The acid syphon pump, shown in Fig. 548 below, is used by many chemical works, in lifting their acids and other chemicals to be conveyed to any part of the building. The machine is made of lead, encased in an iron shell for strength, and fitted with a platinum steam nozzle to give that part durability.

This device is named a syphon pump because it becomes a syphon by turning down the delivery pipe and making that end longer than the suction end. The apparatus, shaded in the figure, is really a jet pump and it is simply used to operate the syphon, i.e., by turning on the steam the acid will flow through the syphon. At this point the steam should be shut off and the flow of acid will continue.

Noiseless Water Heater. This instrument, Fig. 549, is used for warming of liquids; it avoids the noise that is otherwise caused by the action of steam led for that purpose direct into cold liquids.

In operation, the liquid is drawn through the holes in body and discharged through shank, causing a circulation of the liquid in tank.

Table of Dimensions.

Water Pressure Ejector. This instrument, Fig. 550, is worked by water pressure and used to advantage in excavations, cellars, etc., where water pressure can be had and the required elevation does not exceed 12 feet. It has to be inserted into the water pressure pipe in such a manner that it will be entirely covered by the water to be raised. It will raise double the quantity of water which it obtains from the pressure pipe, i.e., it will deliver two gallons for every one it receives from the pressure pipe.

Table of Dimensions.