Word: dropper
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Dates: during 1942-1942
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Common practice has been to deposit a small amount of mercury in each tube from a mechanical "eye-dropper," which was not very precise. Insufficient mercury, Cox explained, makes the light slump quickly; too much mercury produces blotches and discoloration. Hygrade's new process seals the mercury in long sections of thin nickel tubing, feeds the tubing into a precision machine which nips off "mercury bombs" of specified length, carries the "bombs" under a magnetic device which picks out of line and discards any capsule holding even 1/1,000 gram less than the amount required...