IV CONTENTS. 



PAGES 



Observed and corrected elevations for the whole surface of Lake Erie 97-100 



Mean elevations of Lake Michigan-Huron 100-104 



Observed and corrected elevations for the whole surface of Lake Michigan- 

 Huron 101-103 



Explanations of plates 7 to 13 104-105 



Accuracy as tested by graphs 105-108 



Monthly and seasonal mean elevations 108 



Probable errors and weights 108-113 



Tides 113 



Seiches 114 



Seiches at Buffalo 114-116 



Seiches at Cleveland 116-119 



Seiches at Strait of Mackinac 1 19-120 



Examples of seiches 120-123 



Generalizations 123 



As to barometric effects 123-124 



As to wind effects 124-125 



As to seiches 125-128 



As to prevailing conditions on the Great Lakes 128-129 



Possible applications of results of this investigation 129 



Application to a study of laws of evaporation 129-130 



Application to regulation of the Great Lakes 130-131 



Application to determination of mean sea-level and to precise leveling 131-132 



Application to determination of tilting of the Great Lakes region 133 



