THE STRUCTURE OF MUSCLE. 



91 



semi-fluid, but it hardens and becomes solid immediately 

 after death. 



Examined, with high magnifying powers, in this 





Fig. in. — A.<(tacus fluvkitUls.—A.. a single muscular fibre; transverse 

 diameter ijo^h of an inch; B, a portion of the same more highly 

 magnified ; C, a smaller portion still more highly magnified ; 

 D and E, the splitting up of a part of fibre into fibrillge ; F, the 

 connexion of a nervous with a muscular fibre which has been 

 treated with acetic acid, o, darker, and h, clearer portions of the 

 fibrlDae : n, nucleus of sarcolemma ; nr, nerve fibre; s, sarcolemma; 

 f , tendon ; 1 — 5, successive dark bands answering to the darker 

 portions, a, of each fibril la. 



