508 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



salmon ; ' Mrs. W. Smalley,' pink ; ' Mrs. E. Wild,' carmine ; ' Mrs. A. 

 Wallace,' pink, changing to lavender. — S. E. W. 



Sweet Potato, Dry Rot. By L. L. Harter and E. C. Field 



(Phytopathology, ii. p. 121 ; June 1912 ; figs.). — The dry rot of the 

 sweet potato has been already described and attributed to Phoma 

 batalae ; the authors show that this fungus has another and higher 

 form in Diaporthe batatatis. — F. J. C. 



Tabaschir and the Greek Saccharon. By Dr. Carl Curt 

 Hosseius (Beth. Bot. Cent. Bd. 30, Abt. 2, Heft 1, pp. 88-109). — 

 The author, after a critical study of the question, concludes that 

 tabaschir is the solid siliceous material found within the stems of 

 various Bambuseae. It occurs in commerce either as crude or calcined 

 tabaschir. He holds that Tschirch's Tabaschir I. does not exist, and 

 denies this author's explanation as to its origin. It is used as food 

 in India, not as medicine. Bamboo manna contains no mannite, 

 and should be described as Bamboo sugar. It is probable that 

 Bamboo sugar is produced by external causes, e.g. insect injury. 

 Water is sometimes found in Bamboo stems, which in Siam is due to 

 the soil. The Greek craKx^pov was simply cane sugar and its products, 

 including the officinal sugar-candy. 



The pieces of bamboo in candied sugar were simply used instead 

 of threads during the process of manufacture. — G. F. S. E. 



Timber, Increasing the Durability of (Jour. Bd. Agr. vol. xx. 

 No. 4, pp. 307-310). — The question of the cost of creosoted as com- 

 pared with that of untreated timber, and the relative value of the 

 process in its application to timber of various kinds, is dealt with. 



A. S. 



Tobacco, British-grown. By R. Ellis (Jour. Bd. Agr. vol. xix. 

 No. 11, pp. 904-908). — A brief history of tobacco-growing in Britain 

 from its first introduction until the autumn of 1912. — A. S. 



Tobacco, Cultivation of, for Preparation of Fruit and Hop 

 Washes (Jour. Bd. Agr. vol. xix. No. 12, pp. 985-994). — A compila- 

 tion of general information for the guidance of any growers who may 

 contemplate the growth of tobacco, with a view to the preparation 

 of fruit or hop washes for their own gardens or orchards. The recom- 

 mendations made are largely based on the results obtained in 

 experiments conducted at Wye College, in Kent, during the seasons 

 1910-1911. — A. S. 



Tobacco, Culture of, in Ohio (U.S.A. Agr. Exp. Sin., Ohio, 

 Bull. 238 ; March 1912 ; plates). — An account of the tobacco crop in 

 Ohio, with tables and shaded maps showing the comparative quanti- 

 ties of the different types of tobacco grown in different districts in 

 the State. 



The various cultural and curing methods in use in the different 



