A speedometer for meteors that mea, sures the veloeity of ehooting stars has been developed at tho Harvard Obseyvatory, in Massachusetts (U.S.A.). The ingtrument consists of a special camera earrying a sot of fan ibladee in front? of the lens, arranged so that they in^ terrupt the pictuie 20 times a seeond. When a meteor dnshes iu front of Ihe eamera, its trail is cut 20 times to1 1 each seeand that it is in the field oi view, making the photographic imago a set of eegments. "When these segments are measured, it is possible to compute the speed at whieh the meteor wa* travelling.
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https://paperspast.natlib.govt.nz/newspapers/HBHETR19371206.2.111.2
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Hawke's Bay Herald-Tribune, Volume 81, Issue 62, 6 December 1937, Page 9
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105Page 9 Advertisements Column 2 Hawke's Bay Herald-Tribune, Volume 81, Issue 62, 6 December 1937, Page 9
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