Cold storage, heating and ventilating on board ship (1911)
Walker, Sydney Ferris · New York : Van Nostrand · leaf 192
IE- Unit with SmoothSurface ■\TING ELEMENTS. HEATING APPARATUS WITH LOOSE POWDER. 183 NON-LUMINOUS HEATING APPARATUS WITH LOOSE POWDER. There is another form of electric heating apparatus, whichhas been developed in Germany, principally, in which a loosepowder is employed, the necessary resistance… … FIG. 29.—CIRCUL.\R ELECTRIC HEATER. FIG. 30. BATTERY FOR SAME. composed and partly by the fact that the substance is in apowder, or in loose grains. A loose powder, or loose contactbetween any two conductors, across which an electric currenthas to pass, always offers a considerable resistance over…
Ships -- Heating and ventilation · Cold storage on shipboard
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