How To pour a wet joint on soil pipe.

Occasionally it becomes necessary to pour what is termed a wet joint. When this occurs, get the joint as near tight as possible by driving home the oakum. Then put into the hub a teaspoonful of powdered rosin. Oil may be poured in if the rosin is not obtainable. This acts to prevent the hot metal from flying.

How To finish lead pipe work.

Rub with fine sandpaper, being careful to rub with the grain of the pipe. When this is done, cover at once with shellac.

Wash tray cement.

A good strong cement for mending wash trays is made of litharge and glycerine, made into a paste. This cement, when it sets, becomes exceedingly hard.

How To connect pipe when short of room.

It happens occasionally that pipes have to be put in where there is not room enough for either a union or right and left coupling, as for instance in the making of some coils. In such a case, saw an ordinary coupling in halves, and with a file true up one end of one of the half couplings. Then cut a long thread on the pipe, and after tapping out the coupling, screw it onto the long thread, with a gasket on the face of the half coupling. After screwing up the long thread sufficiently to get the pipe in the right position, turn it back, making a tight connection at the other end. Turning it back is apt to leave a questionable joint on the long thread, which is made tight by running the half coupling and gasket down onto the fitting that the long thread makes into.

How To bend brass pipe.

Secure the pipe in a vise between two blocks of wood and apply the torch at the point where the bend is to be made. When the pipe has been well heated, bend it at the proper angle. Previous to heating the pipe, fill it with sand and plug the ends.

Rubber cup for plaster of Paris.

For mixing plaster of Paris, a rubber bowl or cup will be found very handy, something after the shape of a rubber forcing cup, such as used by plumbers. After using, the old plaster left in the bowl is quickly cleaned off, merely by working the rubber.

How To wipe a wet joint.

When everything is in readiness for wiping, plug the ends of the pipe with bread. By quick work a joint can be wiped while the bread is soaking up the moisture, the only point being to finish the joint before the bread becomes saturated. After completing the joint, let on the water, which will quickly wash the bread out of the pipe.

Three Methods Of Heating Kitchen Boiler By Two Ranges.

Lead burning on a small scale.

For lead burning on a small scale, use a strong reservoir holding from one to two gallons, with a trap screw soldered into it, through which the reservoir may be charged. A tube should be placed on the upper part of this generator to which a three-eights inch rubber hose may be attached. Unless full precautions are taken against the confining of the pressure of the gas to the extent of danger, disastrous results may follow the use of crude apparatus of this kind. Therefore, if a regular gas generator cannot be obtained, an arrangement in the form of a safety valve of simple construction should be attached. This valve may be weighted to vent the reservoir at any desired pressure, which of course should not be made so high as to present any element of danger. As another precautionary measure, the gas when generated may be carried into gas bags made for the purpose. To the hose attach a blow pipe such as used by jewelers.

Chips of either old or new zinc are now placed in the reservoir, after which in some earthen vessel are mixed water and sulphuric acid, one part acid to five or six parts of water being the proper proportion. Care should be taken to pour the acid into the water, and not the water into the acid, as there is danger of the latter mixture flying into one's face. Pour this mixture onto the zinc. Hydrogen gas, which is very explosive, is at once formed, and when mixed with oxygen and ignited, forms an intense flame.

This should usually be an oxyhydrogen flame, but for small work an airohydrogen flame will be found sufficient. This is obtained by the mixture of the hydrogen with the oxygen of the air as it issues from the blow pipe.

The flame issues in a fine needle-like form, and the process of burning is accomplished by playing the flame on the solder which is held over the seam to be burned. The object in lead burning is to form a tank or vessel entirely of lead without the use of solder containing tin, which is destroyed by many acids.

As a solder for lead burning, use strips of sheet lead, one-half inch in width, scraped bright, and greased with tallow.

Do not attempt to light the gas until the pressure has driven the air out of the reservoir. In this work, do not attempt to burn corner seams, but shape the lining so that the seams come squarely on the bottom or on the sides. It need scarcely be added, that apparatus especially constructed for the purpose, is preferable to that which has been described, and that the above simply represents a method in which small work can be done which will not warrant a great outlay for apparatus.

Lead burning with a soldering copper.

When the hydrogen flame cannot be had, lead can be burned together with the soldering copper oh small work. Use a 32 oz. hatchet copper and heat to a cherry red. Retin the copper as fast as the tinning burns off. Use narrow strips of sheet lead well greased with tallow, just as when burning with the hydrogen flame.