The book of sun-dials; originally compiled by the late Mrs. Alfred Gatty; now enl. and re-edited by H. K. F. Eden and Eleanor Lloyd (1900)
Gatty, Alfred, Mrs., 1809-1873, Eden, Horatia K. F. Gatty, Lloyd, Eleanor, Evans, Lewis · London, G. Bell · leaf 226
e, as shown on the outerdisc, and then to adjust the gnomon to the season of the year. In thedrawing it is shown set for about latitude 52°, and for one month fromthe winter solstice, that is, about the 25th of January or November, When the dial was thus set it was allowed to hang from a… … 192 SUN-DIALS show the number of hours before or after noon up to six : for the earlymorning and late evening hours a modification of the setting wasneeded. When the dial is used in the forenoon set in this way, and theshadow falls exactly along the hour circle, the plane of the discs lies…
Sundials
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