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ELEMENTS OF GENERAL SCIENCE 



may bring about lower summer temperatures in its vicinity, 

 particularly on the eastern shore. We cannot be sure of a 

 general law by studying three cities only, but others have 

 studied the records for other places, and a similar state of 

 affairs is found to exist in all places in this region. 



If it is the winter temperatures to which we give our atten- 

 tion, we find that here again the west shore occupies an inter- 

 mediate position, the east shore is warmer, and the country 

 away from the lake is much colder. The same fact is brought 

 out by the study of the lowest temperatures reached during 

 a period of cold weather in the winter. In one of the tables 

 there is given the record of the lowest point reached by the 

 thermometer on each of several days during a severe cold 

 wave in the first part of January, 1913. The illustration 

 (fig. 77) represents similar conditions in 1912. It will be 

 noticed that the cold is less severe on the east shore than on 

 the west, and less severe on either shore than at places far 

 distant from the lake but in the same latitude. 



MINIMUM DAILY TEMPERATURE DURING A COLD WAVE IN 1913 



