MECHANICAL CONNEXION BETWEEN ETHER AND MATTER. 
153 
earth inductor in the same circuit thrown over two right angles). There was a 
certain amount of permanent magnetism, and the result is indicated in the following 
table and plotted in a curve (fig. 2). The field intensity was not very different at 
different depths in the channel; it varied from 1730 cgs. near the rim to 1830 near 
the winding, when 110 volts were applied. 
Intensity of field in the channel of the oblate spheroid (with decreasing current), 
at a depth of 4’6 inches from the outside. 
Exciting current in amperes . . O’O 0 31 0*67 1*32 1*92 2*52 3*18 3*80 
Field in cgs. lines per sq. centim. 92 255 490 980 1310 1530 1670 1800 
The maximum current was commonly used for purposes of excitation; and some¬ 
times for a short time this current was doubled, by the application of 220 volts. 
By the 8th June, 189*2, this iron mass, weighing 14 cwt., had been mounted on the 
vertical shaft of the whirling machine, in place of the steel disks, and a spin was 
taken, with the optical frame in good action, and one half of the beam of light going 
three times round in the channel of the iron. 
The shaft, however, was I'ather too weak to carry the weight, and exhibited a 
tendency to bend, which prevented the attainment of high speed. Moreover, the 
step bearing on which the shaft rested (as described in the previous paper, the shaft 
was supported on a hard steel pivot resting on another steel surface inside an oil 
MDCCCXCVII.—A. X 
