PLATE 29 



169 



170 



72 



., 



173 



74 



169. /9-Oxyhemoglobin of the Mule (Equus asinus d 1 X Equus caballus 9 ), showing composite twin 

 of horse-type. 



. 



170. Same, showing prismatic and tabular types of crystals. 

 1(1, 172. ,9-CO-Hemoglobin of the Mule, showing co 



type. 



. 



composite horse-tvpe twins and simple crystals normal 

 . 



173. Same, showing elongated horse-type twin. 



174. a-CO-Hemoglobin and ,9-CO-Hemoglobin of the Mule, showing ends of n-CO-hemoglobin crystals 



growing from protein ring, and elongated horse-type twin of /9-CO-hemoglohin. 



