216 



commenced at three years. At five years old, if not pruned, the 

 trees attain a height of about twenty feet and a spread of about 

 ten feet. 



The cuUivation of camphor is napw engaging the attention of the 

 Secretary of Agriculture. There is little doubt that the next ten 

 years will see this industry well established on a profitable basis 

 in many countries. At present great difficulty is experienced 

 in procuring seed, as the Japanese are guarding the industry 

 very jealously. It is said, however, that the plant grows well 

 from cuttings, and as there are a few trees already established 

 in Hawaii, and generally thriving well, there may be a pos- 

 sibility of procuring sufficient seeds and cuttings locally. The 

 whole question of the successful cultivation of camphor has 

 vet to be answ'ered, but to anyone possessing land in Hawaii not 

 suited to rubber, tobacco, sisal or citrus fruits, or holding more 

 land than they care to put under the above crops, my advice 

 is emphatically, to experiment in camphor. 



NEW PUBLICATIONS. 

 farmers' eulletixs. 



The following recent Farmers' Bulletins may be obtained 

 free from the Secretary of Agriculture, Washington, D. C. : 



Bulletin 276. Experiment Station Work. XXXIX. Pp. 32, 

 figs. 2. Contents: Improvements in peach growing — ^Mulberries 

 — Alfalfa in the Eastern States — Oat culture in the South — Im- 

 provement of grass land — Succotash as a soiling crop — Tankage 

 and bone meal for hogs — Grinding corn for hogs — Dips as hce 

 killers — Digestibility of fish and poultry — Honey vinegar — The 

 farm wood lot. 



Bulletin 277. The Use of Alcohol and Gasoline in Farm En- 

 gines. By Charles Edward Lucke, Assistant Professor of 

 Mechanical Engineering, Columi:)ia University, and S. M. Wood- 

 ward, Irrigation Engineer, Office of Experiment Stations. Pp. 

 40, figs. 12. This Bulletin deals wdth the cost and thermal effi- 

 ciency of diff'erent fuels ; the need of power for pumping purposes 

 in irrigated districts; the use of gasoline engines on irrigated 

 farms, and their adaptability to the use of alcohol, with a report 

 of practical experience with alcohol engines in Germany. 



Bulletin 278. Leguminous Crops for Green ^Manuring. By 

 C. V. Piper, Agrostologist in Charge of Forage Crop Investigi- 

 tions. Bureau of Plant Industry. Pp. 29, figs. 14. 



Bulletin 280. A Profitable Tenant Dairy Farm. By Lyman 

 Carrier, Scientific Assistant, Farm Management Investigations, 

 Bureau of Plant Industry. Pp. 16, figs. 3. 



Bulletin 288. The Nonsaccharine Sorghums. By C. W. War- 

 burton, Assistant Agriculturist, Farm ^Management Investigations, 

 Bureau of Plant Industry. Pp. 30, figs. 9. 



