a 
Chemistry and Physics. 223 
A, B, and C. The temperature of C is the mean of six sound- 
ings taken along near the equator :— 
A B C 
Mean of six 
Depth | Lat. 37° 54’ N. | Lat. 23° 10’ N. || temperature sound- 
in j|Long. 41° 44’ W. Long. 38° 42’ W.|| ings near equator. 
Fathoms. 
: Depth in Tempera- 
Temperature. Temperature. pert deters, ie. 
Surface 70°0 72-0 Surface.|  77°9 
1 63°5 67-0 10 77-2 
200 60°6 57°6 20 att 
60°0 62°5 30 16-9 
400 54°8 47°7 40 Ti4 
500 46°7 43°7 50 64 
600 41°6 41°7 60 60°4 
700 40°6 40°6 70 59-4 
800 38-1 39-4 80 58-0 
37-8 39-2 58°0 
1000 37-9 38°3 100 55-6 
1100 SUL 38-0 150 51°0 
1200 sr hl | 376 200 46°6 
1300 ato 36°7 300 42°2 
1400 Bil 36°9 40 40°3 
1500 386° 500 38°9 
2700 36:2 wus 600 39°2 
2720 sete 85-4 700 39°0 
800 ook 
00 38°2 
1000 36°9 
1100 37-6 
1200 36°7 
1300 35°8 
1400 36-4 
1500 36-1 
m. 34°7 
On computing the extent to which the three columns A, B, and 
C, are each expanded by heat according to Muncke’s table of the 
Inches above that column, In short, it is evident that there must 
4 gradual rise from the equator to latitude 38° N. of 34 feet. 
Any one can verify the accuracy of these results by making the 
necessary computations for himself.* 
I may observe that, had column C extended to the same depth 
* The tem i ction i hat less than 
© temperature of column C in Dr. Carpenter's section is somew: ‘ 
that given in the foregoing table; so that, according to section, the differ- 
estima Ve! between column C and columns A and B would be greater than my 
