Old clocks and watches & their makers : being an historical and descriptive account of the different styles of clocks and watches of the past, in England and abroad, to which is added a list of nearly twelve thousand makers (1922)
Britten, F. J. (Frederick James), 1843-1913, Britten, Annie · London : E. & F. N. Spon · leaf 23
ian Dial. 6 Old Clocks and Watches and their Makers the centre of the discs shadow not only indicates accurately solar noonwhen it is bisected by the central vertical line, but also approxi-mately mean solar noon when it is centrally over a hne of thefigure-of-8 loop which allows for the equation… … Fig. 2.—Curious INIeridian Dial. day is interpolated every fourth year, the exact equation in each yearof the four is different; still the approximate equation would bepractically sufficient for all but scientific purposes. The art of dialhng is somewhat complex. A glance at the figureon the next…
Clocks and watches · Clock and watch makers
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