376 



Prof. A. J. Brown and Mr. F. Tinker. 



shows some typical absorption results, whilst Diagram II shows them 

 graphically. The falling off of the absorption rate and also of the weight 



roo 



I IO 



si 





















s 



/ 



/ 











1 



C 3 



C ) 



<. 1 



/ 



/ 



/ 



( : 



< 











1 



f 





/ 



/ 



/ 















i 





¥- 

















r 





j 















i 





















A 



















— -f—t 

 c / ' . A 





































A 



















o 



Per cent, acetic acid 

 Concentration of solution outside seeds 



Diagram I. — Acetic acid solutions. 



of solution absorbed is very noticeable above the 80 per cent. mark. Pure 

 acetic acid is not absorbed by dry seeds at all.* 



Table IV. — Absorption Curves for Water- Acetic Acid Mixtures. 



Strength of acetic 

 acid solution. 



Percentage gain in weight of seeds, due to absorption of 

 solution after 



2 days. 



3 days. 



6 days. 



9 days. 



13 days. 



per cent. 

















36 -4 



48 -6 



55 -8 



64 -5 



68 -3 



20 



37-0 • 



49 6 



59 -8 



66 -7 



69 4 



38 -5 



33 -1 



45 -2 



52 -3 



63 -0 



68 -9 



55 -5 



31 -7 



44-6 



52 -4 



63 -8 



70 -6 



71 '4 



32 -9 



45 "3 



53 -7 



66 5 



74 -3 



83 "3 



27 -8 



43 -2 



49 -7 



61 -9 



68 -3 



90 -9 



13-5 



19 -8 



26 -8 



43 -4 



55 -0 



100 



5 5 



9-2 



8 -9 



10 -9 



13 5 



* Loc. cit., A. J. Brown, ' Boy. Soc. Proc.,' B, vol. 81, p. 82 (1909). 



