Academy of Sciences.] 

 No. 2.] 



(476) 



INDIVIDUAL DETERMINATIONS. 

 74 Orionis, 6 h ll m , +12° 18'. 



11 



+12.80 c+ 32.40 »+ 0.81 ir=+ 0.0624 mm. c=+0.0012 mm. 

 +353.44 +10.43 =+ .5591 yn=+ .00140. 



+10.41 =+ .0432 *■= + .00266. 



Probable error for unit weight, ± .0014 mm. = ±".020. 

 Annual proper motion in R. A., + ".074 ±".005. 

 Relative parallax, + ".039±".006. 



The spectroscopic determination of this parallax at Mount Wilson yields +0".046. 

 gives +0".091 for the proper motion. 



Boss 



(477) 



Groombridge 1214, 6 h 37 m , +40° 44'. 



+14.90 c- 7.35 yu- 0.77 ir=- 0.0025 mm. e= -0.0004 mm. 

 +112.95 + 4.84 =- .0461 ^=- .00045. 



+11.36 =+ .0020 tt=+ .00034. 



Probable error for unit weight, ± .0015 mm. = ±".022. 

 Annual proper motion in R. A., — ".024 ±".008. 

 Relative parallax, + ".005 ±".007. 



Other determination of this parallax are: Jost, -0".011 ±0".026; Mount Wilson (spectro- 

 scopic), + 0".005. Porter gives -0".017 for the proper motion. 



