IN THE UNITED STATES AND BRITISH NORTH AMERICA. 261 



MICHIGAN.— Continued. 



1S45 



1855 

 1856 

 i8s7 



1S70 



46.95 



49.58- 

 45.62 

 43-58 

 44.71 

 47-73 



49' 



45-59* 

 47-15 

 46.56 

 46.70 

 50.01 



46.90 



46.37 



46. 

 47 

 45 

 46.25 



45-23" 

 45-34 

 47.52* 



46-55 



47-82' 



44-75 



43-63 



45 09 

 47-19 

 52.05* 



49.58' 



48.76 

 47- 7S* 



48-31 



44.21 

 48.61 

 51.62^ 



48.1.6 



' Hours of observation unknown^ 



