_Printers’ Ley._—No. 2.—Boil 3 gallons of water in a copper; throw in while boiling ½ lb. of unslacked lime and 2 lbs. of common soda; stir well for fifteen minutes. Let it settle till cold, when it must be taken out without disturbing the sediment, and the liquid is then fit for use. _Printers’ Ley._—No. 3.—Table salt 2 oz., unslacked lime 2 lb., Scotch washing soda (bruised) 2 lb. Put together in 3 gallons of water, stir well; when settled, ready for use. NOTE.—This ley, if prepared carefully, is very strong, and will wash off almost any colour. * * * * * _A Strong White Paste._—Dissolve 2½ oz. of gum-arabic in 2 quarts of water, and stir it into 1 pound of wheat flour until the whole becomes of a pasty consistency. It is then to be heated, and 1½ oz. each of sugar of lead and alum dissolved in a little water added thereto, and the composition well stirred until it shows signs of boiling, when it must be removed from the fire. Add while hot 6 drops of carbolic acid. This is a very tenacious and durable paste, and may be used on almost any substance. * * * * * _Pastes for Fixing Labels on Glass._—No. 1.—Take of gum-arabic 1 oz., boiling water and glycerine 2 fluid ounces each. Make a solution. No. 2.—Take of gum-arabic and powdered gum tragacanth ½ oz. each, water 1½ oz., acetic acid 20 drops. Mix. The acid is used to prevent chemical change, although a stiff paste made of tragacanth alone is not inclined to spoil by fermentation. * * * * * _To Make a good Mucilage._—The best quality of mucilage is made by dissolving clear glue in equal volumes of water and strong vinegar, and adding one-fourth of an equal volume of alcohol, and a small quantity of a solution of alum in water. The action of the vinegar is due to the acetic acid which it contains. This prevents the composition from gelatinizing by cooling; but the same result may be accomplished by adding a small quantity of nitric acid. Some of the preparations offered for sale are merely boiled starch, or flour, mixed with nitric acid to prevent the gelatinizing. * * * * * _Liquid Glue._—Take some good strong glue and mix it with full proof whisky. Let it digest for three or four days, and it will be ready for use. * * * * * _Strong Mucilage._—The _Journal de Pharmacie_ states that if, to a strong solution of gum-arabic measuring 8⅓ fluid oz., a solution of 30 grains of sulphate of aluminium dissolved in ⅔ of an oz. of water be added, a very strong mucilage is formed, capable of fastening wood together, or mending porcelain or glass. * * * * *