286 An Account of the Comparison of 
Fourth Comparison. Thermometers 52°. 
| Readings. 
Ist interval 99-0 
2d 78:0 
3d 73:0 
Ath 83-0 
5th 82:0 
6th 83:0 
Mean | 83:0 
15th April, Fifth Comparison. Thermometers 56°. 
| Readings. 
Sixth Comparison. Thermometers 56°. 
| Readings. 
Ist interval 107:0° 
80:0 
3d 79:0 
4th 82-0 
5th 75:0 
6th 83°5 
Mean 84:4 
On examining the preceding comparisons, it may be perceived 
that the readings of the sixth interval differ very little from those 
of the mean of the whole bar. 
Readings 
