Hobart, H. M. (Henry Metcalf), 1868-1946 ed · Philadelphia, J. B. Lippincott · leaf 139
centrated solution ofammonium phosphate. Only a short por-tion at the lower end of the cathode isutilised, the rest, which is rather smallerin diameter, being protected from actionby an enclosing glass sleeve. The currentdensity at the cathode ranges from 5 to 10 amp per sq dm. In the larger sizes… … Hg. a—Plan view of Nodon Valve adopted (which see). The maximum efii-ciency is obtained at about 140 volts, andthe efficiency lies between 65 and 75 per cent,and is practically independent of the fre*quency between the limits of 25 ~ and 200 ~.Above a pressure of 140 volts, the efficiency
Electrical engineering
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