Word: bulb
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...hold cast-iron tunnel sections 44 ft. in diameter. When all the cast-iron rings had been linked together, cement was pumped under pressure into a one-foot space around the gigantic metal tube. Lighting for the tunnel will be divided between two power stations, each illuminating alternate bulbs so that if one station fails, every other bulb will keep shining...
...bell rang. Between two spheres the size of grapefruit leaped an electric flash. The gap was only six inches, but the flash was blinding, the report thunderous. The voltage was not extraordinary (150,000), but the amperage was?250,000. The current used by a 40-watt incandescent bulb is about one-third of an ampere. Two hundred fifty thousand amperes is a greater current than man has ever produced, a greater current than natural lightning...
...Harrington took a look at the Gastro-Photo, grew nervous. "Open your mouth wide," commanded Dr. Falenks, forthwith thrusting into his mouth a metal cylinder two inches long and one-half inch thick, attached to a long rubber tube. Punctured by 16 pinholes, the cylinder contained a tiny flash bulb and two pieces of film...
...Swallow," said Dr. Falenks. Henry Harrington's sharp adam's apple bobbed twice and the camera was in his stomach. Dr. Falenks squeezed a rubber bulb in his left hand, sent a puff of air down the tube to distend the patient's stomach walls. Then he pressed a button in his right hand. A metal shutter clicked open the 16 pinholes, Henry Harrington's dark interior flared up with the brilliance of 20,000 candles and in 1/120th of a second 16 views of his stomach were registered on the films...
...vast and various lore, oceanographers must record temperatures not only at the surface but at considerable depths. Nearly a century ago a Frenchman named Aimé used a "reversing thermometer" for taking depth temperatures in the Mediterranean. This instrument had a constriction in the tube above the bulb. Having been lowered to a measured depth, it was flipped upside down by some such expedient as slipping a weight down the line to actuate a lever at the end. This upset broke the thread of mercury at the constriction, preserving the temperature record until the instrument could be hauled...