'284 JOUENAL OF THE EOYAL HORTICULTURAL SOCIETY. 



Woolly Aphis, Sulphur-potash for. By E. E. Prescott {Jo7ir. 

 Dep. Agr. Vict., November 1909, p. 723). — For light attacks of woolly- 

 aphis the sulphur-potash paint may be used, and it will give excellent 

 results. The formula is : Dissolve 2 lb. sulphate of potash in | gallon 

 of water, and then mix in 2 lb. of sulphur. When a thorough mixture 

 is formed, add sufficient raw linseed oil to dilute it to the consistency 

 of ordinary house paint. It may then be brushed on to the parts 

 affected. This mixture will keep, and, should it thicken, it may 

 again be reduced by the addition of more linseed oil. This is a very 

 effective paint, and is easily handled where the attacks of woolly aphis 

 are too light to warrant the use of the spray-pump. — C. H. H. 



Yellow or Tulip Poplar. {U.S.A. Dep. Agr., Forest Service, 

 Circ. 93, April 1907). — The range, habit, growth, and economic uses of 

 the tulip tree (Liriodendron tulipifera), which does well and has attained 

 to large size in various parts of Britain, are here clearly narrated, as is 

 also the propagation and planting. — A. D. W. 



2 6 JUL 1910 



