nl M((\ i \li 



207 



Bhape "i the letter II '•>• merelj alia t<» 



bleed into b graduated tube and seeini the blood columi 



tn tr.-i\ el from one ei This mel i I 



value in measuring the velocity of flom from small 

 \>-iii^ coming from glands and muscles For larf 



muhr is employed. There are numerou tromuhr; I 



Bhown in the diagram Ludwig'c Pig. 62 \ liull»s 



united above, and com ted below with tubes that open flush with the 



surface of ;i brass disc This is pivoted at its center with another similar 



platform also having flush w itli the surface the opening 



nected with the <-ut ends of tin' artery or vein. In a certain p 



tli«' platform, the tubes from the artery <>r vein are < 



those of the bulbs, bo thai the blood can i1<>\\ from one end of ,; • 



' 





* 1 



( I 



;. 



■ 



•i(jtl thr 



i on l 



fluiih 



•lood 

 id. 



through tin' Imllis to the other end. To us< strumei I 



mal bulb is filled with <>il and the peripheral one with pin 



The clip is then removed from the central end of ti 



flows in and «li- the oil, which in turn d 



peripheral end of the artt i • \\ 



the tube joining the two bulbs, the instruim thai 



the oil is broughl bac in into ti 



being effected bo quickly that 1 1 



flow 'i' ; pci ition is I in tli 



Count ii - juratel) the numb< 



number of rei olut ioi h bj ti 



