This page has been validated.

March 1902. Any one of these three methods is capable of furnishing results of the order of accuracy of one part in one hundred thousand; and differential measurements (e.g., with the light of the

Δ Weight
1…
2…
3…
4…
5…
6…
7…
3.8
3.1
3.2
4.3
3.8
3.93
3.83
1
1
1
2
2
3
4
3.81 = weighted mean
3.76 = calculated displacement

two limbs of the sun) can be obtained with a still higher degree of precision; and thus the effect of a moving source on the velocity of light could be determined.

Ryerson Physical Laboratory
University of Chicago