CANCER 



145 



cells would start precipitately from the main tissue ; they 

 would become spherical in shape, then oval, and then oblong. 

 One end would shoot out, like a microscopic comet, and form 

 a tail ; just as quickly, this tail would separate itself from 

 the main body, and perhaps ultimately give birth to new 

 cells of its own." 



That does not in the least resemble ordinary mitosis 

 but is very like Lavdowsky's " cell division by force." 

 Thoma gives an illustration of this : 



//AJJj 



/n. 



//.^J.j/^/J7uraf/oft //5S 



//.^. j^Mu/affoff /2h. 



/2./ sA'mu/afic/^ /2.3 



/2.8 /fofi/r/fyefj;fy/Ttty/af/a/7 



/2.JP 



■J^^ 



/2./S 



/y^JOO' 



Figure 100a.— a white blood corpuscle from the frog, in aqueous humour 

 on a warm cover glass. Changes observed during repeated 

 stimulation by electricity. The numbers at the side show the 

 time of day. {Alter Thoma.) 



