STUDIES IN THE EFFECT CF RÖNTGEN KAYS. ETC. 



27.S 



As tbo table shows, it seenis tluxt tlie pprniiuatiou of irnidiated seeds Avere 

 not accelerated ; it v,-as, iu fact, rather delayed. Ou Oct. 3l), the MTiter took 

 1 or 3 seedliD^^ carefully out of each group, which Imd not yet sprouted alx)ve 

 tliL" ^Mund, and examined the state of growth uudir tlie ground. Though the 

 ti)) of the radicle of strongly irradiated seeds appeared colouretl brown and 

 stumpy, as if somewhat iujiu-ctl, their cotyledon A\a3 vigorus. The control and 

 20H-plante, on the contrary, were in the first stage of growth as A'oung 

 plants. According to this fact, sfefongly iiradiated seeds may liive been 

 afected severely. The state of growth of 40 H up was almost the same 

 and there was no dilierence in growth apparent proportional to the doses 

 given. 



On April 2, 1918, 56 control plants and 12 20H-plauts remixiued and 

 the ratio of the remaiuder at the flowering time (middle and end of April) is 

 tabulated Ijelow : — 



Table ^'. 



