.264. Afr. Hf.rsch£l on the 
ftoutli. preceding the fame ftar ; very exaflr, and by the fame 
kind of iiiiim'ination. Oft. 17, 1783, Diftance 6 ' $$ /f 7'" ? 
a fecond meafure 6 / 56" i\"\ as exact as poftible. Oct. 23, 
1 783, Portion 42 0 57' ; a fecond meafure 42 0 45'' ; fingle lens ; 
power 71; opaque- microfcopic-illumination. Nov. 14, 1783, 
.Diftance f .4." Nov. 12, 1 784, Diftance f 2 2" 35 7// ; 
Pofttioii ;8° 39ft Its diameter is about 10 or 1 . I have exa- 
mined it with the powers of 7 1, 227, 278, 460, and 932 ; 
and it follows the laws of magnifying, fo that its body is no 
iiiufton of light. It is a little oval, and in the 7-feet refle&or 
pretty well defined, but not fharp on the edges. In the 20-feet, 
of 18,7 inch aperture, it is much better defined, and has much 
of a planetary appearance, being all over of an uniform bright- 
nofs, in which it differs from nebulae : its light feems however 
to be of the ftarry nature, which buffers not nearly fo much as 
the planetary difks are known to do, when much magnified. 
The fecond of thefe bodies precedes the 13th of Flam- 
steed’s Andromeda about i 7 6 in time, and is 22 7 more fouth. 
It has a round, bright, pretty well defined planetary difk of 
about 1 2" diameter, and is a little elliptical. When it is viewed 
with a 7-feet refle&or, or other inferior inftruments, it is not 
nearly fo well defined as with the 20- feet. Its fituation with 
regard to a pretty confiderable ftar is, Diftance (with a com- 
pound glafs of a low power) 7' 5 1 7/ 34 /// . Pofition i 2 °o / f. 
preceding. Diameter taken with 278, 14" 4a 777 . 
The third follows B (Fl. 44-) Ophiuchi 4 7 ,i in time, and 
is more north. It is round, tolerably well defined, and 
pretty bright ; its diameter is about 3c/ 7 . 
piece, that may throw it back upon the wires. By this means none of the dirett 
rays can reach the eye, and thofe few which are refle&ed again from the wires do 
not interfere fenfibly with the fainteft objeds, which may thus be fecn undif- 
turbed, 
The 
