by Green Plants from certain Organic Compounds. 161 



No. 2.— Experiments with Allyl Alcohol (C 3 H 6 0) (CH 2 -CH-CH 3 OH). 



The allyl alcohol was prepared in the usual manner by distilling a 

 mixture of glycerin and crystallised oxalic acid with a little 

 ammonium chloride, and rectifying the crude distillate, from 

 potassium carbonate, solid potash, and finally from lime. The sub- 

 stance used was collected in a separate receiver (93 — 95° C). 



A. On Cut Branches. 



Solution used. 



Plant. 



Results. 



The culture solution 

 + - 5 percent, allyl 

 alcohol 



Tilia Earopcea 

 Cheiranthus C/ieiri 

 Ranunculus acris 



No starch formed. Leaves 

 became yellow and flaccid 

 after 6 days. 





B. Solution supplied to Roots. 



Same solution as 

 above 



Acer pseudoplat anus (3 plants) 

 • JPhaseolus vulgaris (2 plants) 

 (Saud culture). Quercus robur 

 (2 plants) 



No starch formed in leaves 

 (6 days). Plants were 

 decidedly injured. 



On planting out after the experiment, two plants of Acer, both of 

 Phaseolus, and one of Quercus failed to resume growth, and ultimately 

 (3 weeks) died. 



No. 2. — Allyl Alcohol (continued). 

 Experiments with Water Plants. 

 Method and apparatus described on pp. 155 — 156. 



Solution used. 



Plants. 



Results. 



A. The culture solu- 

 tion diluted with 

 an equal volume of 

 distilled water + 

 0*5 per cent, allyl 

 alcohol 



B. The culture solu- 

 tion diluted with 

 twice its volume of 

 distilled water + 

 O'l per cent, allyl 

 alcohol. 



Anacharis alsinastrum 

 Char a vulgaris 



Callitriche aquatica 



Plants injured after 12 

 hours, and yellow or 

 brown after 48 hours. 

 No starch. 



No starch formed (7 

 days). Plant not injured 

 to outward appearance. 



