FACTORS FOB REDUCTION OF TRANSIT OBSERVATIONS. 217 



Table XXVIII. — Factor* for reduction of tra/nsH observations. 



[Extracted from Appendix 14, u. S. ('oast and Geodetic Survey Report for 1880.] 



To find A enter left-hand column with the zenith distance; ita intersection with declination column "ives azimuth 

 tor. 



To find 1! enter right-hand column with the zenith distance; its Intersection with declination column gives level factor. 

 c is given on Last line of each section of the table. 



Azimuth factor A=sin i sec. <V Star's declination ± i. Inclination factor B=cos ( sec. i. 



