Cast Iron Cement

Clean borings or turnings of cast iron 16; sal ammoniac, J; Hour of sulphur, 1 part; mix them well together in a mortar; and keep them dry. When required for use, take of the mixture, 1; clean borings, 20 parts; mix thoroughly, and add a sufficient quantity of water. A little grindstone dust added improves the cement.

Cement For Steam Pipe Joints, Etc., With Faced Flanges

White lead, mixed, 2;: red lead, dry, 1 part; grind, or otherwise mix them to a consistence of thin putty; apply interposed layers with one or two thicknesses of canvas, or gauze wire, as the necessity of the case may be.

How To Joint Lead Plates

The joints of lead plates for some pur-poses are made as follows: The edges are brought together, hammered down into a sort of channel cut out of wood, and secured with a few tacks. The hollow is then scraped clean with a scraper, rubbed over with candle grease, and a stream of hot lead is poured into it, the surface being afterwards smoothed with a red hot plumber's iron.

How To Joint Lead Pipes

"Widen out the end of one pipe with a taper wood drift, and scrape it clean inside; scrape the end of the other pipe outside a little tapered, and insert it in the former, then solder it with common lead solder as before described; or, if it requires to be strong, rub a little tallow over, and cover the joint with a ball of melted lead, holding a cloth (2 or 3 plies of greased bed-tick) on the under side; and smoothing over with it and the plumber's iron.

How To Prevent Deposits Of Lime In Boilers

Throw into the tank or reservoir from which your boiler is fed, a quantity of rough bark, in the piece, such as tanners use, sufficient to turn ]the water of a brown color; if you have no tank, put into the boiler from a half to a bushel of ground bark when you blow off; repeat every month, using only half the quantity after the first time.

Scaling Cast Iron

Vitriol, 1 part; water, 2 parts; mix and lay on the diluted vitriol with some old cloth in the form of a brush, enough to wet the surface well; after 8 or 10 hours, wash off with water, when the hard, scaly surface will be completely removed.

Varnish, For Smooth Moulding Patterns

Alcohol, 1 gallon; shellac, 1 lb.; lamp or ivory black, sufficient to color it.

Cast Iron Ornaments are rendered susceptible of being finished with :v scraper, where they cannot be reached with files, after having the above liquid applied to them.

Iron Lustre is obtained by dissolving a piece of zinc with muriatic acid, and mixing the solution with spirit of tar, and applying it to the surface of iron.