% 
the intensity of magnetic forces , &c. 65 
It was my intention to commence a series of such observa- 
tions at the beginning of the present year, and to continue 
them for as long a period as I was able ; but circumstances 
prevented my commencing at the time I proposed, and ill 
health has since put it out of my power to engage in such 
continued observations as would be required : but I trust the 
task will be undertaken by others who feel interested in 
investigating the phoenomena connected with terrestrial 
magnetism. 
MDCCCXXV. 
K 
