236 



JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Some evidence is given of the changes attributed to incomplete 

 acchmatization, but it is hardly of a conclusive nature; and the same 

 may be said of the variations grouped under class c, of which even less 

 evidence is offered. 



Cases are quoted of lack of uniformity in the individual plant, but 

 the greater part of the paper deals with the characteristics of the various 

 hybrids, and the impurity of the strains reported upon render it im- 

 possible to draw any conclusion as to the effect of environment upon 

 them.— A. Bd. 



Cotton, Local Adjustment of Varieties. By 0. F. Cook {U.S.A. 

 Dep. Agr., Bur. PL Ind., Bull. 159, 1909).— A lengthy and detailed 

 account of variation induced by changing of locality in cotton plants. 

 A distinction is drawn between merely local changes and acclimatiza- 

 tion of foreign cottons. The general deterioration of cotton due to 

 local changes is due to an increase of diversity in individual plants. 



The saving of seed from plants which have not been disturbed by 

 the environmental change is advocated. The conclusion drawn from i 

 the facts is that in testing new varieties in new districts time must \ 

 be allowed for local adjustments before any conclusion can be reached 

 as to suitability. 



This is a paper of close and detailed evidence, and its nature renders 

 adequate abstracting difficult, if not impossible. — E. A. Bd. 



Cotton, Suppressed and Intensified Characters in Hybrids 



of. By 0. F. Cook {U.S.A. Dep. Agr., Bur. PI. Ind., Bull. 147, 

 pp. 24). — The author considers that heredity comprises two processes — j 

 viz. transmission and expression of characters. Extra-parental " i 

 characters are divided into three classes — suppressed, intensified, and j 

 primitive. | 



Mechanical theories of heredity are dismissed, as " plants and | 

 animals inherit from their parents and transmit to their descendants I 

 large numbers of peculiarities which are not shown in their own j 

 bodies." Details of two of the classes mentioned above are given. ' 



No. 1. Suppression of bractlets in a cross between two bracteated 

 varieties. 



No. 2. Intensification of bracts in certain crosses. 



These changes are said to be most pronounced in the first genera- 

 tion, and tend to disappear in later generations. 



This paper is of much interest, but the difficulty of sundering | 

 changes due to environment from those due to hybridity is very appa- 

 rent. No evidence is offered of the stability of the varieties used, and ; 

 in view of the author's remark on local diversities in Bull. 159 of this j 

 Bureau, this omission renders the evidence somewhat inconclusive, j 



E. A. Bd. 



Cucumber Beetle, The Striped {Diahrotica vittata Fab.).— By 



F. H. Chittenden, Sc.D. {U.S.A. Dep. Agr., Bur. Entom., Circ. 31; 

 May 1909; 2 figs.). — A revised edition of a previous circular. The 



