Word: ascertains
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Dates: during 1920-1929
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...exhausted glass vessel, that not only X-rays were formed (by the impact of the electrons upon the electrodes) but also other rays, composed of streams of electricity from the negative electrode, or cathode. His voltages were weak, however, and his tube clumsy. He was never able to ascertain much about these "cathode rays" because he could not get them outside their glass container to experiment with them...
...Each day we dropped for a period of from three-quarters of an hour to two hours under the sea, where Dr. Vening Meinsz of the Dutch Geodetic Committee studied gravity under the water. He made pendulum tests daily to ascertain the truth or falsity of the German theory of floating continents leaving gravity deficiencies in their wakes. I might say that we found no evidence of a deficiency of gravity to support this hypothesis. These pendulum tests bored the crew...
...hundred to one in favor of men was the result of a straw vote taken in New York as well as other communities to ascertain whether men or women were more desirable as radio broadcasting announcers. One potent reason, according to many ladies' ballots, was that women prefer on weary mornings, to hear men's voices through their loud speakers. Women's voices also have too much personality, some ladies complained. Men did not object to this. They said women could not announce baseball scores and describe prize fights accurately. The real reason: men's voices...
What I wished to ascertain was the grounds upon which the distinction was made between "Women" and "Ladies"- whether racial, social or geographical...
...their antics before and after blowing through their cages, from clay pipes, puffs of smoke of Pennsylvania leaf tobacco. None of the rodents exhibited symptoms similar to those of small boys behind barns. On the contrary, the rats ran, jumped, squeaked more actively. Physiologist Field's object: to ascertain the probable effect of smoking on humans. After establishing that tobacco stimulates and produces increased activity, she proposed to investigate the popular notion that the after effects of smoking are depressing...