96 THE KKOC chap, 



network into which the blood is passed by the arteries, and 

 from which it is received into the veins. 



FiG. ,:4.— Blood-iusselsof ihc ueljufa rr.,^\ foot seen uixler ., lou mat-nifi in-- imuer 



«. s„K,ll artene.l r. .,n:>ll veins Tlie minule u,l,es ioinin^ the arteries In tin' 



>..-in. are the ea|i,llar,es. he an,,„s shu„ the .h.eelio,, of the cinulalio,,. 



1 the small ,,ort,on n.arked off, the |,n;.i,ein e, lis, „hieh occur ih, o,i.,;h„„t 



th.. weh, are ,,ls,, re|„eseiuul. (I'roin Huxley's /■/inu.hgy.) 



Thus by means of the microscope we are able to take the 

 final step in demonstrating the circulation. TW fact that 



