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the cherry due to old age leaves the peduncle on the plant. With 
long exposure (3 to 6 days) to illuminating gas, the rose is also 
sensitive to relatively low concentrations. The leaves are more sen- 
sitive than the flower buds and in low concentrations show the 
gradual yellowing of the leaflets along the main rib and the side 
veins, finally leading to leaf and leaflet fall. This response will 
take place in dilutions of ethylene as high as one part in one mil- 
lion to one part in two millions of air with sufficient time of ex- 
posure. The lilies are somewhat less sensitive and show a killing of 
the bud but no injury to the foliage, especially in the higher dilu- 
tions. It has often been claimed for lilies, tulips, narcissi, and 
other liliaceous forms that the gas causes a distortion of the 
eaves. This is not true in any liliaceous forms studied except the 
,, Considerable damage has been claimed by various florists from 
illuminating gas. This work puts into the hands of the florist the 
best way of determining whether gas is present in the greenhouse 
at any time and thereby protects him against a continual period of 
injury from gas. It has also emphasized to the gas companies the 
“Xtreme danger of injury to greenhouses from leaks in their mains 
in the neighborhood of greenhouses and is leading them to adopt 
Precautionary measures commensurate with the danger. 
The meeting adjourned for refreshments at 9:45 P.M. 
Respectfully submitted, 
Forman T. McLean, Secretary 
