OF /)IAL1NG. 



447 



r*n dialing ; and to it fix its gnomon FG H, the edge of 

 the shadow from the side FG being that which shews 

 the time of the day. 



To this horizontal or flat board, join the upright board 

 E D C, touching the edge G H of the gnomon. Then, 

 making the top of the gnomon at H the center of the 

 vertical south dial, describe a south dial on the board 

 EDC. 



Lastly, on a circular plate / K describe an equinoc- 

 tial dial, all the hours of which dial are equidistant from 

 each other ; and making a slit c d in that dial, from its 

 edge to its center, in the XII o'clock line ; put the said 

 dial perpendicularly on the gnomon F G, as far as the 

 slit will admit of; and the triple dial will be finished; 

 the same gnomon serving all the three, and shewing the 

 same time of the day on each of them. 



A universal Dial on a plain Cross. 

 This dial is thus represented : and is inoveable on a 



joint C, for elevating it to any given latitude, on the 

 quadrant C 090, as it stands upon the horizontal board 



