THE BLOOD 



95 



percentages of the amount of oxyhaemoglobin present in I, of 

 haemoglobin in II. The width of the shadings at each level represents 



Fig. 35. — Stand for direct-vision spectroscope : S, spectroscope : T, test-tube for coloured 

 < substance under investigation. 



the position and amount of absorption corresponding to the per- 

 centages. 



Pig. 36. — Graphic representations of the amount of absorption of light by solution (I) of oxyhaemo- 

 globin, ( 11) of haemoglobin, of different strengths. The shading indicates the amount of absorp- 

 tion of the spectrum ; the figures on the right border express percentages. (RoUett.) 



The characteristic spectrum of oxyhaemoglobin, as it actually 

 appears through the spectroscope, is seen in the next figure (fig. 37, 



