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It was not until the development of the bialkali antimonide photocathodes ( potassium-cesium-antimony and sodium-potassium-antimony ) discovered by A. H. Sommer and his later multialkali photocathode ( sodium-potassium-antimony-cesium ) S20 photocathode discovered in 1956 by accident, that the tubes had both suitable infra-red sensitivity and visible spectrum amplification to be useful militarily.
Some Related Sentences
was and until
Her face was very thin, and burned by the sun until much of the skin was dead and peeling, the new skin under it red and angry.
He scuttled in shadow along the east wall of the stockade and then followed the south wall until he was at the rear of the two frame buildings.
I found a trooper once the Apache had spread-eagled on an ant hill, and another time we ran across some teamsters they'd caught, tied upside down on their own wagon wheels over little fires until their brains was exploded right out o' their skulls.
From the time the chocks were pulled until the plane was out of sight, he knew Donovan would keep his back to the strip.
From L'Turu, I heard that until about 1850 the people of this island -- which was about the size of Guam or smaller -- had been of both sexes, and that the normal family life of Melanesian tribes was observed here with minor variations.
The insurance man informed them that he had talked to Crumley who was all right and that he would watch the men's personal effects until they towed the rig back to town.
Ramey heard the words again inside, weakened, the way moving water sounds through a grove of trees, until he was not sure whether it was sound or light-headedness pressing in his ears.
The enemy came looming around a bend in the trail and Matsuo took a hasty shot, then fled without knowing the result, ran until breath was a pain in his chest and his legs were rubbery.
Dr. Lalaurie and I didn't even know he was in the house until the night of our ball when he came down the stairs ''.
Social Darwinism was able to stave off the incipient socialist movement until well into the present century.
Now, although the roots of the mystery story in serious literature go back as far as Balzac, Dickens, and Poe, it was not until the closing decades of the 19th century that the private detective became an established figure in popular fiction.
He gave us a simile to explain his admission that even at the worst period of his second illness it never occurred to him there was any renewed question about his running: as in the Battle of the Bulge, he had no fears about the outcome until he read the American newspapers.
His company then carried out a confused retreating movement until it was surrounded by the Germans, a few days before France capitulated.
was and development
And here again we hear the same refrain mentioned above: `` the paramount goal of the United States set long ago was to guard the rights of the individual, ensure his development, enlarge his opportunity ''.
Henrietta was discovering in the process of writing, as the born writer does, not merely a channel for the discharge of accumulated information but a stimulus to the development of the creative powers of observation, insight and intuition.
It was this fear which explained the development of a priestly caste whose function in society was to mollify and appease the angry deities.
the mere fact that he was selected, though as a substitute, to act as interlocutor or moderator for it, or perhaps we should say with Buck as ' father of the act ', is in itself a difficult phase of his development to grasp.
In 1957 the social-economic approach to European integration was capped by the formation among `` the Six '' of a tariff-free European Common Market, and Euratom for cooperation in the development of atomic energy.
The bank which held the mortgage on the old church declared that the interest was considerably in arrears, and the real estate people said flatly that the land across the river was being held for an eventual development for white working people who were coming in, and that none would be sold to colored folk.
In such a case, however, we would encourage the recipient country to get on with its programing task, supply it with substantial technical assistance in performing that task, and make it plain that an expansion or even a continuation of our assistance to the country's development was conditional upon programing progress being made.
Local industry's investment in Rhode Island was the big story in 1960's industrial development effort.
Another recent achievement was the successful development of a method for the complete combustion in a bomb calorimeter of a metal in fluorine when the product is relatively non-volatile.
Thus, in the last few years, a number of programs which looked very promising at the time their development was commenced have since been completely eliminated.
That development, in turn, formed the foundation of still more significant expansions in later years -- in gear cutting, in circular graduating, in index drilling, and in many other fields where accuracy was a paramount requirement.
Perhaps the outstanding standard bearer of Mr. Brown's tradition for accuracy was Mr. Oscar J. Beale, whose mechanical genius closely paralleled that of Mr. Brown, and whose particular forte was the development of the exceedingly accurate measuring machinery that enabled Brown & Sharpe to manufacture gages, and therefore its products, with an accuracy exceeding anything then available elsewhere in the world.
This increase was sufficient to overcome the effect on net income of higher costs of manufacture and increased expenditures on research and development.
The second really new development this year was a revolver handling a different sort of varmint load -- the
The earlier New Haven development was public housing, so it easily leaped over the problems met in a private venture.
A member of the IRSAC staff ( E. Van De Walle ) was recently delegated to cooperate with AIMO in the development of demographic statistics in this territory.
But the eagerly sought `` homogeneity '' of the Balafrej Council of Government was never achieved as the Istiqlal quarreled over foreign policy, labor politics and economic development.
With the development of the Red Bridge Subdivision south of Kansas City, Missouri, the developer was faced with the problem of providing adequate sewage disposal.
It was proposed that aerated lagoons be used to eliminate the problem at the existing oxidation ponds and to provide the necessary treatment for the additional development.
In vinyl foam, the big news was the development of techniques for coating fabrics with the material ( for details, see P. 395 ).