NOTES AND ABSTRACTS. 



319 



Strawberries for New Hampshire. By H. F. Hall (U.S.A. 

 Agr. Exp. Sta.,New Hampshire, Bull. 137 ; May 1908). — A careful study 

 of strawberry cultivation both for pleasure and profit has been made by 

 the author, who has thoroughly dealt with the preparation of soil, plant- 

 ing, general cultivation, irrigation with overhead pipes, placed both high 

 and low, arranged on the Skinner system, cost of production, yield and 

 profit per acre, followed by a description of New Hampshire varieties, and 

 a general summary of the work. — E. F. H. 



Tropaeolums, Variegated. By G. T. Grignan (Rev. Hort., March 

 16, 1909, p. 132 ; coloured plate). — The plate represents a very prettily 

 variegated type with brilliant scarlet flowers named ' Reine Wilhelmine,' 

 which comes true from seed. — C. T. D. 



Tuberous Begonia Improvements. By Eugene Vallerand 

 (Rev. Hort., August 1, 1909, pp. 359-362; 1 fig).— An interesting 

 account of the development of the tuberous Begonias by hybridization 

 and selection, and of the particular sports which have been developed 

 into distinct sections; double, crested, spotted, frilled, &c. — C. T. D. 



Tulips, A New Race of Multiflorous. By A. Mottet (Rev. Hort., 

 August 16, 1909, pp. 382-384 ; 1 fig). — The illustration represents 

 ' Monsieur S. Mottet,' in which the stalk branches and bears several 

 flowers. Fertile and breeds truly. Flower creamy white, sometimes striped 

 or margined with red, petals very pointed, size medium. Bulb produces 

 three to five flowers, according to vigour, by fasciation. By using this 

 as parent a number of other multiflorous varieties have been obtained. 



C. T. D. 



Ultra-violet Rays and Plant Life. By J. Schulze (Belli. Bot. 



Centralbl. vol. xxv. Abth. 1, Heft 1, pp. 30-80; August 1909; 2 plates). 

 — Those rays of light which base a wave length of 280 micromillimetres 

 are found by Schulze to retard the streaming of protoplasm, the 

 germination of spores, the growth of fungus hypha? and the processes 

 of cell division. These rays are fatal to bacteria and also to all 

 protoplasm even with only a moderate exposure. They cannot pass 

 through wood, cork, or the cuticle. — G. F. S.-E. 



Variation in the Daisy, Notes on Numerical. By C. H. 



Danforth (Bot. Gaz. vol. xlvi. pp. 349-356 ; November 1908).— The author 

 discusses the results of the observation of 140,988 ray florets in 5,585 

 heads from five different localities in America. There are, as in Germany, 

 modes on 21 and 34, but none on 8 and 13. This may be because the 

 American plant is Chrysanthemum leucanthemum var. pinnatijidum 

 Lecoq and Lamotte, which is not the common German plant. The 

 author found that the mode 34 was predominant between May 27 

 and June 14. But from July 3-15 the mode on 21 was commonest. 



He also found that along the same roadside the rays were more 

 numerous on the north side than on the south. Hence he considers 

 the number of ray florets to be largely an effect of nutrition. 



