INDEX. 



281 



Lost time in muscle, Helmholtz, 43 

 Lucy, M. de, on wings of birds, 222 

 Lungs, not seat of combustion, 23 



M. 



Marey's myograph, 32 

 Matteucci on torpedo, 52 

 Mechanical work, estimation of, 61 



— — forms of, 60 

 Mechanism of flight, reproduced, 



277 



Modification of animals, 100 



— of men, 101 

 Momentum, divided between gun 



and carriage, 110 

 . Moreau on torpedo, 53 

 Motion, all force reduced to, 8 

 — alternate in living motive 

 powers, 66 

 Motors, living, dynamic energy of, 68 

 Movements, see Tracings 



caused by muscles in 

 insect's wing, 196 



— of snail, 105 



— of wing of birds, 226 



— — insects, 195, 



197 



Mnschelbroeck on torpedo, 52 

 Muscles, absorption of, from disease, 

 96 



— adaptation of, to function, 



95 



— change of, by age, 99 



— — by experiment, 



101 



— fatty degeneration of, 97 



— harmony between form and 



function in, 77 



— homology of, 73 



— in jaw of carnivora, 90 



— in man and ape, 75 



— large, slight contraction of, 



62 



— lateral dilatation of, 36 



— long and short, 70 



— mechanical force in, 39 



— pectoral in birds, 72, 211 



— penniform, 70 



— use of, acquired by habit, 



29 



Muscles, work of, 47 

 Muscular current, negative varia- 

 tion of, 50 



— contraction, tone heard 



in, 46 



— force of birds, 213 



— — of tissue, 64 



— shocks, 50, 51 



— system, variation in, 94 



— tissue, specific force of, 



64 



— wave, 35 



— — speed of, 38 

 Myograph, explanation of, 31 



Nerve, function of, 41 

 Nervous agent, speed of, 42 



— — Du Bois Reymond 



on, 41 



— centres command action 



without the influence of 

 the brain, 29 



— tetanus, 45 

 Notation of paces, man, 134 



— — horse, amble, 142 



— — — gallop, 165, 



lQ%,etseq. 

 — trot, 144 . 



— — — — irregu- 



lar, 156 

 __ walk, 142, 

 163 



— — synoptical tabla 



of, 145 



— rule, 175 



Oscillation of body, 118 

 Oxidation of blood, 20 



P. 



Passades of birds, 220 

 Penaud's flight instrument, 277 



