126 



BULLETIN OF THE 



From the best chart extant of Plover Bay, which has been referred 

 to above, and which is one published in 1877 by the Russian Hy- 

 drographic Office from surveys by Lieut. Onatsevich', we find Bald 

 Head to be one and a half minutes south and one minute easl of 

 the Coast Survey Astronomical Station. Hence, according to Lieut. 

 Davison, the Coast Survey Astronomical Station is in 



Latitude, 64 25/5 N. 

 Longitude, 173 16 W. Gr. 



As the observations were made, not on the mountain, but on the 

 vessel at anchor in the harbor, it seems probable that in trans- 

 ferring the position of the vessel to the mountain some mistake 

 occurred, for the resulting latitude is certainly considerably in error. 



The next determination of position at Plover Bay was by Prof. 

 Hall, in 1869, during his visit to this place to observe the total solar 

 eclipse of that year. The latitude was determined with a Pistor 

 and Martin's sextant from observations upon August 3, 4, and 5, 

 by Prof. Hall and Mr. J. A. Rogers. The following table gives the 

 results : 



For determining the longitude Prof. Hall had ten chronometers 

 whose corrections to Greenwich time were determined at the Astro- 

 nomical Station in the Navy Yard on Mare Island, California, 

 before setting out and returning from Plover Bay. The dates of 

 the time determinations at Mare Island, are June 17-20, and Sep- 

 tember 18-19, 1869, the interval being 102 days. The time was 

 determined with a small portable transit instrument. With these 

 means Prof. Hall obtained the following results for the longitude 

 of his station in Plover Bay, west from the station at Mare Island. 



