11 2

Description and XJse of the

counting so many degrees amongst the pa-rallels in the zodiac, either above or belowthe ecliptic, as her latitude is north or southupon the given day, and that will be thepoint which represents the true place of themoon for that time, to which apply theartificial moon.

196. Note, The artificial moon is a smallthin piece of brass in form of a crescent,having two holes a and b, fig. 28. throughwhich a small string of silk twist is put, thatit may flip backwards or forwards upon it.

To one end c of this silk siring is tied asmall piece of brass dec with three holes,at dec.

The manner of putting it upon the globeis this: first put the crescent a b, on thestring; and the piece of brass, by passingthe string through the two holes d, e, thestring being as yet left free. The two endsof the string being loose, pass the end Fround the north pole of the globe, in agroove made for that purpose, and- tie itinto a loose loop like F g, then put the otherend of the string G c round the south pole,and tie it fast to the hole at c : then by pull-ing the piece dec upwards, the string may

be