620 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Coreopsis verticillata as its alternate host. Damage due to wind, to ice 

 and snow, and to cultivation in unsuitable soils is also referred to. 



The second paper deals with attacks upon the Spruces Picea A hies 

 and P. rubens, and the Hemlocks Tsuga canadensis and T. caroliniana. 

 Secdhng blight of the former due to Ascochyta piniperda, Sclerotinia 

 Fuckeliana, and Phoma sp. ; twig bhght due to a species of Pesta- 

 lozzia similar in its effects to P. funerea, and to Phoma piceana ; heart- 

 rot due to Trametes Pini, and frost injury, are all dealt with. On the 

 latter the following attacks appear to be the most important : timber- 

 rot due to Fomes pinicola ; leaf-rust to Pucciniastrum Myrtilli, which 

 is said to have an Ericaceous plant as its alternate host ; tv/ig blight 

 to a species of Rosellinia. — F. J. C. 



Electrical Discharge, The Distribution of Overhead, Employed 

 in recent Agricultural Experiments. By I. J0rgensen and J. F. 

 Priestley (Jour, Agr. Set. vi. pp. 337-348 ; September 1914). — The 

 authors show that the incidence of the electrical discharge is by no 

 means confined to the ground beneath the wires, but is distributed 

 also in varying degrees, according to conditions which are continuaUy 

 altering, to the adjacent areas. Adjacent areas have usually acted 

 as control areas, and the results obtained are therefore misleading. 

 Methods of overcoming this difficulty are discussed. — F. J. C. 



Epidendrum polybulbon var. luteo-aibum. By E. Miethe 

 [Orchis, vol. viii. pp. 33, 34 ; i plate). — This orchid is of easy cultiva- 

 tion and free growth. In January it is covered with 'flowers, which 

 remain open for a month. The flower segments are pale yellow, with 

 a trace of brown at the base and the labellum is v/hite. The plant 

 is a native of Mexico and the West Indies. It thrives in a temperate 

 house, in a well-lighted situation, and likes moisture. — S. E. W. 



Erodium and Pelargonium, A Bacterial Disease of. By J. M. 



Lewis (Phytopathology, iv. pp. 221-232; August 1914 ; pi.). — 

 Spots are produced on leaves of Pelargonium, at first minute and 

 pellucid, enlarging with age, becoming reddish-brown in centre, with a 

 colourless border, the dead tissue later becoming dry. On Erodium 

 texanum the young spots are reddish-brown, but become black and 

 somewhat watery in appearance. A bacterium has been isolated, 

 studied, and named Bacterium (Pseudomonas) Erodii. It was found 

 to produce typical spots on a large number of varieties of Pelargonium, 

 but not upon other plants in which inoculations were tried. — F. J. C. 



Fire Blight, Importance of Tarnished Plant Bug in the Dis- 

 semination of. By V. B. Stewart (Phytopathology, iii. pp. 273-276 ; 

 Dec. 1913 ; fig.). — The author shows that Lygus pratensis is an 

 active agent in carrying the bacillus of fire blight from tree to tree in 

 nurseries. — F, J. C. 



Fish Manure, Fish Meal and (Jour. Bd. Agr. vol. xxi. No. 7, 

 pp. 688-694). — About half the article is devoted to fish manure, 



