Painting. 
Mr. KSrr’s Htfiory of the 
ing grindstones are made only of fuch land as will 
pafs eaSily through fine muffin, in the proportion 
of two parts fand to one of Lac. This fand is 
found at Ragimaul. It is compofed of Small an- 
gular crystalline particles, tinged red with iron, 
two parts to one of black magnetic fand. 
The Stone-cutters, in Head of fand, ufe the 
powder of a very hard granite called Corune. 
Thefe grindstones cut very faff. When they 
want to increafe their power they throw fand 
upon them, or let them occasionally touch the 
edge of a vitrified brick. The fame composition 
is formed upon flicks, for cutting Slones, Shells, 
&c. by the hand. 
Take one gallon of the red liquid from the firfl 
wafhing for Shell Lac, Strain it through a cloth, 
and let it boil for a Short time, then add half an 
ounce of foap earth (foffil alkali) ; boil an hour 
more, and add three ounces of powdered load 
(bark of a tree) ; boil a Short time, let it Stand 
all night, and Strain next day. Evaporate three 
quarts of milk, without cream, to two quarts, 
upon a Slow fire, curdle it with four milk, and 
let it Stand for a day or two ; then mix it with 
the red liquid above mentioned ; Strain them 
through a cloth, add to the mixture one ounce 
and an half of allum, and the juice of eight or 
ten lemons : mix the whole, and throw it into a 
cloth-bag Strainer. The blood of the infedt forms 
' a coagulum with the cafeous part of the milk, 
and jemains in the bag, while a limpid acid 
water 
