Word: levels
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Dates: during 1930-1939
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...which cost $2,885,000 is the biggest bascule bridge in the world. Locally dubbed Centennial Bridge, the double-leaf structure is 331 ft. long, wide enough (108 ft.) for eight traffic lanes, rests its 18,400,000-Ib. on 32 caissons, sunk to bedrock, 102 ft. below water level. It is so delicately balanced that no more than two 100 h.p. motors are required to lift its huge jaws skyward for occasional vessels to pass in & out. of the Chicago River. Some Chicagoans were disconcerted by the two right angle turns at its southern approach, with only a four...
Today, America, cursed with "depression nerves" and insidious class prejudices, is mourning the loss of a man whose level-headedness and altruistic ideals would have helped us overcome our troubles, had he lived longer to carry on the work that he began so well...
...decibel is an arbitrary unit such that, starting from the zero level or threshold of hearing, each increase of one decibel represents an increase of 25% in the physical intensity of the sound. The human ear has an enormous range. It is not pained by loudness until the sound is about ten trillion times as intense as a whisper at the threshold of hearing. Thus it is not very sensitive to small intensity changes. The decibel is intended to represent roughly the smallest intensity change which the ear can detect...
...subjective measure of its apparent loudness to the ear. There has been some difficulty with phons in international exchanges of research results because in the U. S. the decibel was generally used as a loudness unit as well as an intensity unit and in England and Germany different zero levels, different frequencies for the reference tone and different listening techniques were in use. At a recent international conference in Paris these differences were ironed out and a standard phon scale agreed on involving a uniform listening technique, reference tone, and zero level. Some loudnesses measured on this scale are: ticking...
...crash of 1929. On war demand and business revival early this year they had a strong comeback until the speculative collapse in commodities in England coupled with President Roosevelt's statement that certain U. S. commodity prices were rising too fast. Now commodity prices are nearing the 1926 level. Four years ago President Roosevelt was said to favor maintaining the 1924-25 level by varying the gold content of the dollar. So the New Deal is now at the crossroads where it may soon, have to abandon its determination to hold commodity prices down, or to give...