746 



INDEX. 



The Numbers refer to the Paragraphs. 



culi,226; composed of fibrillje, 226 ; en- 

 veloped in sheath, 227 ; form and com- 

 parative dimensions of, 228, 229 ; structure 

 of ultimate fibrillae, 230; state of, in con- 

 traction, 231, 233; origin of, 235, 236; 

 reparation of, 237; supply of blood-vessels 

 to, 239; supply of nerves to, 240; struc- 

 ture of, in Muscles of Organic life, 234; 

 development of, 235, 236; disintegration 

 of, from use, 239, 263, 586 

 Contractility of, 573, 574 ; irritability of, 575 ; 

 contraction alternating with relaxation, 

 576, 577; persistence of after death, 578 ; 

 depressed by sedatives, 579; by violent 

 nervous impressions, 580, 581; increased 

 by stimuli, 582; dependent on arterialized 

 blood, 583 585; increased by habitual 

 employment of particular muscles, 587; 

 diminished by want of action, 588 ; in- 

 fluence of nerves on, 589 591 ; loss of, 

 from section of nerves, 589 b, c ; restored 

 after exhaustion, 589 d; an independent 

 endowment, 591 ; difference of, on two 

 sides of heart, 585; the same at different 

 degrees of contraction, 592 ; power gene- 

 rated by, in Man, 598; in Insects, 599 

 Tonicity of, 593597 ; effect of heat and 



cold upon, 593, 594 

 Contraction of, after death, 595 597 



Muscular Contraction, influence of, on Circu- 

 lation, 744 c 



Muscular Sense, 433, 434 



Tension, maintained through Spinal 



Cord, 398, 399 



Musk-deer, blood-corpuscles of, 146 a, 151 ; 

 hair of, 166 



Myolemma, 227, 235 



Myopia, 538 



Myxinoid fishes, 180 



Myriapoda, nervous system of, 326; develop- 

 ment of head of, 426 a 



N. 



NAILS, 162, 165 



Necrsmia, 70S 



Negro races, 9799 



Nerves, origin of, in ganglia, 246, 247; termi- 

 nations of, in muscles, 239 ; in skin and 

 sensory organs, 248 ; mode of determining 

 functions of, 300306 



Nervous agency, hypothesis on its nature, 297; 

 laws of its transmission, 298, 299; not es- 

 sential to Nutrition and Secretion, 620, 624 ; 

 influence of, on organic functions, 625 628 



Nervous circle, 433 



Nervous System, general functions of, 289, 307 ; 

 elementary structure of, 241 253; fibrous 

 matter of, 242 244 ; vesicular matter of, 245, 



246 ; arrangement of fibres in ganglia, 246, 



247 ; afferent and efferrnt fibres of, 289, 344 ; 

 use of plexuses in, 298; isolated course of 

 single fibres, 298; general purposes of, 307 

 309; dependence of its activity upon supply 

 of blood, 290, 291 ; functional activity of, in- 

 volves disintegration, 292 296; nature of 

 changes in, 297; existence of in lowest Ani- 

 mals, 311, 312; general recapitulation of 



functions, 496 498; peculiar conditions of, 

 499 501 ; pathological states of, 501 505 

 Nervous system of Radiata, 313, 314; of Mol- 

 lusca, 315 323; of Articulata, 324 336; of 

 Vertebrata, 337362 



Nervous tissue, 241 253; fibrous element of, 

 242 244; cellular element of, 245, 246; re- 

 lation of two structures in, 246 248; com- 

 position of, 249; nutrition of, 250, 251; first 

 development of, 252; regeneration of, 253; 

 disintegration of, with use, 292 296; decay 

 of, when not employed, 442 

 Neuro-skeleton, 20 



Newport, Mr., his observations on the blood- 

 corpuscles of Insects, 156; on their nervous 

 system, 325330; on their temperature, 

 889 c ; on development of head of Myria- 

 poda, 426 a 



Nitrogen, proportion of, in different articles of 

 food, 647; exhalation and absorption of, 

 766; respiration in, 769, 780; amount of, in 

 blood, 770 

 Nostoc, 125 



Nucleus, 124; its offices and metamorphosis, 

 in Plants, 124, 125; in Animals, 128 133 

 Nucleus-filaments, 138 

 NUTRITION, 



General account of, 273, 274, 781 ; connec- 

 tion of, with nervous system, 279; not de- 

 pendent upon nervous agency, 624; but 

 influenced by it, 624, 625 

 Essential nature of, 782; a continuous pro- 

 cess of cell development, 782, 783; select- 

 ing power of individual parts, 784, 785 

 Varying activity of, 786 791 ; affected by 

 age, 786 ; hypertrophy, 787, 788 ; atrophy, 

 789791 



Reparative processes, 792 801 ; reproduc- 

 tion of parts in lower Animals, 792; union 

 by first intention, 793, 794; organization 

 of liquor sanguinis, 119, 795; organization 

 of blood, 700, 796; modelling process of 

 Dr. Macartney, 797 ; circumstances favour- 

 able to, 798; granulation, 799 801 

 Abnormal forms of Nutritive processes, 802 

 809; inflammation, 802 804; suppura- 

 tion, 805, 806; tubercular deposit, 807. 

 808 ; cancerous growths, 809 

 Varying duration of different parts, 810 

 812; limited term of existence of cells, 

 811; variation of, with period of life, 812 

 Death, or Cessation of Nutrition, 813 816; 

 somatic and molecular, 813; somatic, by 

 Syncope, 814 ; by Asphyxia, 814; by Cold, 

 814 ; Molecular, consequent upon somatic, 

 815; dependent on local change, 816 



O. 



OBLIQUE muscles of orbit, 451 

 Oceanic races, 102 

 Octopus, nerves of, 298 

 Odoriferous glandule, 872 

 Odorous matter in blood, 872 

 Odours, sensibility to, 531, 532 

 (Esophagus, descent of food through, 386,656 

 Oleaginous principles of food, 640, 641 ; de- 

 stination of, in Animal body, 643 646, 671 



