152 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



conducted on a larger scale than would otherwise have been the 

 case owing to the attention, not altogether favourable, attracted by the 

 portions of the Fifth Eeport which dealt with the same subject. The 

 fact that the trials have been made with over 2,000 trees, planted by ten 

 persons in seventeen localities, compels us to give the conclusions arrived 

 at our earnest attention, however much they may be at variance 

 with our preconceived notions and the accepted ideas of good practice. 

 See notes under " Fruit Trees " and " Paradise Stocks." — A. P. 



Woburn, Tenth Report, 1909. By the Duke of Bedford, K.G., 



and Spencer U. Pickering, F.B.S. — This Eeport is founded on observa- 

 tions made during 1908 on the treatment of trees for insect pests. See 

 notes under " Insecticides," " Psylla," " Paraffin," and " Woolly Aphis." 



A. P. 



Woolly Aphis on Nursery Stock and Young- Trees. By the 



Duke of Bedford, KG., and Spencer U. Pickering, F.B.S. (Woburn, Tenth 

 Eeport, 1909, pp. 2-12). — Fumigation with hydrocyanic acid being 

 dangerous alike to the operator and the trees, and not always fatal to the 

 aphis, two simple and effective substitutes have been found for it — the 

 bodily immersion of the trees in petrol (not ordinary lighting oil) for five 

 minutes, or in water at 115° F. for ten minutes, the latter method being 

 recommended as it entails less risk to the trees, the mortality among them 

 being only 5 per cent, as against 10 per cent, after the petrol treatment. 



A. P. 



Yew, Distribution of, in Germany. By F. Kollmann (Nat. Zeit. 

 Land-ForsL, Vol. 7, pp. 217-247, 6 figures, April 1909).— Notes on the 

 occurrence of yew in various parts of Germany as a wild plant. — W. G. S. 



