352 
PROFESSOR O. REYNOLDS AND MR. W. H. MOORBY 
in reading the counter or the scales, which would only be apparent from the reduction 
of the results after the trial was finished. Also, that in these experiments there 
would be no such rigorous check on the results as in surveying; so that, without 
danger of sorting the results, anomalous results, the cause of which was not noted 
during the trial, could only be rejected when the results themselves contained 
evidence of the cause of the anomaly, say an abnormal difference between the mean 
speeds by the counter and the speed gauge. 
It was therefore, from the first, decided to reject all trials in which there was 
definite evidence either during the trial or in the results, of uncertainty to which no 
definite limits could be assigned, in any one of the measurements, without regard 
for the apparent consistency of the results, and in the same way to retain all 
other trials. 
56. The following table contains a summary of all those circumstances on which 
the accuracy of the result of the investigation depends, together with references to 
the several Articles in which they have been discussed. In line with each circum¬ 
stance is placed the formula for the relative correction in the equivalent, necessary in 
consequence of the observed deviation from the conditions of equality between the 
heavy and light trials. In the same line with each circumstance are also given, 
to the millionth part, the limits of relative error as deduced in the corresponding 
Articles. 
