THE ZooLocist—May, 1876. 4913 
No. 5. a, 1; B, 4; result, 63° F. 
No. 6. a4, 1; B, 5; result, 62°5° F. 
No. 7. 4,1; B, 20; result, 60°7° F. 
WATER LINE 
So that, by increasing the quantity of water in B, that in A is made 
to approach very near to the temperature of B, whether the sur- 
rounding atmosphere tends to increase or decrease the temperature 
