Word: thyratron
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...million amateurs. Of these, about 28 million are "casual," 5,000,000 are "serious" and 2,000,000 are "expert." The casual amateur is the one who takes a picture of his baby from 20 feet away, forgets to wind his film, and cannot tell a thyratron from a réseau.† He is looked down on by experts, but it is he who provides the vast ground swell of enthusiasm for photography, and he has helped pile up the statistics of photography's tremendous growth...
...where they heard learned discourse. Dr. Albert Wallace Hull of General Electric described two meticulous counters:1) the device of Dr. Merle Anthony Tuve of the Carnegie Institution (TIME, Feb. 8), which measures a current of one electron per second, smallest current measured so far; 2) the device (including thyratron tubes) of Dr. Wynn Williams of Cambridge University, England, which counts alpha particles (nuclei of helium atoms) as they explode from radium at a speed of 12,000 mi. per sec., and ten microseconds apart. (A microsecond is one-millionth of a second.) Dr. Kenneth T. Bainbridge of Bartol Laboratories...
| 1 |