Transparent Cement. Unite 1 ounce of india rubber, 67 ounces of chloroform, and 40 ounces of mastic. This is to be kept together for a week, and stirred at times, when it will be ready for use.
To Attach Cloth to Metal. Water 100 parts, sugar 10 parts, starch 20 parts, and zinc chloride 1 part. This must be first stirred and made free of lumps, and then heated until it thickens.
United States Government Gum. Dissolve 1 part of gum arabic in water and add 4 parts of sugar and 1 part of starch. This is then boiled for a few minutes, and thinned down as required.
TO MAKE DIFFERENT ALLOYS.--Silver-aluminum. Silver one-fourth part, and aluminum three-fourth parts.
Bell-metal. Copper, 80 parts; tin, 20 parts. Or, copper, 72 parts; tin, 26 parts; zinc, 2 parts. Or, copper 2; 1 of tin.
Brass. Copper, 66 parts; zinc, 32 parts; tin, 1 part; lead, 1 part.
Bronzes. Copper, 65 parts; zinc, 30 parts; tin, 5 parts. Or, copper, 85 parts; zinc, 10 parts; tin, 3 parts; lead, 2 parts.
German Silver. 52 parts of copper; 26 parts zinc; 22 parts nickel.
For Coating Mirrors. Tin, 70 parts; mercury, 30 parts.
BOILER COMPOUNDS.--To prevent scaling. Use common washing soda, or Glauber salts.
TO DISSOLVE CELLULOID.--Use 50 parts of alcohol and 5 parts of camphor for every 5 parts of celluloid. When the celluloid is put into the solution it will dissolve it.
To Soften Celluloid. This may be done by simply heating, so it will bend, and by putting it in steam, it can be worked like dough.
CLAY MIXTURE FOR FORGES.--Mix dry 20 parts of fire clay, 20 parts cast-iron turnings, one part of common salt, and 1/2 part sal ammoniac, and then add water while stirring, so as to form a mortar of the proper consistency. The mixture will become very hard when heat is applied.
A Modeling Clay. This is made by mixing the clay with glycerine and afterwards adding vaseline. If too much vaseline is added it becomes too soft.
FLUIDS FOR CLEANING CLOTHES, FURNITURE, ETC.--For Delicate Fabrics. Make strong decoction of soap bark, and put into alcohol.
Non-inflammable Cleaner. Equal parts of acetone, ammonia and diluted alcohol.
Taking dried paint from clothing. Shake up 2 parts of ammonia water with 1 part of spirits of turpentine.