Word: molecular
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
Last week, Professor Karl T. Compton reported that he had put molecular hydrogen into a tungsten tube, heated it to 2,800 degrees Centigrade, thereby dissociating it into atomic hydrogen, and shot into this a current of electrons from a hot filament similar to those used in a radio tube. The energy of this current was readily reckoned in volts, and as the voltage was increased things began to happen to the hydrogen atoms it encountered. Suddenly they began to emit radiation of a definite wavelength, measurable as a single line in a light spectrum. The hydrogen atoms had been...
...fear expressed for the future is that some terrifically powerful gas will be invented which will paralyze cities, slay armies, but this is extremely improbable. Gases are divided into two classes: Those having heavy molecular weight; those whose molecules are light?the most volatile. The first, usually? vapors, can be absorbed by charcoal independently of their chemical composition; of the second, only a small proportion are poisonous and these are all known and can be guarded against. Irritant smokes present a different problem and may be invented in deadlier forms than are at present known but, as they are invented...
...Leonard began his experiments with carbolic acid, which, as is well known, kills disease germs and man with equal despatch. To resorcinol (very similar to carbolic acid) certain "fatty" acids were linked. The result was, at first, both an excellent antiseptic and a deadly poison. As the molecular proportion was changed, the antiseptic properties increased, the poisonous effect diminished. At last, with great difficulty, six atomical groups of the acids were united with the resorcinol, hexylresorcinol formed...
...Physical Colloquium. "The Molecular Attraction and Compressibility of Helium and Argon" by Mr. R. H. Kent, Room 25, Jefferson Physical Laboratory...
...Physical Colloquium. "The Possible Significance of Crystalline Form and Molecular Volume," by Professor Richards, in Jefferson, Room...