Force of the Earth's Magnetism* 



25 



Bahia, July 26, 1822. 

 Needle 3 

 Needle 4. 

 Needle 5 

 Needle 6 



Maranham, August 28 

 the town, Th. 80° : 



Needle 4 

 Needle 5 

 Needle 6 



In the suburb of Vittoiia, Th. 74° : 



370".8 



. 371".7 



373".0 



. 373".5 



Mean . 372".2 



, 1822. In a garden two miles distant from 



368".9 



. 363".6 



363".9 



Mean 



365".5 



Trinidad, September 28, 1822. In the Governor's garden at St. Ann's, 

 Th. 86° : 



Mean 



489". 5 



