

Km 



cause the clottii udual 



w hen it i ura 



Tin- blood musl ;ilw ;i\ b be eo in tin 



ae iii oontacl with the Bame kind and amount 



To this it max be added thai the receiving 

 clean; an) trace of old blood elol ni nun i- 



a '.'a i list. 



I The end point mus1 be sharp. I- 

 difficulties are met with in making pi | 



greatly t<» be desired thai differenl ii 



form method. For experimental pui l 



.M • • i n 1 1 ■ 1 1 } i .- 1 1 1 T is no doubl the I <1 it h.-is the adde< 



giving a graphic record of th< rvatioi 



(Fig, 19 shows the principle of the method 

 through a standard cannula (C into a tube / •"• cm. lot 



i 



I 



■ In. hall. I' 





internal diameter; and a loop 2 mm. 



copper wire /' . which is 8 cm. long and m. in 



lowed to fall gentl) into the blood 



of the w ire is articulated w ith the shoi t 



poised thai w hen the Btop R . which 



position, is released, the w in 



• >n the blood in tin- tub< I 



a w riting point, w hich is made to it 



So long as the blood is unc 



is released and a vert 



the loop Bticks on the blood and 1 1 



For clinical purpo 

 is lis.-. |. the method of 1 1 



•Am. Jour. 



