Chemical analysis showed them to consist in 100 parts of

A B C

Starch with traces of other 37.58 34.56 36.76

organic matter

Arsenious acid (white arsenic) 50.34 51.40 48.94

Oxide of lead {6} 1.07 1.16 0.83

Other mineral matters chiefly 11.01 12.88 13.47

carbonate of magnesia

100.00 100.00 100.00