I

Mix with the aid of heat equal weights of pitch, rosin, and plaster of Paris.

II

Mix silicate of soda to a paste with ground glass.

III

Mix boiled oil to a paste with china clay.

IV

Mix coal tar to a paste with pipe clay.

V

Mix boiled oil to a paste with quicklime.

VI

Mix with the aid of heat: Sulphur, 100 pounds; tallow, 2 pounds; rosin, 2 pounds. Thicken with ground glass.

VII

Mix with the aid of heat: Rosin, 2 pounds; sulphur, 2 pounds; brickdust, 4 pounds.

VIII

Mix with the aid of heat 2 pounds of india rubber and 4 pounds of oiled oil. Thicken with 12 pounds of pipe clay.

IX

Fuse 100 pounds of india rubber with 7 pounds of tallow. Then make to a paste with dry slaked lime and finally add 20 pounds of red lead.

X

Mix with the aid of heat: Rosin, 24 pounds; red ocher, 8 pounds; boiled oil, 2 pounds; plaster of Paris, 4 pounds.