Word: instrument
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Dates: during 1920-1929
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...grand piano is a commonplace, and it was curious how the great assembly in Carnegie Hall, Manhattan, stared at one last week as if the sleek, black, three-legged harp were some jungle animal. Some stared because they knew the secret of that sable instrument; others because their neighbors were staring. The latter had not read their programs...
...Hartsough Mirror-Scales are said to be 100 times as sensitive as the Eoetvos Balance, an instrument now in common use which determines the gravitational pull of sections of the earth's crust. Oil-bearing crust, being light, exerts slightly less gravity pull; ore-bearing crust, slightly more...
...vibration of traffic in Manhattan, even at dead of night, is sufficient to disturb so delicate an instrument. The test of Einstein's theory will be made "somewhere in Illinois." Thereafter, Prof. Hartsough will enlarge his scales and attempt to weigh molecules and atoms; and will consider commercial offers from people eager to try his instruments (he has made three) in locating oil and minerals...
...Multiplex System. Upon a 10-metre "carrier" wave, Mr. Hammond's multiplex sending instrument impresses modulations, much as a locksmith files teeth in a blank key. A set of eight modulations goes out with each compound signal of the set of eight messages. Physically, these modulations consist in alterations of the length of the carrier wave by fractions of a centimetre (down to 9.984 m., up to 10.016 m.). In the instrument that receives the multiplex or "scrambled" messages, one circuit is made sensitive to the carrier wave, other circuits to specific modulations thereon; much as the slot...
...success and almost universal approval the tutorial system has met with among students. But so long as a single tutor remains content to regard himself as one in kind with the hirelings of tutoring schools, the tutorial system at Harvard will fall short of its fullest service as an instrument in education; and the majority of unfortunates who go to such a tutor will continue to regard the divisional examinations as an added hurdle to be got over on the way to a degree...