58 



PROCEEDINGS OF THE CALIFORNIA 



The President communicated to the Academy, by the authority 

 of .the Superintendent of the Coast Survey, the following mem- 

 oranda : 



Determination of the Difference of Longitude, by the Electric Tele- 

 graph, BETWEEN THE U. S. COAST SURVEY STATIONS AT SAN FeANCISCO, 



California, and Seattle, Washington Territory. 



s. s. 



Correction for personal equation — 0.02 + 0.01 



S. U. 



Resulting difference of Longitude = 18. 42 ± .02 



H. M. S. S. 



Telegraphic Longitude of San Francisco station 8 09 38.35 + 0.08 



Hence Longitude of Seattle 8 09 19.93 + 0.08 



OrinArc 122° 19' 58.59 ±1.2' 



Observer at San Francisco, George Davidson. 

 Observer at Seattle, S. E. Throckmorton, Jr. 



Communicated to the California Academy of Sciences by authority of the 

 U. S. Coast Survey, April 17th, 1876. 



