. Carnegie Institution of Washington publication. 108 DISPLACEMENT INTERFEROMETRY APPLIED TO double amplitudes from triplets. This has been done, and the value of Ay is inscribed in each of the consecutive zigzags of reasonable shape. The mean values are Series i t=im Ay = io3 ,m 8-73 4-6 The apparent value of 7 in each case is but little more than two-thirds of the standard value and the deficiency must be ascribed to the coefficient of friction neglected. It is interesting, however, to note that relatively equation (i) is roughly corroborated, the displacement A% being (here) 4 t
. Carnegie Institution of Washington publication. 108 DISPLACEMENT INTERFEROMETRY APPLIED TO double amplitudes from triplets. This has been done, and the value of Ay is inscribed in each of the consecutive zigzags of reasonable shape. The mean values are Series i t=im Ay = io3 ,m 8-73 4-6 The apparent value of 7 in each case is but little more than two-thirds of the standard value and the deficiency must be ascribed to the coefficient of friction neglected. It is interesting, however, to note that relatively equation (i) is roughly corroborated, the displacement A% being (here) 4 times as large in two minutes as in one minute, though the motion itself is far from uniformly accelerated. In figure 122 the needle moves, as it were, without inertia and the phase difference (Ap) relative to the forces is therefore 90°, but the period is too short for much discrimination, particularly in view of the drift. In figure 123, however, the same anomalous condition reappears and, what is more striking, is the retarded motion between the turning-points. For this is of the nature of a lag, or indicates an apparently waning gravitational effect, or rather the growth of some repulsive force. 8 2 £L _5 i (Vf 1 W\, • • 0w, y0. $0 40 On July 7, I made another series of observations given in figures 12 4 to 127 for one, two, and three minute periods. Figures 124 and 126 made before and after figure 125 and for one-minute periods show no gravitational effect, but a mere drift with several induplications. At least, if triplets were constructed, they would have a value not exceeding A# = centimeter about one- twelfth the value in figure 122. During the first minute gravity shows no appreciable preponderance. During the ensuing one and two minutes, *. e., for. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the orig
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