CONTENTS. 
Introduction 
Methods and authorities 
Topography and hydrography of the Finger Lakes district. . 
General account 
Lakes of the Seneca Basin 
Seneca and Cayuga Lakes 
Owasco Lake 
Keuka Lake 
Canandaigua Lake 
Skaneateles Lake 
Otisco Lake 
Lakes of the Genesee Basin 
Honeoye, Canadice, Hemlock, and Conesus Lakes 
Temperatures 
General observations 
Summer temperatures 
Surface and epilimnion 
Thermocline 
Hypolimnion 
Winter temperatures 
Mean summer temperatures 
Annual heat budget 
Wind-distributed heat 
Distribution of heat 
Distribution to thermal regions 
Distribution to the several lo-meter strata 
Heat supply of the smaller lakes 
Dissolved gases 
Methods of observation 
Overturning and circulation of the water 
Oxygen 
Circulation periods 
In the epilimnion 
In the hypolimnion 
In the thermocline 
Carbon dioxide 
Fixed carbon dioxide 
Half-bound carbon dioxide 
Free carbon dioxide 
Plankton 
Methods of observation 
Distribution of plankton organisms 
Phytoplankton 
Zooplankton 
Appendix. — Statistical tables 
Maps 
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