SABINE’S EXPERIMENTS. 39 
cally with the clock. Being desirous, however, of the fullest corroboration 
of accuracy, in the comparison of the clock with astronomical time, and the 
steeple of the Presbyterian Church in Murray-street being conveniently 
situated for the purpose, an eighteen inch astronomical telescope was firmly 
attached by a brass plate and screws to the side wall of the eastern window 
of the College Chaple, having a part of the steeple in its field of view, behind . 
which the times of disappearance of three stars in the great bear were observ- 
ed on the 24th of December, and on the 2d of January. The observations 
by both these methods, with a recapitulation of the several results, and the 
deduction of the daily rate of the chronometer from the 22d.of December to 
the third of January, are subjoined, and are followed by a table, showing 
the periodical comparisons of the clock with the chronometer, and the rate 
of the clock on mean solar time finally deduced. 
Observations to determine the rate of the Chronometer No. 423, 0n mean Solar time, between the 22d 
of December, 1822, and the 3d of January, 1823, by Zenith Distances of the Sun and Stars out 
of the Meridian with a Repeating Circle, observed in the Cupola of Columbia College, New- 
York. Lat. 40° 42’ 43” N. Long. 74° 03.’ 5” West. 
December 22d, P. M. Sun’s U. L. Bar. 30, 34. Th. 37. 
Chronometer. Level. Readings, &c. 
8.10. 17,2 | +2—5 | For the Zero. Final. 
11 .. 58. —2—8 | 97.18.10 206.18... 20 
14. 07,6 | +2—5 10 10 
15. 42, 4 | +9--3 30 30 
17. 43,2 | +5—2 10 20 
Reeeenl® - O8:.2 tebe 0 Wey. 1.15 206°, 18, 20 
Chr. 8.14.49, 4'+23—17/262 41. 45. 262.41 . 45 
Beit 1 ae 552g ee peg 
5 .01 .02,07 423 fast m. time. 469 .00 . 08 
78 .10. O1 obs. Z. D. 
+4. 32,5 Ref.—Par. 
+16 . 17,5 Semid. 
738. 30. 51. True Z. D; 
