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DR. C. CHRBE, EXPERIMENTS ON ANEROID BAROMETERS 



58, 59 were taken on May 19, 21, 25, and 26, 1897. During either of these two 

 groups of experiments the condition of the aneroids may reasonably be regarded as 

 constant, except in so far as earlier experiments of a group may have affected the 

 later. The temperature was practically the same for all the four experiments of 

 either group ; so that the corresponding observations are peculiarly well fitted for 

 investigating the influence of the rate of reduction of pressure on the descending 

 readings. The general nature of the phenomena will be found, I think, sufficiently 

 illustrated by Tables XXIX. and XXX., which give the corrected errors at the lowest 

 point of the range. 



TABLE XXIX. Corrected Error at Lowest Point. 



TABLE XXX. Corrected Error at Lowest Point. 



In both tables the mean corrected error is more negative, or the aneroid reads 

 lower, when the rate of change of pressure is reduced. The difference between the 



