[2075]. Compound cylinder drill, fluted, and provided with oil channel.
[2076]. Boring bar head.
[2077]. Tool holder for lathe, shaper, or planer tools.
Section 25.—CONDENSING AND COOLING.
(See also [p. 66].)
[2078]. Klein’s atmospheric cooler. The hot water is sprayed against the upper surfaces of a number of vertical metal sheets, and trickles down into a trough. The natural circulation of air between the sheets, combined with a partial evaporation, cools the water to as low as 20° below normal temperature.
[2079]. Injector condenser, with hot well, foot valve, and air pump.
[2080]. Cooling fountain and trays for condenser water.
Cooling ponds of area proportionate to the quantity and temperature of the water, are used to cool condenser water where the supply is limited.