458 A. Hall—Companion of Sirius. 
Auwers, is one-half the mass of Sirius, or if we assume Gylden’s 
parallax of Sirius, 0’°193, seven times the mass of our sun. 
J 
were begun in 1862 by Professor Geo. P. Bond, who found for 
that epoch 
p- 8. 
1862.19 84°61 10”-07 
My own observations for the last seven years, together with 
the residual found by comparing with Auwers’ predicted places, 
_are given in the following table: 
G3 6 
Date. Dp. #: pm Ag 
ee iene mee ear ree 
1874.23 58°-05 11"11 +7°-08 —0"19 
1875.28 56°38 11°08 +699 — 0°34 
1876.22 55°22 11:19 46°47 —0°65 
1877.26 53°38 10°95 +6°46 — 0°68 
1878.24 51°68 10°76 +6°24 —0-79 
1879.20 50°13 10°57 + 5°84 —O0°91 
1880.25 47-83 10°30 +5'81 1:08 
April 9, 1880. 
