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Scientific American, Vol. 29, No. 26 (December 1873) (1873)

leaf 10

An illustration from Scientific American, Vol. 29, No. 26 (December 1873), 1873, leaf 10
ur lines, whichare to be drawn through the center, B. The construc-tion of these quarter hour lines U shown between thehour lines of VII and VIII. In this way, all the morninghour lines can be constructed. The afternoon hour linesare found in a similar manner, except that they radiatefrom the… … earliest sunrise and latest sunset, in the latitude forwhich the dial is constructed. The style, Fig. 3, shouldbe made so as to have the angle B A C, equal to the lati-tude of the place. The base of the style should coverthe space B N F G. The dial should be carefully levelledand placed so that B N…

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