INDEX 



ABERRATION, chromatic, 432, 434 ; diaphragm, 434 ; spherical, 



by reflection, 426 ; spherical, by refraction, 427, 434. 

 Absolute force of muscle, 358. 



Accommodation. 469 ; angle between light and visual axis, 

 487 ; far point, 479 ; iris, 474 ; lens, 474, 475, 477 ; line, 472 ; 

 measurements, 479 ; mechanism, 473 ; pupil, 473 ; pupil, near- 

 ness, 488 ; pupil, size, 488 ; range, 471, 484. 



Acuteuess of vision, 465, 466. 



Action current, brain and cord, 319; decrement, 309; dura- 

 tion, 314; glands, 320; heart, 310, 312; threshold value, 

 318; human muscle, 309; muscle, 300; nerve, 315; optic 

 nerve, 318; positive after current, 317; positive variation, 

 316; precedes change in form, 311; tetanus, 305; voltage, 

 315. 



Afferent impulses, reflex action, 371 ; summation, 372. 



Alteration hypothesis of nerve and muscle current, 299. 



Amalgamation, 46 



Ametropia, determination of, 493. 



Angle, construction of tangent, 467 ; incidence, 403 ; reflection, 

 403; refraction, 411 ; sine, 414; visual, 464. 



Angle gamma, 464. 



Animal heat, 285. 



Ankle jerk, 376. 



Anodes and cathodes, physiological, 110. 



Anterior roots, vasomotor fibres, 572. 



Aortic regurgitation, 550. 



Aortic stenosis, 551. 



Aperture, 420, 427. 



Apparatus, criticism of, 84. 



Arrhenius, theory of dissociation, 81. 



Artificial scheme, 511. 



Astigmatism, 464 ; measurement, 495. 



Atropine, action on heart, 564. 



Augmentor centre, 566. 



Axis, optical, 419 ; optical, eye, 439 ; principal, 419 ; visual 463. 



