AT VAN RENSSELAER HARBOR. 



57 



June 24, 1854. Experiments of deflections. 



Deflecting magnet A. 67. Deflected magnet I. 7. Distance 0.9 feet. 



Magnet. 



North pole. 



Circle reads. 



Means. 



2 u. 



Temp. 



w. 



E. 



W. 

 E. 

 E. 

 W. 



264 10' 

 09 



369 42 

 41 



365 00 



364 59 



259 50 



49 



09'.5 

 41.5 

 59.5 

 49.5 



105 32'.0 



105 10.0 



Means 105 21.0 



38.0 

 38.0 

 38.0 

 38.0 



38.0 



Experiments of deflection. Distance 1.3 feet. 



Magnet. 



North pole. 



Circle reads. 



Means. 



2u. 



Temp. 



E. 



W. 



W. 

 E. 

 E. 

 W. 



298 37' 

 36 



329 21 

 21 



330 13 

 12 



299 42 

 41 



36'. 5 

 21.0 

 12.5 

 41.5 



30 44'.5 



30 31.0 



Means 30 37.7 



38.5 

 38.6 

 40.3 

 40.0 



39.4 



June 24, 1854. 



Experiments of vibrations. (Left to right.) 



No. 



Time by chronometer 264. 



No. 



Time by chronometer 264. 



Time of 40 double vibrations. 



1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



10 

 11 



4 h 21 m 34 s . 3 

 49.6 



22 05.2 

 20.7 

 36.3 

 51.8 



23 07.3 

 22.8 

 38.4 

 53.8 



24 09.1 



41 

 42 

 43 

 44 

 45 

 46 

 47 

 48 

 49 

 50 

 51 



4 h 31 ra 53 8 .3 

 32 08,8 

 24.2 

 39.6 

 55.0 

 10.4 

 26.3 

 41.8 

 57.2 

 12.5 

 28.0 



33 



34 



10 m 19 s . 

 19.2 

 19.0 

 18.9 

 18.7 

 18.6 

 19.0 

 19.0 

 18.8 

 18.7 

 18.9 



10 18.89 



Arcs 6 16'. 

 and 3 20 



Temp. 41.2. 



Time of 2 vibrations 15*. 4 7 2. 



The chronometer nearly shows Greenwich mean time, and its daily rate is less than 8 .5 



(gaining). 



