GENERAL PROPERTIES: THE CORPUSCLES. 



431 



bands become darker and wider and finally fuse, while some of the 

 extreme red end and a great deal of the violet end of the spectrum 

 are also absorbed. The variations in the absorption spectrum, 

 with differences in concentration, are clearly shown in the accom- 

 panying illustration from Rollett * (Fig. 184) ; the thickness of the 

 layer of liquid is supposed to be one centimeter. The numbers 

 on the right indicate the percentage strength of the oxyhemoglobin 

 solutions. It will be noticed that the absorption which takes 



C D E b F 



6£li 650 6W 630 620 610 600 5^ 580 S70 560 550 51*0 5X 526 510 500 m m 



l.,iM.L,in,lHj,i,ilmil.iiilMjlMlliiiJiiMlmllrMiliiMLlrilmtliMilinJilMluilM/jliijM.,liMilii|ilMjM|ilMiJiM,lMMLi^ 



10 



11 



f^^w^w*^ 



12 



13 



ZI 



3 





Fig. 183.— Table of absorption spectra {Ziemke and Mailer): 1, Absorption spectrum 

 .f oxyhemoglobin, dilute solution; 2, absorption spectrum of reduced hemoglobin; 3, ab- 

 sorption spectrum of methemoglobin. neutral solution ; 4, absorption spectrum of met- 

 hemoglobin, alkaline solution ; 5, absorption spectrum of hematin, acid solution; 6. ab- 

 sorption spectrum of hematin, alkaline solution. 



place as the concentration of the solution increases affects the 

 red-orange end of the spectrum last of all. 



Solutions of reduced hemoglobin examined with the spectroscope 

 show only one absorption band, known sometimes as the "^--band." 

 This band lies also in the portion of the spectrum included between 



* Hermann's "Handb'jch der Physiologie," vol. iv., 1880. 



