628 Dr. guthrie on the Antifeptic Regimen 
froths with a machine refemblmg the ftaff of a chocolate 
pot, but larger. To this liquor, thus prepared, is added 
a couple of flop-bafons full of the grounds of old quafs, 
leaven, or, if thefe are not to be procured, which can fcarce 
happen in Ruffia, they ufe as a ferment a piece of their 
four bread, and cover the tub with a c>otu to keep out 
the duft, until the liquor has acquired a fourifh tafte, 
which marks its being ready for ufe. However, this de- 
pends upon the temperature of the weather, as it ac- 
quires the necefTary acidity fooner or later, according to 
the feafon or degrees of artificial heat that is employed. 
This liquor the pooreft of the people drink as they draw 
it from the tub or calk where it is kept for ufe; but 
there is a fuperior kind of quafs, which the better fort 
of people make and bottle for their common ufe ; indeed 
people of the higher! rank love and ufe it conftantly. 
The better fort of Quafs, or Keefla Stchee. 
They take one pood (thirty-fix pounds Englifh) of 
rye, flour, or meal, and half that quantity of ground 
malt, and put them into a tub made for the purpofe with 
a clofe cover, pouring a kettle-full of fcalding water, 
ftirring with a flick as they pour, and then cover it clofe 
up for an hour; at the expiration of which time they add 
boiling 
