1917] 



on The Treatment of War Wounds 



5^ 



and it is a question of watching them for weeks — we find that the 

 coloured water is drawn up into the open limb of the plugged siphon 

 in the manner shown. In the case of the open siphon nothing 

 of this sort occurs. 



In the next experiment (Fig. 13) we have a series of three tubes 



W^ 



Fig. 13. — Tube A contains uncoloured water ; Tube B, water 

 coloured witb metbylene-blue ; and Tube C, saturated salt solution. 

 Thefluids stood originally at the same height in each tube. 



arranged tandem and connected up by wicks of moist l)andage fitting 

 quite loosely in siphon tul)es. We have in Tube A plain uncoloured 

 water, in Tube B water coloured with methjlene-blue, and in Tube C 

 saturated salt solution — all these being filled in to exactly the same 

 height, and then protected against evaporation. We now observe 

 that the level of the fluid in C s-raduallv rises, while that in A and B 



