380 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



PROPAGATION OF EUCALYPTUS. 



According to Mr. Stanford, the best method of propagating 

 the Eucalyptus globulus, or Bhie Gum, the Australian tree 

 which has become so noted for its health-imparting qualities, 

 is by forcing the seed in a hot-house, and, when started, plant- 

 ing in a sheltered position. For the first three years the 

 trees must be placed under cover in winter, and the fourth 

 and fifth years they should be protected for several feet from 

 the ground by wisps of straw. When the trees are kept in- 

 doors in winter, it should be in a high greenhouse, with 

 plenty of light and little water. Mr. Stanford has now in 

 his park growing seedlings five years old and thirty feet in 

 height. 20 A, November 22, 594. 



COMPOSITION OF WRITHE RED LEAVES. 



A comparison and analysis, by Professor Krauss, of difier- 

 ent species of leaves falling under the efiect of summer 

 drought with those cast in the fall, showed that, with about 

 the same amount of starch and potash, the former are richer 

 in albuminous matter and phosi3horic acid, and their fall con- 

 sequently occasions a loss to the plant; furthermore, since 

 starch and potash generally accompany each other, he infers 

 that the starch has not been lost by conversion into carbonic 

 acid in the diseased leaves, but has passed back into the 

 plant with the jDotash. It seems also that the starch and 

 albuminous matter are not intimately combined in their cir- 

 culation, since the latter, together with phosphoric acid, are 

 left behind in the dried leaf. It also ajDpears that starch and 

 potash are the more mobile elements. 19 C\ August 30, 1873, 

 328. 



