STANDARD GEODETIC DATA. 



323 



Siviilarhj at Mount Helena: — 



The Observed Azimuth of the reference 

 mark (Woods) = 



the same reduced to the sea level 



The mean correction to four adjusted direc- 

 tions at the station is — 0/'032 (ih 0/^3) . 



The angle between the mark and Mount 

 Diablo adjusted= 



Whence the Astronomical Azimuth, re- 

 ferred to Mount Diablo= 



189 18 IL 36 

 189 18 U. 37 



225 16 49. 51 



324 01 24. 86 



We have also the following table of adjusted directions 

 at these two stations: — 



Tables of resulting adjusted directions were prepared for 

 all stations, because the respective mean corrections are to 

 be applied to all other directions not yet adjusted before 

 they can be submitted to the process of the next figure ad- 

 justment which ordinarily is 6i a secondary character. 



For the standard Longitude of the triangulation about the 

 Yolo Base Line, we have to retain at present the telegraph- 

 ic longitude of San Francisco station at Washington Square, 

 /=8/^ 09m 38.34 sees, (see Coast and Geodetic Survey Report 

 for 1884, Appendix No. 11, p. 424) and derive from it for 



