M" 



( >MT \r \ i i\ i i I i < i i;< > i'ii\ M< >!.<><, V 



,-xleinal ,iiil.i<<- Allei .in inlci \eiiinv period of telanisat ion, 

 houevei, the i espouses a ic <n I" l>< i<\. -i KM I li;; '12). 

 I IK- IK .1 n-. MI<| I). i'- be n ,(!. h-d |., i the purpo- 

 show ill}; the ;;iadu.d |)|(.< <-,.<! li. IIP, ill. in horn the noiinal 



negative to the reversed positive response I h< -.pei mien 



taken \\ -iMinaih At the commencement ol the 



experiment the galvanometei -,|..,t \\-a-. <|me ,< cut, Imi when 



th<- s|.r iiiien was sul)jcctc<l to a sinvje stroni; thermal shock, 

 a |.ioloii|;cil sern's ol multiple responses was initiated, per- 

 lor more than an hour. Of this series I here re- 



piodiu e lour dil'leient 

 poi lion-, fig, i ; . The 

 liisl of tin eon- 



of pulses of 

 \ anoinelric nej'.ativity 

 of the internal suil.Kc 

 The ie< OVC1 ie . are here 

 in* oinplete, and the 

 base line -.hilts upwaid-.. 

 .ho\\-in;' t an in< reusing 



negativity <>i that sm 

 face. i he negative 



pulses are then rcvei sed 



!.=. .... n K ,.,J,U- u i ... x ..i '" l'-i"v. through an 



iii Sionuu-li .'I i;-i-lv. iii I <|in intei medi.ite di ph.e.ie 



.\ltrin.ilini; Sh,., K-.. .,-. 11 I.. IM i, \ ( i ., ,1 .ill, i . . , 



l.tMH.,,,,.,, (*) 1" tll( ' l "--' !''> 



ol this pionouneedly 

 positive response [t } the la-.e line is hoi i/oiilal. It then 



begins to shift downwards (^) thus exhibiting a decrea 

 negativity or increasing positivity of the int(inal surface 

 In thi-, peit-Mlu variati>n of the c-lectrical condition we have 

 l p.nallel to the records winch \\ e haxealuadv 



seen in Ntptntkc and in Drostra (figs. 203, 205, 2oS, and 



It lias already been pointed out that, in \ u \\ of the 



I iin* tional pis u han ties ,.| the ilii;estivi- oi;;an, it ini : .;hl U 

 pei-te.l that the alternate reactions of secretion and absorption 

 would neithei ol them he single ami spasmodic, but each long 



