( 2 <; 9 ) 
the Mouths or Hands of thofe patients , to whom it may be allow'd , may be 
potently cool’d, and other (itch refrefhments may be eafily procur’d.. 
4. How far Sal Armoniack .mingl’d with Sand or Earth , and not difTolv’d, 
but only moiftn’d with a little Water fprinkl’d on it, will keep Bottles of Wine 
or other liquors morecooie, than the Earth or that Tand alone will do, I have 
not yet had opportunity by fufficient trials fully to fatisfie my felf, and there- 
fore relign that Enquiry to the Curious. 
For the cooling of Air,and Liquors, to adjuft Weather- glaffes(to be able 
to do which, at all times of the year, was one of the chief aimes, that made me 
bethink my felf of this Experiment;) or to give a fmall quantity of Beer &c. 
a moderate degree of coolnefs,ic will not be requisite, to employ neer fo much 
as a whole pound of Sal Armoniack at a time* jFor,you may eafily. obferve by 
a feai’d Weather- giafs, that a very few ounces, well pouder’d and nimbly dif- 
folv’d in about 4. times the weight of Water, will ferve well enough for many 
purpofes. 
6 . And that you may the lefs,fcruple at this,T fball tell you , that even be* 
fore and after Midfummer, 1 have found the Cold producible by our Experi- 
ment to be confiderable and ufeful for refrigerating of Drinks, &c. but if [he 
Sal Armoniack be of the fitteft fort (for I intimated above, 1 fiat I fufpe&ed, 
*tis not equally good) and if the feafon of the year do make no difadvanta- 
gious difference, the degree of Cold, that may be produced by no more ihm 
one pound (if not by lefs) of Sal Armoniack, may, within its own Sphere of 
A&ivity, be much more vehemeat, than, I prefunie, you yet imagine^and may 
afford us excellent Standards to ad juft feal’d Weather glaffes by ■ and for 
feveral other purpofes* For I remember that in the Spring, about the end of 
March, or beginning of April, I was able with one.pound of Sal Armoniack, 
and a requifite proportion of Water , to produce a degree of Cold much 
greater, than was neceffary the preceding Winter, to make itfrofty Weather 
abroad ^ nay I was able to produce real Ice in a (pace of time, almoft incredi- 
bly fhort. To confirm which particulars , becanfe they will probably feem 
ftrange to you, T will here annex the Tranfcript of an entry, that I find in a 
Note book of the Phenomena and fuccefs of one of thofe Experiments, as I 
then tryed it •, though I fhould be aftiamM to espofe to your perufal a thing 
fo rudely pen’d- if I did not hope, you would confidcr, that Twas haftiiy ■ 
written onely for my own Remembrance. And that you may not flop at any. 
thing in the immediately annexe Note, or the two, that follow, it will be re- 
quifite to preraife this Account of the feal’d Thermofcope- (which was a good 1 
one) wherewith thefe Obfervations were made ■ That the length of the Cy- 
lindrical pipe was 1 < 5 * Inches • the Ball, about the bignefs of a fame what 
large Walnut, and the Cavity of the Pipe by guefs about an eight or ninth 
part of an inch Diameter, ' 
The Firft Experiment is thus regiftred.. March the 2-th, in the, Seal’d 3 
Weather giafs, when firft put into the Water, the tinfted Spirit reded at bf 
inches : being furred to flay there a good while, and now and , him ftir'f d 
to and fro in the Water ; it defeended at* length a little beneath 7 Ifinche?:.. 
then the Sal Armwacl^bewg pur in, within about a quarter of an hour or 
aftttle more, it defeended to 2^. inches ? but befox-exhac time, in half aqua* - 
