Word: reflectors
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Most widespread innovation for 1940 are the Sealed-Beam headlights on 95% of the models (result of cooperation between the industry, lamp & lens manufacturers). Lens, bulb and reflector are sealed into a single unit. The new lamps light the road without blinding. Another big development is the "Hydra-Matic" drive (see Oldsmobile), which dooms the clutch pedal, lets the accelerator control...
Yerkes has the world's biggest refractor (a telescope equipped with a lens instead of a mirror) but it is only 40 inches in diameter. For years Struve has pined for a big reflector. One day he walked into the office of University of Chicago's President Robert Maynard Hutchins, told him that the University of Texas had received a bequest of $800,000 for an astronomical observatory. The money had been left by William J. McDonald, a Texas farmer who acquired an interest in science during his youth, an interest he never lost though he became...
...star "haloes" extending the system for beyond the size astronomers have generally assigned to them were reported by Dr. Harlow Shapley, Paine Professor of Practical Astronomy and Director of the Observatory speaking before a symposium of distinguished astronomers at the dedication of the McDonald Observatory's new 82-inch reflector yesterday...
Professor Shapley spoke yesterday morning before a symposiumn of twenty leading astronomers, assembled at the dedication ceremonies of the new 82-inch reflector of the McDonald Observatory. Professor Shapley's paper dealt with the use of variable stars in studying structure and dimensions of stellar systems...
Harlowe Hardinge therefore invented a sensitive "electric ear" to replace human hearing. A parabolic reflector picks up the sound from the mill, focuses it on a microphone. If the sound is at the most efficient level, the microphone current keeps a galvanometer balanced between two contacts. If it rises or falls as little as one-quarter of a decibel, the galvanometer makes contact on one side or the other, closing a circuit which starts or stops the flow of ore as the situation requires. More than 75 of these electric ears are already...