Hands of thofc patients, towhomitmay beallow'd, maybe 
potently cool'd, and other fuch refrefhments may be ealily procur'd. 
4. How far Sal Armoniack,mingrd with Sand or Earth , and not diffolv d, 
but only moiftn'd with a little Water fprinkl'd on ir,will keep Bottles of Wine 
or other liquors morecoole, than the Earth or that ^and alone will doj have 
not yet had opportunity by fufficient trials fully to fatisfie my felf, and there- 
fore refign that Enquiry to the Curious. 
5. For the eooling of Air,and Liquors,to adjuft Weather-glafres(to be able 
to do which.at all times of the year,was one of the chief aimes, that made me 
bethink my telf of this Experiment-) or to give a fmall quantity of Beer &c; 
a moderate degree of coolnefs,it will not be requi(ice,to employ neer fo much'^ 
as a whole pound of Sal Armoniack at a time* /orjou may eafily obferve by 
a feal'd Weather- glafsjthat a very few ounces, well pouder'd and nimbly dif- 
folv'd in about 4. times the weight of Water,will fer^re well enough for many 
purpofcs. 
6. And that you may the Iefs,fcruple at this,! ftall tell you , that even be- 
fore and after Midfummer, I have found the Cold producible by our Experi- 
ment to be confiderable and ufeful for refrigerating of Drinb, &c. but if the 
Sal Armoniack be of the fitted fort (for I intimated above, ihat ) fufpeded,, 
'tis not equally good) and if the feafon of the year do make no difadvanra- 
gious difFerence,the degree of Cold, that may be produced by no more than^ 
one pound (if not by lefs) of Sal Armoniack, may, within its own Sphere of 
Adivity, be much more vehement, than,! prefume, you yet imagine^and may 
afford us eiCcellent Standards to adjuft feal'd Weather glaffes by and for 
feveral other purpofes, Eor I remember that in the Spring,about the end of 
March^OT beginning o£ April, \ was able with one pound of Sal Armoniack, 
andarequifite proportion of Water , to produce a degree of Cold much 
. great€r,than was neceffary the preceding Winter, to make it frofty Weather 
abroad - nay I was able to produce real Ice in a fpace of time, almoft incredi- 
bly fhort. To.confirm which particulars , becaufe they will probably feem 
ftrange to you , I will here annex the Tranfcript of an entry, that I find in a 
Note book of the Fhosnowsm and fuccefs of one of thofe Experiments, as I 
then tryed it though I fhould be afliam^d to expofe to your perufal a thing 
fo rudely pen'd; if 1 did not hope, you would confider, that 'twas haftily^ 
written onely for my own Remembrance. And that you may not flop at any 
thing in the immediately annext Note, or the two, that follow, it will be re-^ 
quifite to premife this Account of the feal'd Thermofcope- (which was a gocd 
one) wherewith thefe Obfervations were made ; That the length of the Cy- 
lindrical pipe was id. Inches ^ the Ball, about the bignefs ot a fomewhat 
large Walnut, and the Cavity of the Pipe by guefs about an eight or ninth 
part of an inch Diameter. 
TheEirft Experiment is thus regiftred. March the 27th, in the Seal'd : 
Weather glafs, when firft put into the Water, the tin(R:ed Spirit reftcd at 
inches : being fuffered to ftay there a good while, and now and i hen ftirr'd 
to andfro in the Water ; it defcended at length a- little beneath 7I inches: 
then the Sal ArmeniackhQ\v\g put in, within about a quarter of an hour or 
a little more, it defcended to inches j .but before that time, inhaifaquar- 
im 
