Word: aneroid
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Dates: during 1930-1939
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...total weight of the radiosonde is only 18 ounces. Air pressure is obtained by a pair of small aneroid bellows; the temperature, by a bimetallic strip which coils with change in temperature; and the humidity, by a single human hair. Each of the three instruments is fitted with a needle which touches a wire, sending out a radio signal by means of a micro-transmitting set. The significance of the signals depends on the time between them. The measurement of this time interval by the operators on the ground provides all the needed information...
...clock cheap enough to be lost after every ascension and in finding an efficient propellor. This instrument carries, however, simply a screw thread whose grooves are filled with an insulating material. On this bears a contact attached to an evacuated box such as is used in an ordinary aneroid barometer. Every time the contact crosses a thread, a corresponding interruption occurs in the radio signal. This signal was received on a rotating drum. The distance between the interruptions and the number of them tells the speed of ascent and the height...
...away that Professor Coleman concludes these regions were invaded only at the very beginning of Pleistocene time (many hundreds of thousands of years ago). On some of the tablelands, to quote Coleman's words, "No signs of glaciation were seen above the edge of the escarpment at 970 feet (aneroid), and a walk of four or five miles inland over the rolling surface of the tableland reaching 1.908 feet (aneroid), showed only angular blocks of Archaean rock of local origin. No foreign boulders were found, and the conclusion was reached that the southern part of the Long Range had never...