164 New Magnetic Electrical Machine. 
firmly in its position by a nut, but movable, so that the arma- 
tures may be removed at pleasure. d, is a strong brass pillar for 
supporting the axis, which turns on centres, secured and adjusted 
by nuts and milled head screws. There is a similar pillar at 
the other end of the axis, on the opposite side, but concealed 
from view by the body of the machine. The magnetic batte- 
ries are also secured to the frame by strong brass clamps, 
