ILLUSTRATIONS 19 



FIG. PAGE 



257. Adjustment of the apparatus shown in Fig. 255 in the chest of 



a dog 290 



2.~>s. Method of making the first incision before trephining the skull . 292 



259. The trephine opening 292 



260. Method of quickly cutting across the brain stem 293 



261. Method of destroying the brain 293 



262. Plugging trephine opening with cotton after brain is destroyed . 294 

 263A. Tracing showing the action of pilocarpine and atropine . . . 295 

 2(i3B. Tracing showing the action of muscarine and atropine .... 295 



2<>4. Tracing showing the action of lodal 296 



2(i5. Tracing showing the action of arecoline 298 



I'liii. Tracing showing the action of arecoline and atropine .... 299 



2<i~. Tracing showing the action of nicotine 301 



26s. Tracing showing the action of nicotine 303 



L'I'I!!. Method of applying a plethsmograph to the hind leg of a dog . 304 



27d. Tracing showing the action of a fatal dose of nicotine .... 305 



271. Arrangement of apparatus for recording intraocular pressure . 308 



272. Tracing showing the action of nicotine 309 



273. Arrangement of apparatus for recording pulmonary blood-pressure 311 



274. Dissection showing the method of ligating the left pulmonary 



artery 312 



275. Second step in preparing to insert a cannula in the pulmonary 



artery 312 



270. Third step in preparing to insert a cannula in the pulmonary 



artery 313 



277. Method of inserting the special cannula into the artery .... 313 



27s. Special form of separable pointed cannula for pulmonary artery . 315 



279. Special (all-glass) form of cannula for the pulmonary artery . . 315 



2sn. Tracing showing the action of adrenaline 317 



281. Method of dissecting out the orbital fat and fascia to expose the 



optic nerve 319 



2si_>. Bone cutting forceps 320 



L's.'I. Tracing showing the action of lobeline, arecoline and atropine . 323 



2s4. Tracing showing the action of lobeline 324 



285. Tracing showing the action of lobeline 324 



286. Tracing showing the action of pilocarpine 325 



28~. Tracing showing the action of lobeline 326 



2ss. Tracing showing the action of lobeline 327 



289. Tracing showing the action of tetramethylammonium chloride . 329 



290. Tracing showing the action of tetramethylammonium chloride . 330 

 2SU. Tracing showing the action of pilocarpine, and tetramethylam- 

 monium chloride 331 



292. Arrangement of apparatus for recording contractions from a 

 uterine strip, or from an arterial ring, ureter ring, intestinal 



strip, ring of frog's stomach, etc 333 



_!.;. Tracing showing the action of muscarine 335 



294. Diagrammatic cross-section of the intestine (Color plate) . . . 336 



2 ( ..">. Tracing showing the action of nicotine, arecoline and atropine . 336 



296. Tracing showing the action of trimethylamine 340 



297. Tracing showing the action of pilocarpine and trimethylamine . 341 



