THE CLIMATE OF MICHIGAN. 



687 



Each pair of stations was selected to show the true effect of elevation 

 alone, other influences such as latitude, distance from lake, etc., being 

 about the same for both stations in each pair. 



The effect of the lakes on the mean annual temperature is evident, 

 yet not as prounounced as it is in the case of either summer or winter 

 temperatures. Chart II shows that the temperature is lower in the 

 interior of the state than it is along the lake shores, but this is probably 

 due more to the influence of elevation than lake effect. The cooling 

 effect of the lakes in summer nearly balances the warming influence in 

 winter, leaving the results for the year about the same as in the interior, 

 at the same altitude. 



40« 



CHART II. -Mean ten^jerature for the year in 

 degrees Fahrenheit. (Average for ten or more years. 



