RecordSunshine recorder< 1 of 1 > Back probably made in London
Sunshine recorderThis sunshine recorder was made around 1900, probably by L. Casella, a scientific instrument maker based in London. This form of instrument was devised in 1853 by J. F. Campbell (1821-85) of Islay and modified by George Stokes (1819-1903) in 1880. The device has a strip of paper, replaced daily, which records the burnt trace made by focusing the sun's rays by means of the solid glass sphere. A latitude adjustment was added to the design by 1885. A famous historian of meteorological instruments has written that 'the measurement of the duration of direct sunshine is more an attempt to quantify human feelings of well-being than a serious contribution to meteorological theory'. (Middleton, p 231). Record detailsTo search on related items, click any linked text below.
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