Several illustrations and drawings have been added to aid the description of the Dean system of electrical control of gate valves. ... The pamphlet emphasizes numerous applications of electrical heat by means of flat standardized heaters, two feet long, 3/16aquot; thick and 1%a wide. ... After sealing, the heater is placed in an hydraulic press and 25 tons pressure applied. ... Mazda Lamps, a aMultiple Mazda Lamps, a Industrial Lightinga by Ward Harrison and N. N. Magdsick, aMazda Lamps foranbsp;...
|Title||:||Journal of Electricity|