is ro ; 
) 0 5 
i 
i 
i 
i 
i 
I 
i 
1- 
Ca.yu$a| 
Owasco! 
Seneca j 
SKaneatjsles 
Green { 
. 
1 
1 
1 
1 
1 
i 
! 
Bolsenaj 
Orta. } 
Como } 
Geneva{ 
Thun [ 
Zu s | 
Zurich J 
Constance 
WSrth 1 
Mil 1st Jt 
Wlirm j 
Ammerj 
Bour^dj 
Annecy! 
Atter | 
T raun j 
Tegern 
Ness 
Morar 
Lochy 
Katrine 
Wettern 
! 
i 
! 
M jo sen 
1 
I 
| 
Ladoga 
1 
j 
Fig. 1. This diagram shou 
of the lake. Each division of til 
The place of the line on the dias 
get of a tropical lake is shown ; 
same line; that of a temperate ] 
The broken line extending 1 
ing winter. No winter observat 
eluding in the budgets of that b 
In general, where there ar< 
recorded, the mean is taken for 
