C 5^57 ) 
»Tis tVMQ^ faith mr Autlor^ that at thefirft view this operat'- 
©ofeemsto be grofsj requiring much time and labour^ but 
little Art 5 but well confidcred 'tis highly admirable^ being af- 
fifted by the wonderful Sale of the Air, as the only Carholic 
diflblvenr» And that that Salt is by the continual Grfnding at- 
tradted and intermixt, many other Experiments^ made by him 
about it, have caught him, which he referves for the publica- 
tion, hereafter to be made of the things done in the Gottorpi= 
an Laboratory. 
The /^ro;?^ Experiment of the ufe of this G*'/W/«^, was in a 
tiue and genuine preparation of the ^^frr^^ry of Antmony : A 
procefs riffirm'd not only made by himfelf before his Prince, 
but alfo by the hands ©fthat i^ery experienced Chymift of the 
tledor of Saxr ny, Johannes K^vchelim ; to have more than one 
firing to his bow. 
The Operation confifts in this^Grind firft the T{egulm of Jn^ 
tmonyintosin impalpable powder 5 and to one pound of ic^ 
add two pounds of very pure and dry fait ofTartar^ and eight 
ounces of Sal Armoniac § and mix it well together Then mo:— 
ft^n it with fome Urine of an healthy man, efpecially of one 
that drinks wine, if fuehmay be had 5 and cake care, to havts 
this mixture ground for a whole day together without any ia^* 
termiffionby two very ftrong young men ; ah^ays, if there 
want moifture, fprinkling Urine upon iu Then put this 
mixture into a Bolt head and powre fo much Urine upon it; 
that it may ftand three inches high over it, and clofing it welf^ 
keep it in digeftionfbr a whole monetbj daily fhakiogit^ And ! 
if during that time the mafs appear to be dryj powre on more 
Urine» The Digeftion being ended, form the matter into g!o- 
buls with equal parts of beaten glafs and calx vive^and dry it ia ; 
the (hadei^ Of thefe, extraft the Mercury in manner following^ 
Let there be ready an oblong iron vefFel, like a Bolt- head, 
into which powre cold waterj and dig it into the grou^id; Up-, 
onitputan Iron plate with many holes in it, and lay thereon , 
the faid globuls well dry'd 5 1 heo fit alfo an Iron head, fome-r 
what flatted, to it, that you may conveniently lay coals s 
thereon, and thus keep a moderate fire for four hours:, then in- 
creafa the fire for as many hoursj unto the latt* After that, let 
it coolj and beware, not to ftir the veflel digg'd in the ground^ , 
nor to pour out the waterj before thatbe altogether cooled 3 
