LIST OF ILLUSTRATIONS. xix 



'FIG. PAGE 



226. Bernstein's differential rheotome . . . . . ' . 414 



227. Progress of the wave of -excitation, according to Bernstein . . 416 



228. Curves of electrical response to instantaneous stimulation (Matthias) . 417 



229. Diagram representing the excitatory variation of muscle . . 417 



230. Burch's projecting electrometer . . . . . .418 



231. Comparison curve for estimating the value of the curves of the capillary 



-electrometer . . .. . . . .419 



232. Diphasic, and monophasic curves of the sartorius . . .''. -420 



233. To illustrate the point of equipotentiality in the curve of the capillary 



electrometer . . . . . . . . 420 



234. To illustrate the excitatory variation of muscle .... 421 



235. Electrical response to a series of stimulations (du Bois-Keyniond) . 422 



236. Method of leading-off from injured muscle . . . . 423 



237. Tetanus curve of injured sartorius . . . . . 424 



238. Kesponses to ten excitations of -an uninjured gastrocnemius . . 424 



239. Response to indirect excitation of a cooled muscle . . . 425 



240. Veratrine curve (sartorius) . . . .<.-. 425 



241. Strychnine curve of an uninjured gastrocnemius . ... . 426 



242. Method of showing polarisation of muscle . . . . 427 



243. Effects on excitability of the passage of a constant current through 



muscle . . . . . . . . 430 



244. Hering's double myograph . . . . . . 432 



245. Contractions of sartorius recorded by the double myograph (Biecler- 



mann) . ... . . . . . . 433 



246. Contractions of the two ends of the sartorius, as recorded by the double 



myograph (Biedermann) . . . . . . - . 433 



247. Diagram of Frank's apparatus for recording isometric curve of frog's 



ventricle ... . . . . . . . 440 



248. Isometric and isotonic curves of the ventricle of the heart of the frog 



(Frank) . . . . . . . . .442 



249. Excitatory variations of cardiac muscle (Eiiithoven) . . . 446 



250. Einthoven's electro-cardiogram of man . . . . . 448 



251. Experiments showing transmission in both directions . . 456 



252. Time relations of induced currents . . . . . 460 



253. Diagram of rheonome ....... 471 



254-256. Influence of temperature on nerve excitability . . 485, 486, 487 



257. - ,j neutral salts . . . 489 



258. vapours 



259. Curves showing polar changes in excitability of nerve . . . 495 

 560. Influence of increased length of nerve on polar changes . . . 495 

 261. Tripolar arrangement of electrodes ..... 501 



262, 263. Influence of poles on rate of transmission .... 502 



264. Method of multipolar contacts .... .506 



265. Influence of demarcation current on polar excitation . . . . 508 



266. salt on polar excitability . . . . ,511 

 267, 268. Polar excitation of nerves of crayfish . . . 513,514 



269. "Currents of rest " of nerve ...... 518 



270. Facsimile curves of the photographed excursions of a capillary electro- 



meter connected with the frog's sciatic nerve (Gotch and Burch) . 530 



271. Biphasic response of frog's sciatic nerve (Hermann) . . 532 



272. Influence of intensity of stimulus on electrical response of nerve 



(Waller) . . 533 



273. Effect of ether upon the electrical response of nerve (Waller) . . 534 



274. carbon dioxide on the negative variation (Waller) . 535 



