xlii COMPARATIVE ELECTRO-PHYSIOLOGY 



PAGE 



355. Experimental Arrangements for Showing so-called Polarisation- 



increment by the Joint Effect of Increased Excitability at Anode 

 and Enhanced Conduction of Excitation electrically Uphill. 

 Direction of Current in this is Reversed 574 



356. Photographic Record of Responses in Nerve of Fern, under Anodic 



and Kathodic Action as described in Figs. 354 and 355. . . 575 



357. Photographic Record of Similar Effects in Nerve of Frog . . . 575 



358. Make-kathode and Break-anode Effects in Biophytum . . . 579 



359. Effect of Anode and Kathode on Responsive Sensation in Human 



Hand 582 



360. Polar Effects of Currents due to Localised Application on Upper 



Half of Pulvinus of Erythrina indica 589 



361. Experimental Arrangement for Magnetometric Method of Record . 594 



362. Photographic Record of Uniform Magnetic Responses of Iron . . 594 



363. Photographic Record of Periodic Groupings in Magnetic Responses 594 



364. Photographic Record of Response and Recovery of Steel under 



Moderate and strong Magnetic Stimulus ..... 595 



365. Photographic Record showing Ineffective Stimulus made Effective by 



Repetition ........... 595 



366. Molecular Model 598 



367. Method of Resistivity Variation ........ 600 



368. Photographic Record of Response of Aluminium Powder in Sluggish 



Condition to Stimulus of Electric Radiation . . . .601 



369. Photographic Record Showing Uniform Response of Aluminium 



Powder to Uniform Stimulus of Electric Radiation . . . 602 



370. Photographic Record of Response of Tungsten .... 603 



371. Experimental Arrangement for obtaining Response in Iron by In- 



duction Current 604 



372. Magnetic Conductivity Balance ....... 607 



373. Process of Balancing illustrated by Photographic Record of Responses. 608 



374. Effect of K- and A-Tonus on Magnetic Conduction . . . . 609 



375. Opposite Effects of K-Tonus when moderate and strong . . . 610 



376. Effects of K- and A-Tonus on Magnetic Excitability . . . . 611 



377. Gradual Enhancement of Conductivity by the Action of Stimulus . 612 



378. Characteristic Curve of Iron under increasing Force of Magnetisation 620 



379. Characteristic Conductivity Curve of Sensitive Metallic Particles be- 



longing to Negative Class, under increasing Electro-motive Force . 621 



380. Cyclic Curves of Magnetisation and'of Conductivity . . . 622 



381. Photographic Record of Magnetic Tetanisation of Steel, exhibiting 



Transient Enhancement of Response on Cessation . . . 623 



382. Mechanical Response of Frog's Nerve to successive equal Stimuli, 



applied at Intervals of One Minute ...... 625 



383. Mechanical Response of Frog's Nerve, showing Conversion of Ab- 



normal Positive into Normal Negative Response after Tetanisation 627 



384. Photographic Record showing Conversion of Abnormal ' Down ' Re- 



sponse in Tin to Normal ' Up,' after Tetanisation . . . . 628 



