The boy's own book of indoor games and recreations : a popular encyclopædia for boys (1890)
Stables, Gordon, 1840-1910, Hutchison, George Andrew, 1841-1913 · Philadelphia : J.B. Lippincott · leaf 358
is dial is the same, asregards the axis of the earth, as Fig. lo. Fig. 12 represents what I call the trough-shapeddial. It is made of metal-plate bent into the shapeof a half-tube; the ends are closed with semicircularmetal plates. The interior is divided into twelveequal parts by lines running… … Fig. 12 Style.of the serve for theand directionThis is the one constant condition of all dials, that 2 A 354 HOIV TO MAKE A SUNDIAL, the edge of the style that is to cast the shadow must be parallel to the axis of the earth. Fig. 13 is a very simple dial, and is the last I shalldescribe. It…
Games · Amusements
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