520 Experiments on Kyanized wood, fyc, 



about the 15th of June, and then only slightly, and if this was 

 owing to the nature of these compounds, their action must have 

 been very slow. 



The shavings of Kyanized wood in No. 7, had a decided effect 

 upon the plant. In twelve days this effect was apparent by the leaves 

 curling at their edges and turning yellow, and on the 15th of May, 

 about six weeks after it was placed in these circumstances, the plant 

 was removed without a leaf and nearly dead. It was then put into 

 No. 4, where the weak muriatic acid was, and in four weeks was 

 perfectly recovered. Another healthy plant was placed in the 

 glass out of which this was taken, and this also suffered in the 

 same manner as the last, the only difference being that it was not 

 affected so rapidly. This may easily be explained, as the matter 

 which is injurious to vegetable life may in the course of time pass 

 off, and that which is left may be too weak to be productive of any 

 bad effects. 



It is worthy of remark that all the substances which proved 

 detrimental to the plants affected them in the same way, namely, 

 by making the leaves curl at the edges and become dry and 

 yellow. 



In conclusion I will only mention two or three instances which 

 have come under the observation of others who have used this kind 

 of timbe A frame was made of this wood for the growth of 

 melons in the garden of the Society, but it was found impossible 

 to succeed with it. In the Gardeners' Magazine for Sept. 18.39, 

 Earl Man vers states, that he had some rafters " steeped in the 

 solution at the strength of one gallon of corrosive sublimate to ten 

 gallons of water," and that the effects upon vegetable life were of 

 the most injurious kind, three fine healthy vines being killed and 

 the health of the others very much affected. And finally, Messrs. 

 Loddiges of Hackney, were induced to use it upon an extensive 

 scale in rafters for their orchidaceous house, and for many other 

 buildings in their extensive nursery, where its bad effects were soon 



