OF THE VIBRATIONS OF AN INVARIABLE PENDULUM. 



233 



In free air ; commencing series . . . 86305.82 ; Barom, 29.685 ; Therm. 43°.95 

 concluding- series 86305.12 ; Barom. 29.763 ; Therm. 42 .8 



Mean . . . 86305.47 ; Barom. 29.724 ; Therm. 43 .37 

 Within the glasses 86305.81 ; Barom. 20.719 ; Therm. 44 .7 



Whence an excess of 0.34 vibr. per diem within the glasses. 

 Exp. X. — Febr. 21st. Clock gaining 4™ 14^38. Observer Mr. Taylor. 



Thermometers. 



Standard 

 Barom. 



Disapp. Re.app. 



Arc registered and 

 true Arc, 



Mean 

 Interval. 



Correc- 

 tion for 

 Arc. 



Reduct. 



to 36°. 



Corrected 



Vibrations 



at36^ 



s s 

 " s- 



b. O 



1 



2 



3 



23 



24 



25 



inch. 



43.9 



44.6 



44.0 

 44.4' 



29.06 



iaos 



8 14 

 16 24 

 24 35 



8 29 

 16 42 

 24 56 



8 21 

 16 31 



24 42 

 8 44 



16 58 



25 13 



' h m s 



22 16 27.83 



1 16 50.33 



Div. o 



0.965=1.16 



0.33 =0.40 



i.491.93 



+ 0.91 



+3.47 



86306.46 



44.25 



29.045; Capill. + 0.019; Reduction to 32° — 0.038; = 29.026 



80306.46 





1 



2 



3 



23 



24 



25 



46.6 



45.3 



45.95 



46.4 



inch. 



29.02 

 "29.do 



58 24 

 6 33 



14 42 



58 15 

 6 27 



14 38 



58 33 

 6 42 



14 50 

 58 36 



6 47 



15 00 



h m 8 



2 6 37.33 



5 6 37.17 



Div. o 



0.92 = 1.10 



0.295 = 0.35 



>490.90 



+ 0.79 



+ 4.18 



29.01; Capill. + 0.019; Reduction to 32° — 0.043; = 28.986. 



86306.31 



86306.31 



E c 

 "> 5- 



fc. o 



".-9 



1 



2 



3 



23 



24 



25 



46.3 



45.1 



45.6 



46.5 

 45.2 



inch. 



29.00 

 "28.98 



50 16 

 58 26 



6 35 

 50 13 

 58 25 



6 37 



50 27 

 58 36 



6 46 

 50 33 



58 47 



7 00 



} 



m s 



5 58 31.00 



8 58 35.83 



Div. o 



0.96 = 1.15 



0.31 = 1.37 



i>491.13 



+0.87 



+4.08 



28.99; Capill. + 0.019; Reduction to 32° - 0.042; = 28.967. 



86306.47 



86306.47 



MDCCCXXIX. 



2 H 



