280 



IXDKX. 



Lie. trieiiy, ;miin:il, 49 



disappearance when te- 

 tani/'-d, ."'" 



Du Bois lii-ymoud on, 



50 



TIM -ehanical \viirk substi- 



tute,! for. .M 

 D'Esterno on flight of birds, 221 



F. 



Fibre, striped ami un. striped, 28 



and tendon, 69 



in old age replaced by t> inl'n, 



98 

 Force, what, 5 



all can be reduced to motion, 8 



indestructible, t!, 13 

 potential, 12, 14 



Flight, see Win;,'. 



of bux/anl, 2G1 



of birds, 2u'.i 



of pigeon, -jri'i 



inechani.sm "f, imitated, 277 



sailing, "f birds, 'J21 



Blight waste of substance in, 



213 



Frog, signals, 32 



"Function makes the organ," Guerin, 

 84 



G. 



Gorilla, skull in old and young, 90 

 lim-riii on club foot, 97 



on change of bones through 



age, '.'u 



theory of function, 84 



11. 

 Hartin"s on ratio "f bird-,' \viiiL r >t 



weight, -!*;, -J24 



II. at, animal, 19 



loxs of, in external organs, -_"J 

 un I'hanii'al equivalent <>l, l ." 

 unit of, 13 



Helmholtz on contraction of muscles, 

 4t> 



/ on lost time in mn.srnlar 



adion, 48 

 lIiTilciihi-im's cxiicriiin nts mi h.-at 



and work, 17 

 Him on hr.it and work, 18 



I biiiiolngy nf llillsc'lr-, 7'! 



Jlorsr not jn-ojcrtrd into air, 156 



paces of, I-"; 1 



]iowrr. 



transition of paces of, 172 



various authors on, II.". 



Vilirrnt 'and I Miill'oli nil, 151 



xoiitro]ir ligun-s of, 177 

 Hovering of birds, -j-Jl 

 llumerus, curvatures in brad of. i;> 



a contorted fnuur, '.'1 



I. 



India-rubber, change of heat into 

 work in, 39 



J. 

 Joule on equivalence of force, 15 



K. 



Kalridophone rod, Inn-ing of, 191 

 with wing ot 



wasp, ]::', 



Kangaroo, development of crural 

 s in, 71 



Lamarck's development theory, 77 

 Latoiir on movement of bird s \\inu, 

 212 



Lavoisier's theory of animal heat. 2'' 

 Levers in animal skeletnn, i'.."i 

 Liais on double action of bird's 



\\ing, 27=5 

 Lite, organic acts nf, 28 



MI relal Ion, -^ 



Lneiiiiiotiiin. aerial, ISO 277 



aijiiatii-, lnii 

 terrestiial, K'2 



