The laws and mechanics of circulation, with the principle involved in animal movement . f Gold. The muscle cells are distinctlyshown, and three are visible, each containing several nuclei. P. 61 (Oc, 3 ; obj. 8).Klein. in which development repeats itself, we have the transitionalstages in muscle evolution also manifesting itself, the fusiformcells of non-striated muscle fibres inosculating and under-going progressive striation (Fig. 210). Then, again, wehave experimental evidence showing electrical phenomenain the muscles during musculation, notably: 1. Every cross-section of a striated muscle
The laws and mechanics of circulation, with the principle involved in animal movement . f Gold. The muscle cells are distinctlyshown, and three are visible, each containing several nuclei. P. 61 (Oc, 3 ; obj. 8).Klein. in which development repeats itself, we have the transitionalstages in muscle evolution also manifesting itself, the fusiformcells of non-striated muscle fibres inosculating and under-going progressive striation (Fig. 210). Then, again, wehave experimental evidence showing electrical phenomenain the muscles during musculation, notably: 1. Every cross-section of a striated muscle represents a negative pole of anelectric current, and every longitudinal section a positive pole;and it is immaterial whether the section be made with a knifeor corrosive substance ; while muscles which are rigid, or which STRIATIC^ AND NERVOUS FORCE. 499 have been killed without rigor being induced, exhibit nocurrent. Du Bois-Reymond (Hermann). 2. That duringthe passing of a wave of contraction along the bundle of fibres,produced by stimulating the end, that the different spots in. Fig. 210.—Muscular Fibres from a Foetal Sheep in Process of Striation.—Frey. a, &,Very long fusiform cells, two or three nuclei and commencing striations ; c, d, por-tion of a somewhat more mature fibre, with numerous nuclei and considerablediameter ; e, /, g, fibres still further developed, with nuclei in the axis ; h, nucleibeneath the envelope ; i, a fibre breaking up into thick disks. succession on the longitudinal surface become negative inreference to other spots, there being a negative wave, as itwere, which travels along at the same rate as the wave of con- 500 STRIATION AX1) NEK VOLS FORCE. traction, viz., aboat three metres per second (Bernstein*)fAt each point the negative state, which first increases andthen decreases, lasts about vhs of a second ; it is entirely goneby the end of the latent period, which lasts T*ff of a point in a fibre must therefore first of all unde
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