of a Chronometer. 



119 



was in the same situation ; and that the mean of the four inten- 

 sities approaches very nearly to an equality with that entered in 

 the former Table. 



The top and bottom of the Chronometer presenting so many 

 varieties of attraction, it was conceived that similar anomalies 

 might result from an examination of its sides. Accordingly, 

 when xn was uppermost, and the oscillating cylinder one inch 

 above the middle of the side, the intensity amounted to 105.61 ; 

 but when the time-keeper was turned, so as to bring ix .below 

 the cylinder, the measure of the attraction rapidly declined to 

 89.61 ; and when vi was examined, it increased to 91.78 ; and, 

 lastly, when in pointed upwards, it again declined to 84.05. 

 These results may be conveniently arranged in a Table. 



The preceding observations having been made on the exter- 

 nal parts of the Chronometer, the intensity of its internal works 

 was next determined ; and, first, by placing the centre of the os- 

 cillating cylinder one inch above the extremity of the steel ar- 

 bor of the fusee, which possessed magnetism in a very high de- 

 gree, when the intensity was found to be 109.09 ; but when the 

 measure of the attraction was ascertained, in the line of a com- 

 mon tangent, proceeding from between the barrel and fusee, xn 

 being uppermost, it declined to 107.82. A still greater declen- 

 sion was, however, remarked, when the Chronometer was turned 

 another quadrant, so as to bring the middle of the side of the 



