524 L. ZUFA 



Thimann, K. V., and A. L. Delisle. 1939. The vegetative propagation 



of difficult plants. J. Arn. Arb . 20: 116-136. 

 Thimann, K. V., and A. L. Delisle. 1942. Notes on the rooting of some 



conifers from cuttings. J. Arn. Arb. 23: 103-109. 

 Thomas, J. E., and A. J. Riker. 1950. Progress on rooting cuttings of 



white pine. J. Forest. 48: 474-480. 



FLOOR DISCUSSION 



Due to time being limited in this panel, this paper was offered only 

 in abstract form and there was no discussion. 



. 





