which is carried mechanically by the water, is percentage of the light is absorbed. It is necessary, in run over ribs, behind which the sand is deposited. order to obtain the same illuminating effect, to have The water is then pumped back into the tank. lamps of higher candle power with.consequent… … result is, as a matter of fact, to increase the sand and gravel and stone substituted, thus THE SPIRAL-GLOBE LAMP DISMEMBERED. effective illumination of the lamp, the spirally- giving another class of phenomena. With the wound glass rod constituting a double convex aid of maps and contours, various…
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