HEMOGLOBIN 



189 



Flu. 57. 1, Solar spectrum. 2, Spectrum of oxyhasruoglobin (0-37 p.c. solution). First band, A 589- 

 564 : second band, A 555-517. 3, Spectrum of haemoglobin. Band, A 597-535. 4, Spect-um of CO- 

 hEernoglobin. First band, A 583-56 i ; second band. A 547-521. 5, Spectrum of methaemoglobin 

 (concentrated solution). 6, Speatrum of methaemoglobin (dilute solution). First band, A 647- 

 622 : second band, A 587-571 ; third band, A 552-532 ; fourth band, A 514-490. 7, Spectrum of 

 acid haematin (ethereal solut'on). First band, A 656-615 ; second band, A 597-577 ; third band, A 

 557-529; fourth band, A 517-488. 8, Spectrum cf alkaline hsmatin. Band from A 630-581. 

 9, Spectrum of hasmochromogen (reduced hsematin). First band, A 569-542 ; second band, A 

 535-504. 10, Spectrum of acid ha3matoporphyrin. First band, A 607-593 ; second band, A 585- 

 536. 11, Spectrum of alkaline ha^matoporphyrin. First baud, A 633-612 ; second band, A 589-564 : 

 third band, A 549-529; fourth band, A 518-488. The above measurements (after MacMnnu) are 

 in millionths of a millimetre. The 1 quid was examined in a layer 1 centimetre thick. The edges 

 of ill-defined bands vary a good deal with the concentration of the sohitions. 



