60

The quantities in the troy pound, suppos-ing the water, &c. to amount to 100 grains,are,

Coarse sand

1415

Finer —

1188

-2603

Argill -

934

Calx -

2122

5659

2d, This contained

two-eighths of potters

clay, three-eighths parings of limestone, andthree-eighths coarse sand. The centesimal pro-

portions are,

Coarse sand

37,5

Finer —

14

-51,5

Argill - - - 11

Calx - - - 37,5

100