1st Result-Chronometer No. 2557, fast (at 12h. 35m.)

2d Set.

By 9 observations on ' Leonis, west

h. m. S.

+1 36 37.52

2d Result-Chronometer No. 2557, fast (at 13h.

3d Result-Chronometer No. 2557, fast (at 13h.

48m.)

+1 36 37.59

+1 36 37.52

Result adopted, or mean of the 3 sets-Chronometer No. 2557, fast of sidereal time for this station (at 13h. 14m.)

By comparison-Chronometer No. 141, was slow of mean solar time for this station (at 9h. 25m. mean time)

19th. 1859, May 21st. At the same Station. Sidereal chronometer No. 2557, fast:

1st Result-Chronometer No. 2557, fast (at 12h.

1 36 50.75

1 36 51.58

west (at 12h. 04m.)

By 8 observations on Herculis, east

(at 12h. 34m.)

2d Result-Chronometer No. 2557, fast (at 12h. 19m.)

Result adopted-Chronometer No. 2557, fast of sidereal time for this station (at 12h. 34m.)

By comparison-Chronometer No. 141, was slow of mean solar time for this station (at 8h. 27m. mean time)

+1 36 51.16

+1 36 51.24

4 41.08

h. m.

S.

+1 36 58.56

By 11 observations on Leonis, west (at 12h. 44m.) + 1 36 58.15

Result-Chronometer No. 2557, fast of sidereal time

for this station (at 12h. 40m.)

+1 36 58.35

By comparison-Chronometer No. 141, was slow of mean solar time for this station (at 8h. 39m. mean time)

21st. 1859, May 24th. At the same Station. Sidereal chronometer No. 2557, fast:

By 11 observations on a Corona Borealis, east (at 12h. 22m.)

By 11 observations on Leonis, west (at 12h. 38m.)

Result-Chronometer No. 2557, fast of sidereal time for this station (at 12h. 30m.)

By comparison-Chronometer No. 141, was slow of mean solar time (at 8h. 21m. mean time)

h. m.

S.

1 37 13.25

1 37 12.75

+1 37 13.00

22d. 1859, June 3d. At the same Station.

4 41.60

1 38 33.42

+1 38 33.42

Result adopted-Chronometer No. 2557, fast of sidereal time for this station (at 15h. 37m.)

By comparison-Chronometer No. 141, was slow of mean solar time for this station (at 10h. 48m. mean time)

23d. 1859, June 6th. At the same Station.

Sidereal chronometer No. 2557, fast:

1st Set.

By 9 observations on y' Leonis, west h. m. S.

4 44.22

Result adopted-Chronometer No. 2557, fast of sidereal time for this station (at 15h. 11m.)

By comparison-Chronometer No. 141, was slow of mean solar time for this station (at 10h. 11m. mean time)

24th. 1859, June 10th. At the same Station.

Sidereal chronometer No. 2557, fast:

4 44.80