Frosts
Sir, —From work that I have done, I have found that the type of thermometer is of considerable importance in the measurement of frosts. The standard type of thermometer used by the New Zealand Meteorological Service to re cord frosts is of a tubulai construction and is not sup- ! ported by any plastic or metal frame. However, the type of thermometer most often used by lay pebple is the so-called “maximum and minimum" thermometer. This has a i plastic or metal frame, upon ■ which the tubular part of the | thermometer rests on an aluI minium plate. This effectively I ensures that the bulb of the thermometer is not correctly I exposed as stated by Mr A. P. i Ryan. I have found, and I refer this to Mr Ryan, that on [ the average the “maximum and minimum” type of thermometer records one to two degrees lower (hence giving a higher frost reading), than does the standard tubular type. This, I feel, would be of interest to your correspondent, “Jack Frost.”—Yours, etc.,
M. A. SPARK. June 9, 1970.
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Bibliographic details
Press, Volume CX, Issue 32320, 11 June 1970, Page 16
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178Frosts Press, Volume CX, Issue 32320, 11 June 1970, Page 16
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