200 



PHYSIOLOGY OF MI'SCLKS AND NERVES. 



surface , ,f which (turned toward tlir hone of tin- lower 

 le^-jis torn i "d solely of muscle-fibres, exhibiting a delicate 

 longit udinal streak a< the only indicat inn of tin- tendon 

 buried within it; th' .-irclifd dorsal surface is, on the 

 contrary, clothed, as regards the lower 1 \vo-t hinls of its 

 length, with tendonous sult:uicc wliich passes below 

 into the so-i-iilh.'d ti-,t<l<> JrA/7//s. 



It is evident that such a muscle has naturally an 

 oblique cross-section, represented by this tendonons 

 covering, and a longitudinal section which includes the 

 whole of the flat, and a little of the curved portion. 

 This muscle can, therefore, without any further p;v- 



!';<;. ," I. Tin: cruuKSTs <u A i..\>Ti;orNi:.\iii s. 



paration afford currents; for \\hich reason it maybe 

 mos' advantageously used in a large number of experi- 

 ments. 



lien'ardiiig once more the structure of t he <//>//- 

 <'ii' mius, as it has just been doeribed.a natural loii^itu- 

 din;d section i- reco^nisMbli- in the whole Hut part and 

 a litt le of the upper portion of the curved surface : and 

 a nat unil cross-sect imi is to be recognised in the ^re.-iti'i- 

 and lower ]iart of the <-iirved tipper surface. No second 

 cro8S-S( ct ion exi>ts in (hi- muscle, i'or the upper tendon 

 is buried \\ it hin the muscle. The currents which the 

 -:'iid< through an ardi applied so as to connect 



