286 Double-Stars discovered by Alvan G. Clark. 
No. 3. po Hydre. 
The very minute attendant to this star was detected with the 
Washington 26-inch refractor. The only measures I am ac- 
quainted with are those made with the 184-inch of the Dearborn 
Observatory. A mean of three observations is as follows: 
Burnham ..-.P=144°-9 D=12"-40 1878-0 3n 
No. 4. L 23271. 
A close and unequal pair discovered May 19, 1876, with the 
Vienna 12-inch object glass. The following are all the measures: 
Ur P=233°°6 D=0"-85 1876-4 3n 
Dembowski - 234°1 0°87 18774 2n 
No. 5. 46 Virginis. 
Discovered on the same evening as the preceding, and with 
the same glass. It is a fine pair, and just within the reach of a 
6-inch aperture. It has been measured as follows: 
POs oa P=158°: D=—1"'32 1876°4 37 
Dembowski - - 148°5 1°21 1877°4 2n 
Soe a 145°7 Id 1878°2 1m 
Burnham ---. 151°5 1°48 1878°3 2n 
The magnitude of the small star is rated 8 by Dembowski, 
9°5 by Stone, and 11 by Hall. 
In measuring this pair, a very faint companion, about 13th 
magnitude, was detected. 
Feeiie’s D=33"°86 1878°3 
No. 6. 
A difficult pair of small stars in a low-power field with 
o Bootis, np. It has been measured by Dembowski only, and 
the following is a mean of two observations : 
Dembowski...P=139°8 D=0"76 18770 2n 
This was also found with the Vienna glass. 
No. 7. & Corone. 
A very difficult and unequal pair discovered May, 1876, 
with the Washington 26-inch. The companion is an exceed- 
ingly minute point of light, even with a large a . 
Edgecomb, of Hartford, sees it with a 9-4-inch Clark refractor, 
but this must be regarded as a very remarkable test of acute 
vision. The following are all the measures 
all nna 2s hetb) Spee 14 1876-4 4” 
Burnham ..-- 360°2 1°86 18783 2n 
No. 8. 102 Herculis. 
A faint companion detected with the 12-inch Clark object 
glass now in the possession of Dr. Draper. The only measures: 
Burnham .... P=46°°9 D=23"-42 18784 In 
