438 EXPERIMENT STATION RECORD, 



During the latter part of November lilac branches were succesfully forced out 

 by attaching pipettes containing a small quantity of radium chlorid to the ter- 

 minal buds. The forcing effect was irregular, however, since the individual buds 

 were situated at different distances from the radiating area. Lilac branches 

 exposed to radium emanation for periods of 20, 48, and 72 hours were success- 

 fully forced, the longer exposure giving the quicker results. Similar results 

 were secured with chestnut branches, except that exposure to emanation for a 

 day appeared to be sufficient. Tests were also made with branches of a number 

 of other trees. The tulip, bladdernut, and maple were successfully forced, 

 whereas the ginkgo, sycamore, red beech, and linden gave negative results. The 

 experiments indicate that radium emanation will only stimulate growth during 

 that part of the rest period between the middle of November and the end of 

 December. 



New garden plants of the year 1911 {Roy. Bot. Gard. Kew, Bui. Misc. 

 Inform., 1912, Apj). 3, pp. 39-6 Jf). — A list is given of garden plants described in 

 botanical and horticultural publications during 1911. It comprises all the new 

 introductions recorded, t(;>gether with the most noteworthy of those which have 

 been reintroduced after being lost from cultivation. 



Report of the division of horticulture of the Central Agricultural Station 

 for the year 1911, M. Calvino (Estac. Agr. Cent. [Mexico^ Bol. 66, 1912, pp. 

 82, pis. 74)- — This comprises a report of varietal, climatal, and cultural experi- 

 ments with forage crops, fruits, rubber trees, vegetables, ornamentals, and 

 cereals conducted at the Central Agricultural Station. 



Home gardening in South Carolina, C C Newman {South Carolina Sta. 

 Bui. 166, pp. 3-.'i8, figs. 6). — A popular treatise presenting general considerations 

 relative to soil and plant classification, how plants feed and grow, crop rotation, 

 cultivation, fertilizers, hotbeds and cold frames, and giving specific directions 

 for the culture of the important vegetables. Directions are given for controlling 

 the more troublesome insects and fungus diseases, together with planting tables 

 and varieties of vegetables recommended for the home garden in South Carolina. 



Growing Denia onion seed, F. GarcIa {Neio Mexico Sta. Bui. 82, pp. 27, 

 figs. 8). — In a previous bulletin (E. S. R.. 22, p. 732) it was shown that the 

 Spanish or Denia onion is well adapted for culture in certain parts of New 

 Mexico. 



Successful experiments in the production of a home supply of Denia onion 

 seed are here reported. The seed was produced at the rate of 525 lbs. per acre 

 in 1910 and 430 lbs. per acre in 1911. The germination tests showed 89 per cent 

 and 81 per cent for the 2 years, respectively. The onions raised from the home- 

 grown seed compare favorably with those from imported seed. 



Impediments to the vegetable industry and their control, J. Kindshoveim 

 {Flugschr. Deut. Landw. GeseU., 1912, No. 13, pp. 26). — This comprises a popu- 

 lar treatise on the control of plant diseases, animal pests, and other drawbacks 

 to successful vegetable growing. 



Pomology {9. Cong. Internat. Agr. Madrid, 1911, pp. 639-715). — This com- 

 prises reports of papers presented and discussed in the pomological section of 

 the Ninth International Congress of Agriculture, Madrid, in 1911, as follows: 

 The Culture of Oranges. Olives, and Other Important Fruit Trees, by J. M. P. 

 Jaramillo; a report on the same theme, by Janini ; Suggestive Improvements in 

 the Culture of Olives and the Manufacture of Olive Oil, by J. Chapelle; Methods 

 of Defense against the Parasites and Principal Diseases of Fruit Trees, by L. 

 Navarro; reports on the same theme, by L. Salas Amat and R. Janini: Recent 

 Progress in the United States against Insects Destructive to Oranges, by C. L. 

 Marlatt ; and The Ink Disease in Chestnut Groves at Ardeche, by J. Farcy. 



