INDEX. 



Abdominal plates, 391, 405, 411 



Accommodation, visual, 64, 104 



theories of, 105 



range of, 106 



changes of the crystalline 



lens in, 106 



action of the ciliary muscle in, 107 



mechanism of, 108 



changes of the iris in, 108 



in the lensless eye, 1 10 



auditory, 208 



Additional tones, 187 



Adolescence, 459 



Adult age, '459 



^Esthesiometer, 19 



Ages, 459 



Allantois, development of (see cho- 



rion),.. 368, 372 



villosities of, 363 



Amnion, formation of, 361 



villosities of, 363 



enlargement of, 370 



Amniotic fluid, 365 



origin of, 366 



property of, of preserving 



dead tissues, 366 



Ampullae of the semicircular ca- 

 nals, 214 



Angle alpha, 71 



Anosmia, - 32 



Anus, development of, 408 



imperforate, 408 



Aorta, abdominal, first appearance 



of, 391 



development of, 432 



Aortae, primitive, 390, 431 



Aortic arches, 431 



Aphasia, relations of facts observed 



in, to dextral preeminence,. . . 457 



PAGE 



Appendix vermiformis, develop- 

 ment of, 406 



Aqueduct of Sylvius, development 



of, 402 



Aqueous humor, 64 



Arachnoid, first appearance of,. . . 398 



Area pellucida of the ovum, 358 



Area vasculosa, 430 



Arterial system, development of,. 432 



Astigmatism, 93 



Audition, general mechanism of, . . 146 



summary of mechanism of, . . 229 



Auditory apparatus, divisions of,. 152 

 Auditory nerves, physiological anat- 

 omy of, 147 



general properties of, 148 



action of galvanism upon,. . . 149 



development of, 403 



Auditory vesicle, 402 



Azygos veins, development of, ... 434 



Bacillar membrane, 56 



Bartholinus, glands of, 336 



Beats, a cause of dissonance, 191 



Binocular fusion of colors, 126 



Binocular vision, 117 



Bladder, formation of, 373, 405 



Blastodermic cells, 357 



Blastodermic layers,... . 359, 387, 389 

 Blastodermic layer, vascular (so 



called), 430 



Blepharoptosis, 140 



Blind spot of the retina, 87, 90 



Blood-corpuscles, development of, 429 



structure of, in the foetus,. . . 429 



Blood-vessels, development of, ... 429 



Botal, foramen of, 436, 442 



Brain, comparative size of the right 



and the left side of, 457 



