Miscellanies. ‘405 
‘The ‘obsérvations began at the mouth of Genesee River, and 
were continued to Cobite, on the Canada side. The distance to 
Coburg is about sixty miles, and the place lies a little W. of N. 
from this city. The' first observation was made just in the mouth 
of the Genesee ; the second observation, about half a mile from the 
mouth of the Ganawie; where its waters are well mingled with those 
of the lakes ; the nine succeeding were made about every six or 
seven miles, the last being at the landing at Coburg. They were 
made upon water drawn from about one foot below the surface. It 
was found however by repeated trials, that the temperature for 
three feet deep was not sensibly different from that at the surface. 
At the bottom of the table is given the course of the wind on the 
day of observation and the mean temperature of that day at Roch- 
ester, and also the mean temperature of the two preceding days. 
The gradual diminution of temperature from the shore towards 
the middle of the lake, from spring to September, is an interesting 
fact. Mr. McAnslan,* who is an engineer of considerable knowl- 
edge of chemistry and mechanics, remarks too, that the direction and 
strength of wind carries the colder portion nearer the shore in the 
direction of the wind. In August and September, the temperature 
of the water was nearly uniform from shore to shore. In October 
and November, the water in the middle of the lake was warmer 
than nearer to the shores. In spring and down to July, the air on 
the lake is peculiarly cool from the coolness of the water. In Oc- 
- tober the temperature of the atmosphere and lake was nearly the 
same, while the difference was considerable in the preceding month. 
Finally, it is probable that the current of Niagara River is pretty 
direct through the lake, and that the accumulation of ice on Lake 
Erie and its being heaped up and continued on the eastern part of 
the lake, often till into May, must be in part the cause of the low 
temperature of the water of Lake Ontario, as shown in the table for 
the months of May and June. * C.D. 
10. Encrinite, Tufa, &c.—For the benefit of the numerous read- 
ers of your Journal, who may or may not be interested in the col- 
lection and examination of the organic remains of this country, I beg 
* Some alteration in the position of the floatboards of the wheels of the dene 
has been made by Mr. McAnslan, by which they seem to move with more effi- 
water. 
Vor. XXXIII.—No. 2 52 
‘ 
