CAPTAIN rater's CONVERTIBLE PENDULUM. 



333 



which was the present object of inquiry, did not require that the convertibility 

 should be very rigorously established, the following experiments were made to 

 determine the comparative rate, in air of ordinary density, and in highly rarefied 

 air ; first with the great weight below ; and second, with the great weight 

 uppermost. 



Great weight below. April 21, 1829. Clock by Dent making 86466.00 Vibrations. 



ObM^rvers, 



Captain 

 Sabine." 



Captain 1 



Sabine."S 





1 

 2 

 3 

 17 

 18 

 19 

 20 

 21 



standard 

 Therm. 



50.0 



29.630 



49.1 



49.55 



Barom. 



or 

 Gauge. 



29.630 



Times of 



Disapp. Re-app, 



34 20 

 41 31 

 48 42 

 29 35 

 36 46 

 43 58 

 51 11 

 58 23 



34 33 

 41 45 

 48 58 

 30 12 

 37 25 

 44 38 

 51 52 

 59 06 



1 h m « 

 ^ 2 41 38.17 



4 44 18.6 



Arc registered 

 and true Arc. 



Div. o 

 0.68 = 0.82^ 



0.15 = 0.18 



Mean 

 Interval. 



>432.97 



Correc- 

 tion for 

 Arc. 



+ 0.36 



Reduc- 

 tion to 

 49°. 



+0.24 



29.630; Capill. + 0.019; Reduction to 32° —0.053; = 29.596. 



Corrected 



Vibrations 

 at 49°. 



86067.18 



86067.18 



April 22. Clock making 86466.00 Vibrations. 



Mr. 



Taylor. 



Mr. 

 Taylob. 



[.OR. I 



'■ ( 



LOB. I 



1 



2 



3 



13 



14 



]5 



47.7 



47.7 



1.05 



1.05 



19 49 

 27 18 

 34 47 

 49 39 

 57 10 

 04 39 



19 59 



27 28 

 34 57 

 49 53 

 57 24 

 04 53 



h m s 



27 23 



1 57 16.33 



Div. o 



0.92 = 1.10 



0.73 = 0.88 



^449.44 



+ 1.60 



-0.24 



47.7; + Index correction for a rarefied medium 0.75; = 48.45. Gauge 1.05. 



86082.60 



36082.60 



Mr. f 

 Taylor.] 



Captain J 

 Sabine. J 



1 



2 



3 



11 



12 



13 



49.0 



48.2 



29.350 



29.350 



27 19 

 34 33 

 41 46 

 39 34 

 46 49 

 54 07 



27 32 

 34 46 

 42 00 

 39 58 

 47 15 

 54 30 



h m 8 



2 34 39.33 



3 47 02.17 



Div. o 



0.79 = 0.95 



0.30 = 0.36 



143*4.28 



+ 0.65 



-0.17 



86068.26 



48.6 



29.350; Capill. + 0.019; Reduction to 32° — 0.052; = 29.317. 



86068.26 



