220 



OXY-H^MOGLOBIN. 



co 



FIG. 36. (After Preyer and Gamgee.) THE SPECTKA OF OXY-H^MOGLOBIN IN 

 DIFFEBENT GKADES OF CONCENTRATION, OF (REDUCED) HAEMOGLOBIN AND OF 

 CARBON- MONOXIDE-HEMOGLOBIN. 



1 to 4. Solution of Oxy-haemoglobin containing (1) less than -01 p.c., (2) -09 p.c., 

 (3) -37 p.c., (4) -8 p.c. 



5. ,, ,, (reduced) Haemoglobin containing about '2 p.c. 



6. carbon-monoxide Haemoglobin. 



In each of the six cases the layer brought before the spectroscope was 1 cm. in 

 thickness. The letters (A, a &c.) indicate Frauenhofer's lines, and the figures wave- 

 lengths expressed in 100,000th of a millimeter. 



