3l6 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



its value should be calculated from its cost, and not from the market 

 price. The argument in favour of using market prices instead of 

 cost in the determination is, of course, that thereby a comparison can 

 be made of the relative advantages of selling and consuming home- 

 grown produce. But so long as the cost of production is determined 

 this comparison can be made without introducing fictitious values into 

 the accounts. — A. S. 



Cotoneaster turbinata {Bot. Mag. tab. 8546).— China. Nat. Ord. 

 Rosaceae, Tribe Pomeae. Shrub, 6 feet high. Leaves ovate-lanceolate, 

 1} inch long. Inflorescence many-flowered. Flowers J inch across, 

 white, anthers purple. Fruit, 2 inches long, crimson. — G. H. 



Cotton, Abortion of Fruiting Branclies, By 0. F. Cook {U.S.A. 

 Dep. Agr., Bull. 118, pp. 11-16). — The cotton plant bears its fruit 

 on specialized fruiting branches, not on the main stalks and upright 

 vegetative branches. When there are too m.any upright shoots 

 the horizontal fruiting branches cannot develop normally and are 

 buried in shade. Many of the young bolls fall off, and the remainder 

 are undersized and open prematurely. The conditions that favour 

 luxuriant growth of the vegetative branches are inimical to the 

 development of the fruiting branches. — S, E. W. 



Cotton, Self-pollination. By R. M. Meade {U.S.A. Dep. Agr., 

 Bull. 121, 1913, pp. 29-30 ; I fig.). — To prevent cross-pollination 

 in cotton, the buds may be covered with paper bags for a few days, 

 or they may be prevented from opening by {a) a spiral of fine 

 copper wire ; {b) sl rubber band ; or (c) an ordinary paper clip bent 

 in the shape of the letter W. The clip holds the petals lengthwise 

 and allows the buds to expand, but not to open. — S. E. W. 



Cranberry Cultivation. By H. J. Franklin {U.S.A. Exp. Stn., 

 Mass., Ann. Rep. 1912, p. 209, Jan. 1913). — An account of the 

 conditions of growth and results of an experimental cranberry plot is 

 given. — F. J. C. 



Currant-cane Mecrosis, An Experiment on the Control by 

 Summer Pruning. By F. C. Stewart {U.S.A. Exp. Stn., Geneva, N.Y., 

 Bull. 357). — Necrosis of currant canes caused by the fungus Botryo- 

 sphaeria ribis is characterized by the sudden wilting and dying of 

 canes here and there. Short sections, 1-4 inches, of the bark and wood 

 are attacked, discoloured, and killed, thereby causing the death of all 

 parts above the point of infection. 



• The fungus was described by Duggar in 191 1. 



The wood and pith are filled with the mycelium of the fungus, 

 and consequently the water supply to the cane above the injury is 

 stopped. With a lens a fine whitish cobwebby mycelium can be 

 observed in the discoloured pith. 



Experiments were carried out to see if summer pruning of all 

 diseased canes would control the disease, but the results were decidedly 

 negative. — D. M. C. 



