on the Method of making Ice at Benares. 131 
Tatties are a kind of mat, made of fresh green bushes, or 
long roots, like snake-root ; they are affixed to the door or 
window frames, and kept constantly sprinkled with water. 
The degree of cold produced by their means is supposed to 
be in proportion to the heat of the wind which passes through 
them, as on that depends the quantity of evaporation. 
Benares, 
October i, 1792. 
I am, &c. 
J. LL. WILLIAMS. 
