2217. Cement for Iron

2217.    Cement for Iron. An excellent cement is made by mixing equal parts of sifted peroxide of manganese and well-pulverized zinc white, adding a sufficient quantity of commercial soluble glass to form a thin paste. This mixture, when used immediately, forms a cement quite equal in hardness and resistance to that given in the last receipt.

2218. Cement for Uniting Stone, Derbyshire Spar, etc

2218.      Cement for Uniting Stone, Derbyshire Spar, etc. Melt together 4 ounces resin, 1/2 ounce wax, and about an ounce finely-sifted plaster of Paris. The articles to be joined should be well cleaned, then made hot enough to melt the cement, and the pieces pressed together very closely, so as to leave as little as possible of the composition between the joints. This is a general rule with all cements, as the thinner the stratum of cement interposed the firmer it will hold.

2219. Cheap Artificial Building Stone

2219.       Cheap Artificial Building Stone. A large number of houses have been constructed in Paris, for workmen, of the following materials: 100 parts plaster of Paris, 10 parts hydraulic lime, 5 parts liquid glue, and 500 parts cold water, are intimately mixed and poured into moulds of any desired size and shape; and in half an hour the form can be removed. The stones are then exposed in the open air for 2 weeks, until they are thoroughly dry. Artificial stone thus prepared, has the ring and hardness of the native rock; and, where the materials are abundant, is said to be 25 per cent, cheaper than quarried stone.

2220. Simple and Useful Cement

2220.     Simple and Useful Cement. Alum and plaster of Paris, well mixed in water and used in the liquid state, form a hard composition and also a useful cement.

2221. Cement for Fastening Instruments in Handles

2221.    Cement for Fastening Instruments in Handles. A material for fastening knives or forks into their handles, when they have become loosened by use, is a much-needed article. The best cement for this purpose consists of 1 pound resin and 8 ounces sulphur, which are to be melted together and either kept in bars or reduced to powder. 1 part of the powder is to be mixed with 1/2 a part of iron filings, fine sand, or brick-dust, and the cavity of the handle is then to be filled with this mixture. The stem of the knife or fork is then to be heated and inserted into the cavity; and when cold it will be found firmly fixed in its place.

2222. Cement for Fastening Iron to Stone

2222.     Cement for Fastening Iron to Stone. Glycerine and litharge stirred to a paste, hardens rapidly, and makes a suitable cement for iron upon iron, for two stone surfaces, and especially for fastening iron to stone. The cement is insoluble, and is not attacked by strong acids.