Mr. Bowditch on the variation of the magnetic needle. 348 
The variation observed by Doctor Williams at Rutland, in Ver- 
mont, leads to the same result. His observations at that place were 
1789 April 17 P?sW 
1810 May 19 6 4 
181i Sept. 9 61 
Whence he concludes, that the magnetic variation at Rutland, for 22 
years past, has been decreasing at the annual rate of 2’ 495. 
