( 810 ) 
Results of observations and calculations. 
Series of observations with the apparatus with unsilvered walls. 
The difference in height 2 was obtained from the observed ascent 
from z = z' {1 -f 0.0285). The observation * was very difficult and 
is little reliable. 
The deviation in the case of the observation in a field of 5182 
gauss is probably due to a mistake of 1 in the number of whole 
millimeters which were read off, but of this we are not certain. 
Deviations from proportionality with H* are considerable but by 
no means systematic. If we take the mean of all the measurements 
with the exception of the last in which special difficulties were 
encountered we reach the value 
~ = 1.209.10-*“, 
and for the specific susceptibility with g = 981.3 for Leiden 
*/90°.ik. = 237.3.10-6. 
I) The boiling point of oxygen according to H. Kamerlingh Onnes and G. Braak 
These Proc. Oct ’08. Comm. fr. th. Leyden labor. N°. 107a § 6. 
