Productions of Boutan and Thibet,,, ' tm 
earthen pot, with a fmaller one inverted put over the materials?, 
and well luted to the bottom of the larger pot. Over the 
fmall one, and within the large one, the fuel is placed, and 
the fire continued for about forty minutes* A certain quantity 
of fuel, carefully weighed out, is what regulates them with 
refpedt to the degree of heat, as they, cannot fee the materials^ 
during the operation.. When the veflel is cool, the fmall in- 
verted pot is taken off, and the materials collected for ufe. I 
attended the whole of the procsfs, and examined the materials 
afterwards. The quickfilver had been afted on by the other 
ingredients, deprived of its metallic form, and rendered, a fafe. 
and efficacious remedy.. 
A knowledge of chemiftry has taught us a more certain? 
method of rendering this valuable medicine active and effica- 
cious ; yet we find this, preparation anfwering : every good pur- 
pole, and by their guarded manner of exhibiting it perfeftly; 
fafe. This powder is the balls of their pill, and often ufedin -ex^* 
ternal application* The whole, when intimately mixed, formed! 
a reddifh powder, and was made into the form of pills by. the : 
addition of a plum or date. Two or three pills taken, twice a> 
day, generally bring on, about the fourth or fifth day, a fpit~ 
« 
ting, which is encouraged by continuing the ufe of . the pills , 
for a day or two longer. As the falivation advances, they put f 
aftick acrofs the patient’s mouth, in the form of a gag, and! 
make it faft behind. This, they fay, is done to promote die 
fpitting, and prevent the lofs of their teeth. They keep, up. 
the falivation for ten or twelve days, during . which time the 
patient is noun filed with congee and other liquids* Part of 
this powder is often ufed .externally- by diffufiag it in wanm 
water, and Wafiiin g fores and buboes* T hey difperfe bu boes 
frequently by poultices of turnip tops, in which they always 
Kv,:. ■ i tpnc- 
