52 SABINE’S EXPERIMEMTS. 
Pendulum 4. 
Corr. to 
Temperat. 
53 deg. 
ibrations in 24 
hours at Temperat. 
53 degrees. 
Var. in a m. solar 
Corrections. . 
day, ina vacuum at 
1823. 
December) In. | s 
27, A.M./30. 42'86128 -57 132-5 |i8. 815)86119. 755 
,, P.M.|30 . 42/86128 . 635132. 6 |I8. 772186119 . 863 
28, A.M./30.29/86128.6 |32.8 |/8. 68686119 .914 
» P.M./30. 29/86128.53 |33 8.6. |86119.93 
29, A.M./30- 29/86128.6 |32. 85/8. 66486119. 936 
» P.M.|30.29/86127.65 |35.75)|7. 417/86120 - 233 
30, A.M.|30. 46/86128.19 |34. 25/8 . 062/86120. 128 
», P.M.|30. 56)86127.37 |35 - 95/7. 331|86120 . 039 
31, P.M./30. 79/86128.055|33.6 |8. 344/86119. 71] 
1923, January 1, 
Noon,/30. 51|86129-14 |31.2 |19. 374\86119 . 766 
2, A.M.|29. 98/86128.12 134.5 |/7. 95586120. 165 
» P.M./30. 02/86127.38 |36.75)|6. 987|/86120 . 393 
Means. |30. 36/86128. 237/33. [8 . 25186119 . 9861|6,47 |0,276]/86126 . 732 
Barom. Vibrations in 2 | Mean | 
hours. T 
emp. , 
Buoyancy | Elevation 1] 
e Temp. 53°. 
Latitude of Columbia College. 
A knowledge of the Latitude is not necessary in the deduction of the length 
of the pendulum ; but as it is an important datum in connexion with it, for 
several purposes, it may be desirable to annex the following observations 
made in the Cupola of Columbia College towards its determination by Me- 
ridian Zenith Distances of the Sun and Stars, obtained with the Repeating 
Circle already mentioned. 
The mean result does not differ, it is understood, more than 1 or 2 seconds 
from that of unpublished observations of Professor Adrain. 
the level of the sea. 
