SABINE’S EXPERIMENTS. 65 
Pendulum 4th. 
Corrections Var. in a m. solar 
Vibrations in 24 
day, ina vacuum of 
hours Temperat. 
Corr. to mean 
Temperat. 53 
. ) a5 1 
Date. : ai Baron. | vrton in 24] Temp. 
‘ : hayiees hours. / degrees. 53 degrees, Buoyancy | Elevation|the level of the Sea, 
1823. Inches ° s i pas Temp. 53.° 
— 4, A. M. 29 . 30/86162 . 527/52 , 9 |—O , 043/86162 . 484] , ‘ 
si se M.129 . 35'86162 . 632/52 , 9 | —O , 043/86162 . 589) 
5, A. MJ29 . 45 86162 91 |51, 8 |—O , 516|86162 . 394 
» P. M.|29 . 5086162 . 68 [52 , 35|—0 528. 86162 . 40 
»A. M.129 . 75 86162 . 81 [52 =0% , 43 |86162 . 38 Ss 027 |0, 345 36168 , ha 
23, A. M./29 . 6586161 . 48 |54, 75|+0, oe 86162 . 23 
» P. M29 . 6586161 .. 42 |54 , 95|+0 , 838/86162 . 258 
April 5,P. M./29 . 0786162 .3 |53,2 |+0 , 086/86162 . 386 
_ 6, P.. M29. 25|86160 . 825/57 41,72 (86162 . 545 
The room heated by a Charcoal fire. 
March 11,P. MJ29 . 70\85152 , 528|75 , 37/+9 , 619/86162 , 201 
* 13, A. M130 . 20/86151 , » 047179 , 94 411, 584|86162 , , 6315 , 832 10°, 345 | 86168 , 726 
13, P. M.j30 . 18 86150, , 905|80 , 7 |+11,91 86162 , 815 ee 
|29 . 59) 59 , 83| [86162 , 444|5 , 971|0 7345 | 86168 ,76 
o Results of the preceding operations. 
It now remains sto recapitulate the results of the operations that have been 
detailed, and to state the deduction therefrom : 
_ It has been seen that the invariable pendulum No. 3 would make 86117..164 
vibrations, and No. 4: 86126, 732 vibrations in a mean solar day, at New- 
York, in a vacuum, and at the level of the sea, the temperature being 53 de- 
grees of Fahrenheit ; and that the same pendulums would make respectively 
86159. Ol, and 86, 166, 76 vibrations under the same circumstances and tem- 
perature in London; being an acceleration between New-York and London 
of 41. 937. vibrations in 24 hours ; ; from which determination, the seperate 
results by each pendulum differ less than one tenth of a vibration; being 
within the limit assigned in page 12, to the difference which it was therein 
contemplated might be occasioned (but without prejudice to the mean result) 
in the apportionment of the rate of the clock at New-York to the division of 
the interval, for the whole period of which the rate corresponded, though it 
possibly might not with the same precision to the half intervals; taking, there- 
fore, the mean of the two pendulums as a representation of the number of 
