Soldering Liquid

Into hydrochloric acid place as much scrap-zinc as it will dissolve, still leaving a sponge of zinc. Use the mixture for soldering brass-work. To solder cast or wrought iron, add sal-ammoniac; and for sheet-tin work, omit the sal-ammoniac.

Jewelers' Solder

Melt 1 part lead, add 2 parts tin, and throw in a small bit of resin as a flux. This is strong, easily flowing, and white. In soldering fine work, wet the parts to be joined with muriatic acid in which as much zinc has been dissolved as the acid will take up. It is cleaner than the old method of using Venice turpentine or resin.

Silver Solder

Put into a clean crucible, silver 2 parts, clean brass 1 part, with a small piece of borax. Melt and pour into ingots. Solder made from coin, as it frequently is, often meets with difficulty around the joints, requiring the use of the file to remove it, while the addition of any of the inferior metals to the solder causes it to eat into the article joined by it.

How To Clean Steel And Iron From Temporary And Slight Rust

Cocoanut husks are better than waste and turpentine.

Chrome Steel

This metal is not only one third stronger than any other steel, but can be produced at a small cost, from the fact that when worn out, as in a steel-headed rail, it has a market value, as it can be made over again, which is not the case with Bessemer or any other cast-steel. It will also weld without borax or flux, and when burnt can be redeemed on the next heat.

How To Bronze Polished Steel

To 1 pint methylated spirits add 4 ozs. gun shellac and 1/2 oz. gum-benzoin; put the bottle in a warm place, shaking it occasionally. When dissolved and settled, decant the char liquid and keep it for line work. Strain the residue through a fine cloth. Take 1/2 lb powdered bronze green, varying to suit the taste with lampblack, red ochre, or yellow ochre. Take as much varnish and bronze-powder as required, and lay it on the article, which must be thoroughly clean and slightly warm. Add another coat if necessary. Touch up with gold-powder according to taste, and varnish over all.

Protecting Steel From Rust

Paraffine is the best material for polished steel or iron.

Cutting Steel Rails

Remarkable results have been obtained with a disk made from a rail-saw and rotated at 3000 revolutions per minute. As the disk was 9.6 feet in diameter, the velocity of its circumference was in the neighborhood of 8(3, 400 feet per minute. Steel rails were cut with astonishing rapidity, and even melted. Millions of sparks were thrown off, but no heating of the disk could be detected after the cutting.

Removing Tin From Copper Vessels

Immerse the articles in a solution of blue vitriol.