1144 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



still in progress. From the present imperfect knowledge of this disease 

 it is impossible to suggest a remedy. The necessity for the destruction 

 of the contagion by the prompt cutting and burning of all infected trees 

 is shown by the marked tendency of the disease to spread from each centre 

 of infection. — M, C. C. 



Cocoa-nut Wasting- Disease. By F. S. Earle (Joum. N. Y. Bot. 

 Gard. vol. iv. Jan. 1903). — This disease is prevalent in the eastern part 

 of the island of Jamaica. The nuts fall, a few at a time. The lower 

 leaves droop and fall prematurely, while the new leaves that are produced 

 become successively smaller and less vigorous. At length the tree dies, 

 but the course of the disease is always slow, and affected trees may live 

 for months, or perhaps years. In the trees examined, a white scale insect 

 was always found at the base of the petioles, and on the fruiting peduncles. 

 In all the cases examined there was also a slow rotting of the sheathing 

 bases of the petioles, and of the fruiting sheaths. The scale insects were 

 also found on some trees which did not show recognisable symptoms 

 of the disease. Further investigations are in progress with the scale 

 insects and cultures from the diseased tissues. — M. C. C. 



Cold, Artificial, in Horticulture. By A. Baddi (Bull. B. Soc. 

 Tosc. Ort. 12, p. 363, December 1902). — The best type of a " cold green- 

 house " consists of a perfectly isolated medium, kept in complete darkness, 

 at a temperature of about 6° C, the floor of which is covered with very 

 fine dry sand, in which are placed the more delicate bulbs and also 

 roots. When one requires the bulbs or plants to flower, they are removed 

 from the cold house, care being taken that the change is not too sudden. 

 The influence of the warmth rapidly stimulates their dormant vitality : 

 Lilies, e.g., which, when grown in the usual way, require six weeks for 

 flowering, develop very quickly when their flowering is artificially 

 retarded. There appears to be no limit to this artificial retardation of 

 the development of the plants and the flowers. — W. C. W. 



Cold Spring- of 1902. Ed. (Le Jard. May 20, 1902, pp. 147 and 

 170). — The cold rains and frosts of April have caused more damage in 

 France to hardy plants than has been suffered for many years. — C. W. D. 



Cold Storage of Apples (U.S.A. Exp. Sin. New Hampshire; 

 Bull. 93 ; 10/1902). — Cold storage retarded decay, and when removed 

 from cold storage decomposition proceeded faster than in autumn or 

 winter. The rapidity of decay was inversely proportional to the height 

 of the temperature to which the fruit was subjected. 



The best results were obtained by wrapping the apples, this being 

 especially true when the apples are to be kept for a considerable time, 

 e.g. until June. 



The decay of the apples is due chiefly to the influence of certain 

 moulds ; black rot (Sphceropsis malorum,), bitter rot (Glmosporium 

 fmctigcnum), soft rot (Penicillium glaucum). 



Other changes, those known as " after-ripening " (see Kulisch in 

 Bied. Ccntr. Agriculturchem. 22, 625), in addition to those due to decay, 

 occur, principally the change of starch into sugar and the change of cane 



