COMSTOCK STUDIES IN ASTRONOMY 



105 



tive for a star west of the meridian and negative for a star 

 east of the meridian. 



Similar tables may be constructed for the difference of 

 azimuth of the stars, but the direct computation by (19) 

 and (21) is so simple that little advantage would be derived 

 from them. 



To illustrate the use of the tables we make the following 

 computations for a comparison of Polaris with p Leonis 

 west of the meridian and d Herculis east of the meridian: 



<P 43 4.6 



h, m. 



1 18.9 



The azimuth of Polaris corresponding to the times above 

 computed is, in minutes of arc, 15 sec 9- MJ. 



For a determination of time only, the latitude being sup- 

 posed known or not required, the observation of the polar 



