438 



Messrs. F. Gotch and G. J. Burch. 



organ shock curve, No. 3012, and a shunt of two-lamps for comparison 

 with the other curve, No. 3013. The curves were then analysed by 

 the method described by one of us. 



Both curves gave the same ratio, namely, 15 cm. on the subnormal 

 = 88 scale-divisions on the radius vector. With the three-lamp shunt 

 120 scale-divisions = 9 volts. 



These data, applied to the analysis of the organ shock curves, gave 

 the results detailed in the annexed table. It will be noted that 

 No. 3013, though a much weaker shock, is similar in its time-relations 

 to No. 3012. 



Electromotive Force of Shock obtained from 15 mm. of Malapterurus 



electrkus Organ. 



Time after stimulus, iu 

 fractious of a secoud. 



Electromotive force, in 

 volts (No. 3012). 



Electromotive force, in 

 volts (Bo. 3013). 



-0150 



o-oo 



o-oo 



-0160 



0-44 



o-oo 



0-0170 



1-68 



o-oo 



'0175 



3-00 



o-oo 



-0180 



5-20 



0-59 



0-0185 



11-00 





-0190 



17-70 



4 '25 



0-0195 



19 -40 





-0200 



20-50 



8-60 



-0210 



22-70 



12-80 



-0220 



24-00 



14-90 



-0230 



25-00 



15-79 



-0240 



25-10 



16-15 



-0250 



24-90 



16 -60 



-0260 



23-80 



16-80 



-0270 



22 -70 





0-0280 



20-20 



16-25 



0-0290 



17 -70 





-0300 



14-20 



13-85 



-0310 



11-70 





-0320 



8*20 



11 '00 



-0330 



6-00 





-0340 



4-90 



7 '85 



0-0350 



3-60 





"0360 



2-60 



5-15 



0-0370 



1-75 





0-0380 



0-79 



3-59 



-0390 



0-30 





-0400 



0-00 



2-12 



-0440 



o-oo 





-0460 



0-66 



o-oo 



0-0480 



1-92 





In fig. 2 the results of one of the analyses (3012) given in the table 

 are plotted as a curve. This curve may be compared with that of 

 fig. 1, of which it is the interpretation. The ordinates represent the 



