268 JOUENAL OF THE ROYAL HORTICULTURAL SOCIETY. 



of wood in the stem or in the formation of new roots. Peaches used the 

 greatest amount per acre, apples and quinces followed, while plums and 

 pears came third. The proportions in which the various constituents 

 were used varied little and were as follows : 1 lb. of nitrogen, -27 lb. 

 phosphoric acid, 1*14 lb. potash, 1-35 lb. lime, and -45 lb. magnesia. 

 The relative amounts of these constituents in the different parts of the 

 trees naturally vary very greatly, and tables are given showing this. 

 The amounts of food used per acre by the trees on the basis of the present 

 experiment, the trees being of average size, will be as shown in the 

 following table : — 



KiAd 



No. of trees 

 per acre 



Nitrogen 



Phosphoric 

 acid (P,0J 



Potash 



Lime 



(CaO) 



Magnesia 

 (MgO) 







lb. 



lb. 



lb. 



lb. 



lb. 



Apple . 



35 



51-5 



14-0 



5o-0 



57-0 



23-0 



Peach . 



120 



74-5 



18-0 



72-0 



114-0 



35-0 



Pear . 



120 



29-5 



7-0 



33-0 



38-0 



110 



Plum . 



120 



29-5 



8-5 



38-0 



41-0 



13-0 



Quince 



240 



45-5 



15-5 



57-0 



65-5 



19-0 



F. J. G. 



Plants in pans, Alpine. By H. Raphoe {Garden, No. 1784, p. 56 ; 

 January 27, 1906). — Although not everyone has it within his means and 

 scope to lay out a rock-garden on a large scale, with stones by the truckload, 

 and shrubs and plants in thousands, yet anyone who has a little corner of 

 sunny ground may grow many charming alpines ; and even if one has 

 no garden, properly speaking, there may still remain the pcssibility of 

 growing these delightful plants in pans. In some respects, indeed, the 

 pictorial value of alpines is greatly enhanced by their being grown in this 

 manner ; partly because, properly treated, certain kinds seem to flourish 

 better thus than in the open rockery ; but principally, perhaps, because 

 one can then so easily have them placed for observation just under the 

 eye. For the lover of flowers, who is infirm or an invalid, such a con- 

 sideration may be a very important one. — E. T. C. 



Plant Medication {Le Jardin, vol. xx. No. 453, p. 8 ; January 5, 

 1906). — An interesting account of extra-radical nutrition and vegetable 

 therapeutics. In 1899 M. Breal pointed out that various substances 

 might be administered to plants by way of absorption through the trunk, 

 and the subject has since been worked out by M. Mokrjetsky, who finds 

 that salts introduced beneath the bark are quite as effective as the 

 injection of solutions. The course of the drug in the sap can be 

 followed by the aid of any ordinary colouring matter, and is found to 

 run upwards in a spiral course, and downwards from the point of 

 insertion. A chlorotic pear tree was dosed with four grammes of pyro- 

 phosphate of iron and soda, introduced through a hole in the trunk. It 

 was found that only the branches on the same side as the hole benefited 

 by the treatment, and the foliage became of a dark green, while on the 

 opposite side the leaves remained chlorotic. Further, while the diseased 

 branches were shortly afterwards attacked by the fungus SeiJtoria Pyri, 

 the medicated branches showed no trace of it, proving that the injection 

 served to increase nutrition and resistance to disease. 



