various British standards of linear measure . 
Si 
First comparison. 
The four thermometers being at 54,°, the following readings 
were taken. 
Readings. 
Forty inch bar. 
£ f"ist interval 
^ 2d. 
W J 
a , 3 d- 
g < 4 <h. 
S 5 th. 
< [6th. 
Mean 
Forty inch bar 
33 >5 
Div. 
Mean of Ramsden's bar 36,5 
■ of the forty inch bar 34,2 
Forty inch bar longer 2,3 
54 ’° 
33 .0 
27.0 
38.0 
3°>° 
37 ,° 
3 6 >5 
35 ,o 
Second comparison . Thermometers as before. 
Readings. 
Forty inch bar. 
& Ti.st interval 
2d. 
* J 3 d - 
Q < . 4 th - 
S 5th. 
M l 6th - 
Mean 
Forty inch bar 
36,° 
Div. 
Mean of Ramsden’s bar 37,8 
of forty inch bar 35,5 
Forty inch bar longer 2,3 
54-5 
3 *>° 
26,0 
4 °>° 
35,5 
4 °,° 
37 » 8 
35 ,o 
MDcccxxr. M 
