44 Proceedings of the Royal Society of Edinburgh. [Sess. 
further reduced. The former effect tends to disappear as the cyclic 
amplitudes are sufficiently increased, and, as in fig. III., the final “off” 
curve alone exceeds the normal induction at the cyclic extreme, the final 
“ on ” not being increased sufficiently to rise above the normal cyclic 
CYCLIC FIELDS. A 2 CONDITIONS-continued. 
ORDINATES. CHANGES OF B-ABSCISSAE. 1st TO 40th "ONS" AND "OFFS OF LOAD. 
amplitude as in figs. I. and II. at lower amplitudes (see “ Fields increasing 
from Zero,” p. 48). 
But there are points in the first and third quadrants, when the cyclic 
extremes are being departed from, where the irreversible effects vanish, 
and loading and unloading decrease and increase the induction by practi- 
