ae made larger, and consequently with greater precision, the 
_ in the field of view subtended by the circles being dependent on 
3 the radii and focal length. The size of the object-glass, 1}ineh, | 
ae Re wines Sm to see the two stars, which are respectively 
5D and 6 itude, when a full moon was mee oe 
cf r i i ay 
-_ illumination. The stars can be seen dist tinctly in ae telescope : 
- under the above conditions, notwithstanding a slight loss of light 
_. caused by the addition of the glass diaphragm, but the outer cirdé — 
Be _-is somewhat too close to the edge of the field of view, and I intend 
_ to remedy this defect by having the focal length slightly decreased. 
g to the annual change and sce for time of the yeat 
ot the south polar distances of o Octantis and Oct. B.A.C., 7020, 
: ‘of one outer and one inner seuthg two circles close together 
a a have pad substituted for the outer drdle, and two circles clos 
together substituted for the inner. Convenient radii for the | 
_ gireles for the years 1883 to 1891 are 44’ 20” and 43’ 20°; for ~ 
inner circles for the same years, 38’ an 
