by Green Plants from certain Organic Compounds. 159 



A. On Cat Branches. 



Solution used. 



Plants. 



Results. 



The culture solution 

 + 0*2 per cent, 

 acrolein 



Acer pseudoplatanus 

 Phaseolus vulgaris 

 Ranunculus acris 

 Cheiranthus Cheiri 



No formation of starch 

 (5 days). The leaves 

 became unhealthy. 



B. Solution applied to the Roots. 





Acer pseudoplatanus (3 plants) 

 Phaseolus vulgaris (4 plants) 



No formation of starch 





(6 days). 



The plants were evidently injured by this solution, presenting a 

 yellowish appearance at the end of six days; one of the plants of 

 Acer and three of the Phaseolus failed to recover their normal growth 

 when planted out, and ultimately died. 



C. Solution applied to Surface of Leaf. 



Solution used. 



Plants. 



Results. 





Tilia Europcea (3 leaves) 

 Phaseolus vulgaris (5 leaves) 



No formation of starch (5 

 days). Leaves became 

 yellow when the solution 

 had been applied. 



No. 1. — Experiments ivith Acrolein (continued). 

 II. Acrolein compounds — • 



(a.) " Acrolein Ammonia." 

 A, On Cut Branches. 



Solution used. 



Plants. 



Results. 



The culture solution 

 + '5 — 1 per cent, 

 acrole'in-ammonia 



Same solution as 

 above (A) 



Alisma plantago 

 Tilia Europcea 

 Acer pseudoplatanus 

 Scrophularia aquatica 



B. Solution supplied to B( 



Cheiranthus Cheiri 

 Quercus robur 



Campanula glomerata (2 plants) 



No formation of starch (4 

 days). Leaves not visi- 

 bly injured. 



)ots. 



No formation of starch (6 

 days). 



