62 SABINE’S EXPERIMENTS. 
municated can be considered as otherwise ean pueaiebe: the uncertainty 
which is thus mvolved is however too inconsiderable to have justified a delay ° 
in their communication ; it is more than probable that 0. 435 per diem will _ 
prove a nearer approximation to the truth than either 0. 43 or 0. 44; but the 
difference which the adoption of either of these numbers would produce in 
the acceleration between New-York and London, deduced from gprse ex- 
periments, made as they were in temperatures differing 19 degrees from each 
other, would be less than one tenth of a vibration in the 24 hours, and con- 
sequently less than ,;'1,,,th of an inch in the length of the pendulum at New- 
York ; when; however, the correct allowance shall have been ascertained by 
actual experiment, its amount shall be notified, and the influence on the final 
deduction of this paper computed, and duly communicated. 
a 
Vibrations of the detached Pendulums in Portail Place, London, Lat. 51° 31’ 08,4” N; , Elevation 
83,5 feet above the sea. 
Pendulum 3d. 
Corr. tomean| Vibrations in 24 
Temperat. 53] hours Temperat.| ——__ 
ee 53 degrees. 
Corrections. Pri: in a m. solar 
y, ina vacuum of 
al SEES I AN TE? col Woon SE OS POEECCE tog SPER RON 5 BE Cry IP enn Pe eee ar Elevation ey level of the sea. 
Date. Bakaits 
Vibrations in 24} Temp. 
hours. 
» P.M.\29.75 86152.2 |53,6 |+0, 26 |86152 . 46 
20, A. M.|29 . 60 86153 . 29. [51 , 05|—0 , 84 |86152 . 45 
» P.M.|29.60 86153 . 49 [51 —0, 86 186152 . 63 
21. 29 . 25 86152. 02 (54, 85/+0, 79 |86152 . 81 
22, A.M.|29 .1586152.16 54,5 |40, 64 |86152.8 
» P.Mj29.15 $6152.09 |54,8 |+0,77 |86152 . 86 
24, P. M.|30 . 20 86151 ...77 |54,75|40, 75 |86152 . 52 
____ 25, A.M,\30 . 20 86152. 24 [53,5 140,22 |86152.46 | TP 
29-64 53, 5 | | 86152. 6 | 6,066 | 0,344 | 86159, OL thas © 6 Sem OH 5 | IRE BRP PERSIE DBE To O1 
\ 823. Inches 2} ae ian ohne ve. hae ee oan Meee ae ole oi ee 93°. 
March 19, A.M.\29 . 75 86152 .2 (53, 6 +0, 26 |86152 . 46 
K 
