80 



Geometrical relation of Nuclei 



solidification or change in consistency of the fluids of the cells of 

 a hot blooded animal. I am not clear how far this is due to loss of 

 heat or how far it is due to loss of vitality. By use of a hot stage 

 I have seen the spherical segments regain their oval and mutually 

 compressed condition. But I have not as yet succeeded in ob- 



Fig. 38. A, ovum of rabbit 2 segment stage after removal from the Fallopian tube 

 and examination in aqueous humour (rabbit) at the ordinary room temperature. 

 Drawn with camera lucida. B, the same under the same conditions 45 minutes 

 later. The segments are more spherical. C, the same after another 35 minutes 

 during which the heat of the stage had been raised approximately to blood heat. 

 The segments had regained their oval condition and more closely pressed 

 together though internally there was a distinction between an inner granular 

 and outer clearer part not noticeable in the egg when first seen in the Fallopian 

 tube. The polar bodies showed "amoeboid movements." D, the same two 

 hours later during which time the high temperature had been maintained. 

 The outer clearer ectoplasm has diminished in extent. E, the same three 

 hours twenty minutes later; the general appearance is now quite normal. 

 F, the same some twelve hours later during which time the temperature had 

 sunk to that of the room. 



serving the division of a segment so cannot say whether the change 

 is due to physical condition change, or to a re-attainment of 

 vitality. 



Przibram, when writing of the significance of the processes of 

 cell division, refers to the analogy between the mitotic and certain 



