AT VAN RENSSELAER HARBOR. 



51 



June 8, 1854. 



Experiments of vibrations. (Left to right.) 



No. 



Time by chronometer 2721. 



No. 



Time by chronometer 2721. 



Time of 40 doable vibrations. 



1 



2 

 3 

 4 

 5 

 6 

 1 

 8 

 9 



10 

 11 



8 h 48" 

 49 



50 



51 



52".0 

 07.3 

 23.0 

 38.2 

 53.4 

 08.9 

 24.3 

 39.6 

 54.7 

 10.1 

 25.3 



41 

 42 

 43 

 44 

 45 

 46 

 47 

 48 

 49 

 50 

 51 



8 h 59" 



9 00 



04 s . 6 

 19.7 

 35.3 

 50.5 

 05.8 

 21.1 

 36.3 

 51.6 

 07.0 

 22.2 

 37.5 



10" 



12 s . 6 



12.4 



12.3 



12.3 



12.4 



12.2 



12.0 



12.0 



12.3 



12.1 



12.2 



10 12.25 



Arcs 6 5G'. 

 and 3 20 



Temp. 35. 



Time of 2 vibrations 15 s . 306. 



June 8, 1854. 



Experiments of vibrations. (Right to left.) 



No. 



Time by chronometer 2721. 



No. 



Time by chronometer 2721. 



Time of 40 double vibrations. 



1 



2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



10 

 11 



8 h 48 

 49 



50 



51 



59 8 .8 

 15.1 

 30.3 

 45.8 

 01.1 

 16.3 

 31.8 

 47.2 

 02.2 

 17.8 

 33.0 



41 



42 

 43 

 44 

 45 

 46 

 47 

 48 

 49 

 50 

 51 



8 h 59" 



9 00 



01 



12 s . 

 27.5 

 42.8 

 58.0 

 13.4 

 28.6 

 43.9 

 59.3 

 14.6 

 29.9 

 45.3 



10 m 12 8 .2 

 12.4 

 12.5 

 12.2 

 12.3 

 12.3 

 12.1 

 12.1 

 12.4 

 12.1 

 12.3 



10 12.26 



Arcs and temp, as before. Time of 2 vibrations 15 s . 306. 



Daily rate of chronometer 2721, losing 1 8 .0. 



RECAPITULATION OF RESULTS, JUNE 8, 1854. 



Set No. 1. Time of 2 vibrations 



Set No. 2. " " 



Set No. 3. , " " 



Set No. 4. " " 



Means 



Time of 1 vibration 



15 s . 511 

 15.509 

 15.503 

 15.498 

 15.369 

 15.395 

 15.306 

 15.306 



15.425 

 7.712 



Temp. 35 



" 35 



" 35.2 



" 35.2 



" 35 



" 35 



" 35 



" 35 



35.0 



The following deflections correspond in time to the middle of the above vibration results. 



