182 Journal of the Asiatic Society of Bengal. [N.S., XV, 
In figure 6 let X be the position of the moon at the 
moment of opposition, then N XS is the circle of position and 
ce) 
moon, while the circle XZ’ at right angles to NXS marks the 
east and west direction. The angle NXP =CXE’ is the 
valana, which gives the directions of the ecliptic with reference 
(XE’). 
e at opposition, to 6 at last contact, and the problem is to 
find the locus of bed. 
Now make the angles EMa, eMN, and WMc equal to 
he valana at first contact, opposition, and last contact res- 
pectively, and make ab, Me and cd equal to the latitude of the 
centre of the moon at those times, due care being taken with 
reference to the directions. The points b, e, d are thus fixed 
and the circle drawn through these points is assumed to be the 
path of the centre of the shadow. — 
The Sérya Siddhanta concludes the section dealing with 
this subject with the caution that “This mystery of the gods 
is not to be imparted indiscriminately.” 
