PLATE LXXX. 



FIG. 196. Jloppe-Seyler'a bottle for iirepurini; 

 tibriu ( 23). 



FlU. 195. Various absorption spectra, i. o'4 per 

 cent, solution of liremoglobin. 2. Reduced hreuio- 

 globin ( 18). 3. Hieiiiatoiu ( 22). 4. Reduced luuinatin 

 ( 21). 5. o'o6 per cent, solution of 

 6. o'7 per cent, (solution ol the same ( 24). 



Fit;. iyS. Ufihulur's iia-rcuriul pump ( -7) 



K1U. 197. Alverxniiil's luercurUl pump jo). 



