230 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Cabbage, The Decay .of, in Storag-e : its Cause and Ppeven- 



tion. By L. L. Barter {U.S.A. Dep. Agr., Bur. PL Ind., Circ. 39; 

 Oct. 1909). — The loss from decay of cabbage in winter storage has 

 increased to such an extent in some districts in the past few years as 

 frequently to make the growing of the crop an almost unprofitable 

 industry. Of the thousands of tons stored every fall to supply the 

 markets in winter from 10 to 50 per cent, is lost annually from decay. 



Soft rot and leaf-blight are found to be the immediate cause of the 

 trouble. The organisms that promote these decays gain access to the 

 tissues of the leaves through wounds made by careless handling, and 

 also by following up the fibro-vascular bundles which have been 

 previously killed by black-rot iri the field. 



The author advises that diseased or badly-bruised cabbage should 

 not be stored, and attention should be paid to the ventilation of storage- 

 houses, which should be kept as dry as possible. 



If a house has been previously used for storage purposes, and there 

 has been any evidence of decay, spraying the interior with about half 

 1 per cent, solution of copper sulphate or the application of whitewash 

 will destroy the spores of many fungi and bacteria. The application of 

 either should be made long enough before the house is used for storage 

 to permit the wood to dry thoroughly. — V. G. J. 



Calcium v. Magnesium and Sodium {Bot. Gaz. vol. xhx. 

 pp. 41-50, January 1910; with 2 figs.). — Mr. Ghas. B. Lipman finds 

 that there is no antagonism between either magnesium or sodium and ' 

 calcium. Any combination of the first and last is more toxic than 

 MgOL for B. suhtilis. Similarly, any combination of sodium and 

 calcium is more poisonous for this bacillus than NaCl alone. In this 

 respect B. suhtilis differs from all other plants hitherto studied. 



G. F. S.-E. 



Camassia Leichtlini. By W. Fitzherbert {Garden, Sept. 11, 

 1909, p. 4:4:6 and fig.)- — This is particularly recommended for the wild 

 garden. Two varieties are mentioned. The writer also describes 

 C. esculenta, G. Cussickii, G. Fraseri, G. montana, and C. Brownii; he 

 considers they should be planted in colonies. They do not produce many 

 offsets, but may be raised by the thousand from seed, flowering in their 

 fourth or fifth year. — H. R. B. 



Cambium Starvation in Trees. By K. Eubner {Nat. Zeit. 

 Land-Forst. viii. pp. 212-262; April 1910). — Many variations in i 

 external form of trees may be traced to low activity of the cambium 

 layer which forms new wood and inner bark. A number of cases have 

 been investigated by the author, and he has succeeded in grouping them 

 into series. The ribbing of the stem so conspicuous in trees like ^ 

 Hornbeam and Yew is traced to poor growth of parts of tha cambium, 

 while neighbouring parts grow vigorously; the year-ring is thus un- 

 equally developed. In other cases ribbing may be due to excessive 

 bark formation. When the growth of the whole cambium ring is j 



