450 SUPPLEMENT 



quarters, in the quadrant e f; and right lines should be 

 drawn through these division-marks in the quadrant, to the 

 arms of the cross ; in order to determine the places there- 

 on where the sub-divisions of the hours must be marked. 

 This is a very simple kind of universal dial ; it is 

 very easily made,, and will have a pretty and uncommon 

 appearance in a garden. I have seen a dial of this sorb 

 but never saw one of the kind that follows. 



A universal Dial, shewing the Hours of the Day by a 

 terrestrial Globe, and by the Shadows of several Gnomons, 

 at the same time : together with all the Places of the 

 Earth which are then enlightened by the Sun ; and tkose 

 to which the Sun is then rising, or on the Meridian, or 

 Setting. 



This dial (see Plate IX.) is made of a thick square 

 piece of wood, or hollow metal. The sides are cut into 

 semi-circular hollows, in which the hours are placed ; 

 the stile of each hollow coming out from the bottom 

 thereof, as far as the ends of the hollows project. The 

 corners are cut out into angles, in the insides of which, 

 the hours are also marked ; and the edge of the end of 

 each side of the angle serves as a stile for casting a 

 shadow on the hours marked on the other side. 



In the middle of the uppermost side or plane, there is 

 an equinoctial dial ; in the center whereof, an upright 

 wire is fixed, for casting a shadow on the hours of that 

 dial, and supporting a small terrestrial globe on its top. 



The whole dial stands on a pillar, in the middle of a 

 round horizontal board, in which there is a compass and 

 magnetic needle, for placing the meridian stile towards 

 the south. The pillar has a joint with a quadrant upon 

 it, divided into 90 degrees (supposed to be hid from 

 sight under the dial in the figure,) for setting it to the 

 latitude of any given place ; the same way as already 

 described in the dial on the cross. 



