BOTANY. 613 



Hybridization in the United States, L. H. Bailey; On self-sterility, F. Ludwig; 

 Crossings made at the Natural History Museum of Paris from 1887 to 1897, L. Henry; 

 Can hybrids be obtained by grafting? E. Juan; Observations on some hybrids 

 between Drosera Jiliformis and D. intermedia, J. M. Macfarlane; Eucalyptus hybrids 

 in the Mediterranean region, Trabut; On the particular influence of each parent in 

 hybrids, L. Wittmack; Principles of hybridizing holding good in the majority of 

 cases, M. Leichtlin; Breeding suitable food plants, W. M. Hays; On the use of trans- 

 parent parchment paper boxes for artificial fertilization, H. de Vries; Hybrid Cine- 

 rarias, R. I. Linch; Creation of an important variety of Crocus mfivus, Attempted 

 hybridization of Dioscorea, and Notes on a hybrid of Mirabilis, P. Chappellier; A 

 few notes on reproduction in hardy plants by means of hybridizing species and 

 crossing varieties, C. Stuart; Fern crossing and hybridizing, C. T. Druery; Hybrid 

 ferns, H. B. May; Hybrids between the common lilac and the laciniated Persian 

 lilac, E. Lemoine; Hybrid clematis, A. G. Jackman; On the crossing of Anthurium 

 scherzeriununt, Bromeliads obtained by hybridization, and Gloxinias and their artifi- 

 cial fertilization, M. Duval; Notes on Hybrids, T. Meehan; Chrysanthemums, H. 

 Weeks; On the cross fertilization of the fuchsia, J. Lye; and Notes on some hybrids, 

 AV. Smythe. 



Changes resulting from etiolation, G. Andre ( Compt. Rend. Acad. 

 ScL Far Is, 130 {1900), M. 18, 2)p. 1198-1201; ahs. in Jour. Roy. 

 Micros. Soc. {Londoti], 1900, No. J^, p)- 4^9). — According to the author, 

 the etiolation of maize and lupines is not identical. In each case the 

 total amount of carbon is reduced by about one-half, while the pro- 

 portion of nitrogen remains about the same. The amount of asparagin 

 in the lupine is much larger than that of the maize, the latter plant 

 having apparently used up a portion of the asparagin for the pro- 

 duction of new albuminoids. Silica in maize is 30 times more abun- 

 dant in the etiolated plant than in the seed, and 15 times more than 

 in the lupine. The relative amount of lime is the reverse in the 2 

 plants when etiolated. In the case of maize etiolated plants contain 

 more potassium than the seed, while in the lupine this is not the case. 

 The amount of phosphoric acid is said to be more abundant in 

 etiolated plants than in others. 



Some injurious effects produced by fumigation -with hydro- 

 cyanic-acid gas, W. R. Beattie {Florists' Fechange, 12 {1900), Xo. 

 29, p. 709). — Attention is called to the fact that under certain condi- 

 tions it is possible to do serious damage to plants when fumigated with 

 hydrocyanic-acid gas. A house devoted to a general collection of 

 plants was fumigated with one-tenth gram of 98 per cent potassium 

 cyanid per cubic foot of space. The gas was allowed to remain in 

 the house for 20 minutes. All the usual precautions were taken, but 

 many of the plants began to show effects of burning after 36 hours. 

 The damage is attributed to a number of causes. The house was 

 new and tighter than the average greenhouse, and, being unshaded, 

 the sun had produced a vigorous gix)wth of the plants, which were 

 easih" injured. The effect of the gas was most noticeable on tomato 

 plants, cardoons, grape cuttings, sweet peas, and Kenilworth ivy. 



