Page:Proceedings of the Royal Society of London Vol 59.djvu/180

166 It will be observed that the ﬁnal results obtained from the two sets are freed from many of the unavoidable errors.

I give below the results of two sets of experiments each extending through eleven observations. The receiver was in an unusually good condition for nearly an hour, and during that time I took six observations with P to the front and six more with Q in the same position. As the receiver continued to remain in a fairly responsive condition I took five more for each set. As I have said already, greater weight should be given to the ﬁrst two sets of six readings, as being taken under the most favourable conditions.

In the ﬁrst two lines are given ten successive differences of the mean readings, taken with the cylinders P and Q.

The following are the readings in degrees for the ﬁrst six sets of observations with P or Q.