32 



Result adopted — Chronometer No. '2557, fast of si- //. m. s. 



dereal lime for this station (at 8/t. 02m.) + 1-27 40.92 



By compainson — Chronometer No. 141, was slow of 



mean scalar time for this station (at 8/i. 57?/?. 



mean time) - • - - • — 4 42. 5G 



10//f. 1859, March I5th. At the same Station. 

 Sidereal chronometer No. 2557, fast: 



1st Set. 



By 8 observations on y' Leonis, east h. m. s. 



(at 6/i. 32m.) - - - 1 28 34.1:3 



By 6 observations on >j Tauri, west 



(at 7/i. 00m.) - - - 1 28 33.48 h. m. s. 



ls^72e5?yZ«— Chronometer No. 2557, fast (at 6/i. 467/1.) + 1 28 33.80 



2d Set. 

 By 8 obs. on a Tauri, west, and 7 obs. 



on jS Tauri, also west (at 8//. 4Sm.) 1 28 33.88 

 By 12 observations on « Bootis, east 



(at 9/i. 48m.) - - - 1 28 34.51 



2c?i?fswZ^— Chronometer No. 2557, fast (at 9//. IS/w.) -f 1 28 34.20 



Result adopted — Chronometer No. 2557, fast (at 8A. 

 02m.) giving the 2d result twice the weight of 

 the 1st, - - - - - -f 1 28 34.07 



By comparison — Chronometer No. 141, was slow of 

 mean solar time for this station (at 8h. 30m. mean 

 time) - - . - . _ 4 40.14 



When the stars composing the 1st Set, of this night, were observed, 

 a very strong wind prevailed, which sometimes made it difficult to 

 hold the sextant perfectly steady. When the stars composing the 

 2d Set were observed, there was but little wind, and the sextant could 

 be held quite steady. For this reason we give the 2d result twice the 

 weight of the 1st. This, however, makes the result adopted only 

 07 (t^o) of a second of time greater than would be obtained by a 

 direct mean of the two results. 



