268 



PHYSIOLOGICAL CHEMISTRY 



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FIG. 84. HEMIN CRYSTALS FROM HUMAN BLOOD. 



Reproduced from a micro-photograph furnished by Prof . E. T. Reichert, of the University 



of Pennsylvania. 



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FIG. 85. HEMIN CRYSTALS FROM SHEEP BLOOD. 



Reproduced from a micro-photograph furnished by Prof. E. T. Reichert, of the University 



of Pennsylvania. 



