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T^y^DIANA UNIVERSITY STUDIES 



Mean 

 Temperature. 



No. of 

 Observations. 



Observed R. 



Computed R. 



Ro-Rc. 



76 



39.8 

 29.0 



5 

 3 

 3 



11.5365 

 11.5275 

 11.5291 



11.5369 

 11.5335 

 11.5358 



0.0004 

 0.0060 

 0.0067 



Taking the mean of the results of R obtained by the different 

 methods and the average of the temperatures, we get: 



Method. 



Mean 

 Temperature. 



Observed R. 



Computed R. 



Ro-Rf. 



^ Ursae Min. . 



of 37 and 38 

 51 Cephei 



76 



39.8 

 29.3 



11.5365 

 11.5275 

 11.5291 



11.5369 

 11.5245 

 11.5248 



0.0004 

 0.0030 

 0.0043 



Thus we see that the observed value of R and the value computed 

 by using the temperature coefficient agree reasonably well. 



Tabulation of Results. Following is tabulated, first, the ob- 

 servations giving the date, hour angle, the external temperature, the 

 temperature of the attached thermometer, the barometer reading, 

 the mean of micrometer readings when movable wire is to the left 

 of fixed wire (Mi), and when it is to the right (ilf i), the distance 

 in revolutions of the screw (Ar), and the distance in seconds of arc 

 (A'O- Next is given the corrections and factors computed for each 

 observation. Then, follow the conditional equations and the normal 

 equations, and lastly the value of annual parallax (p). 



The position angles of the comparison stars are as follows: 



a Andromedae. 268°. 2 



70 Ophiuchi - 102°. 4 



^ Lyrae 239°. 8 



f Germinorum 84°. 3 



y Canis Minoris 289°. 3 



8 Equulei 61°. 4 



yj Pegasi 337°. 4 



61 Cygni 37°. 0 



