354 Of Things relating to Cbytnijlry,&c Part IV. 
Apr. 3. 1 6j<?. The firft of this kind was made by Mon- 
fieur Baldwin, a German Lawyer who gave it the Name 
above, but with no direction for the making of it. Nor 
doth he fo much as mention the Materials. 
I call it Solid, to diftinguifh it from two Liquid kinds. 
The Author of one, ■ fuppofed to be Mr. "Dan. Kraft. The 
other invented by the Honourable Mr , Boyle 5 which He 
calls the Aerial Nottiluca 3 and whereof He hath lately 
publilhed an excellent Difcourfe. In whofe Laboratory, the 
folid kind was alfo made by his direction, feveral ways. 
Of the Procefs for This here, Dr. Slare fome years fince 
received a hint from Dr. Cbriftian Conner ding, Archiater to 
the Duke of Zell. And not hearing of any one, amongft 
many that have try'd, befides thefe Three, to have fuc- 
ceeded in the making of it, he hath imparted the following 
Account. 
Take good firm Chalks ignite it in a. Crucible, and then 
powder it. Put into a pint or half a pint of ftrong Spirit of 
Nitre, Cochleatim, as much hereof, as will ferve well to fati- 
ate it, /. e. till it becomes fweetifh, and makes no Effervefcence 
upon the injection of the Chalk, Then dilute this Liquor 
with fair Water, filtre it through a Paper, and fo evaporate 
it in a large Glafs, or glazed Veffel, or good Hajfian Crucible 
to a dry Salt. The preparation whereof may be perforrnd 
in four hours : whereas I have feen a Pocefs, that would take 
as many Weeks to follow it. 
The main bufinefs lies in the good Enchirefis 3 about 
which thefe feveral Directions muft be carefully ob- 
fervd. 
Firft you muft prepare a Veffel of Clay, fomewhat like 
a {hallow Coffee-Dijh, of three, four, or five inches in Dia- 
metre, and an inch in depth, very well baked and neal'd. 
Then place it under a Muffle, after the manner of a Refining 
Furnace, in the place where the Cuppels ufually ftand : and 
fo make it red hot. Then put the prepared Salt into it, by 
little and little, not above sjff-or sij at a time. Keep the 
fire to that degree, which will fuffice to make the Salt boil 
in the Diih, fo as to fpread it felf every way, and creep up 
. the fides of it. Before the Salt, laft put in, be confumed, be 
fure always to be ready, to make a new addition, otherwife 
your labour fo far is loft , and you muft begin agaia 
When 
