TABLE XXXII. 



The uncertainties in the determination of azimuth constant in the other two series 

 decided me to abandon all hope of a proper determination of this constant, and to make 

 use only of low stars to the south, i.e. just a little above the fixed mark. By confining 

 one's observations to stars of the same or almost the same southerly declination, the 

 azimuth does not need to be known with any great exactitude, so long as one can make 

 the apparently permissible assumption that the azimuth of the fixed mark remains 

 unchanged in the short period during which observations are being made. 



Actually the azimuth correction has been found, from calculation ot the observa- 

 tions, to be small but of uncertain sign ; and throughout has been applied the same 



48 



