I

Sulphate of iron. . .   100 parts

Sulphate of zinc. . .     50 parts'

Oak bark, powder.     40 parts

Tar..............       5 parts

Oil..............       5 parts

II

Mix together chloride of lime and burnt umber, add water, and set on plates.

Blue Sanitary Powder

Powdered alum..... 2 pounds

Oil of eucalyptus. . . 12 ounces

Rectified spirits of tar.............. 6 ounces

Rectified spirit of turpentine....... 2 ounces

Ultramarine blue (common)....... 3/4 ounces

Common salt....... 14 pounds

Mix alum with about 3 pounds of salt in a large mortar, gradually add oil of eucalyptus and spirits, then put in the ultramarine blue, and lastly remaining salt, mixing all well, and passing through a sieve.

Carbolic Powder. (Strong)

Slaked lime in fine powder, 1 cwt.; carbolic acid, 75 per cent, 2 gallons.

Color with aniline dye and then pass through a moderately fine sieve and put into tins or casks and keep air-tight.

Pink Carbolized Sanitary Powder

Powdered alum..... 6 ounces

Powdered green copperas........... 5 pounds

Powdered red lead. . 5 pounds Calvert's No. 5 carbolic acid........ 12.5 pounds

Spirit of turpentine. l.5 pounds

Calais sand........ 10 pounds

Slaked lime........ 60 pounds

Mix carbolic acid with turpentine and sand, then add the other ingredients, lastly the slaked lime and, after mixing, pass through a sieve. It is advisable to use lime that has been slaked some time.