84 
Captain Kater on the comparison of 
Sixth comparison. Thermometers 56°. 
Readings. 
1st. interval 
107,0 
2d. 
80,0 
3d. 
79 ° 
4th. 
82,0 
5 th. 
75 ,o 
6th. 
83.5 
Mean 
84,4 
On examining the preceding comparisons, it may be per- 
ceived that the readings of the ' ix^h interval differ very little 
from those of the mean of the whjle bar. 
Readings of the sixth 
interval. 
Mean readings of all 
the intervals. 
Value of the sixth 
interval -f or — . 
37 ,o 
36,5 
— 0,5 
40,0 
37 > 8 
— 2,2 
40,0 
39 6 
— 0,4 
83 0 
83,0 
— 0,0 
87,0 
86,1 
— 0,9 
835 
84,4 
+ 0,9 
Mean 
— 0,5 
The sixth interval, therefore, is too short 0,5 of a division. 
This interval was now compared with the forty inch bar, 
the thermometers being at 57 0 ; the microscopes were trans- 
ferred from one bar to the other alternately. 
