196 



PHYSIOLOGY OF MUSCLES AND NERVES. 



cross-section, near the acute angle. In the longitudinal 

 section they form spiral lines, which run obliquely round 

 the outer surface of the cylinder. The electromotive 

 equator, which unites the points at which the greatest 

 positive tension prevails, forms a line round the circum- 



FiG. 53. The curkexts in a regular muscle-rhombus. 



ference, which separates the rhombus into two equal 

 halves. 



Supposing tliat a plane is drawn in such a regular 

 muscle-rhombus, through the small axis of the elliptic 

 cross-sections, a rectangular figure will be obtained. 

 The muscle-fibres l3"ing in such a section are all cut 

 in a similar way, and their condition is exactly alike. 

 Therefore in this section also the greatest tension on 



