-■>'< Il \ \i; \ipK \ 



losfs its locip clini'iictor. \'ii\v ii" wo woro tn romjinv Im«/. 'J] willi 

 Figs 17. 1:^, and 8, 2, mid take im accoiini ol' the iiitoniiediate links 

 of development, we sliould at once regard them as being of essentially 

 o]i])osite ehnraeter. In the four earlier e;ises, positive twist increased 

 ilie magnctiznticMi. and negative twist diminished it : hut in the jire- 

 sent i-asc. the «tt'cri- arc exiictly o])p<isilc. In (he same wav. Fig. 

 I'O present featm^'s (piile o))posito t(^ those presented liv l''igs. 1, 7. 

 11, and l(i. However, just as in tlie former sels of experiments, the 

 twist at whii'li <l^/<lr \anishe^ w;is shown to shifr gradiialh' to the 

 nesative side as the load was increased; so in tiie |)resent case, tiie 

 nvist at whicli d^\/ilr \anishes shifts gradiiallv to the rigiit as the load 

 is increased. These very interesting rcAersals of etlects c|earl\- depend 

 oil ihe strength of the field. Tiieii again the particular >trengtli of 

 Held at which tlie reversal of these etfects hegins to show its(>lf seems 

 to he connected with the fid already discussed tli:if ïm- a ]iarticular 

 tield the ratio +,?s''( — ^si hecomes infinite. In other words, when the 

 strength of the field is s':ch that under sufiicient loading the reversal 

 of polaritv \;iiiishes away, this seems to lie the signal fir the nvw set 

 ipf condition^ to ajipear. I p to this i-ritical strength of field, it i< the 

 lefl hand loop in the tvpical s\-miiietrical curve that gradiialK ilimini- 

 -^hes under loadiim. I'mt for strengths of fields higher than I his 

 • ■ritical \aliu\ it i^ ihe l'iiihi hand loop that disappears when the load 

 is li'reat enough. This reversal of effects also seems to he accom- 

 panicil hv a lingering of iIk' magnetizntion near Ihe zero (see figures 

 18. and l!l.) 



Il i-; not neccssir\- lo discii-s in (letail (it her c-om'iination> of fiefl 

 and sire-^ wliich were e\ periiiienled upon. i'licre are certain minor 

 dillei'ences depending on strength of the field : hut tlu^ primipal features 

 for field< hiuher than 8 are the same. The essential characteristics can 



