PUBLIC LAWS-CH. 280 -JUNE 29, 1949 maintenance of all other improvements necessary for the proper and economical administration, protection, development, and use of the national forests, including experimental areas under Forest Service Direct prchases. administration, except that where direct purchases will be more eco- nomical than construction, improvements may be purchased; the con- struction (not to exceed $15,000 for any one structure), equipment, and maintenance of sanitary and recreational facilities; timber cul- tural operations; development and application of fish and game man- agement plans; propagation and transplanting of plants suitable for planting on semiarid portions of the national forests; estimating and appraising of timber and other resources and development and appli- Homestead lands, cation of plans for their effective management, sale, and use; exami- nation, classification, surveying, and appraisal of land incident to effecting exchanges authorized by law and of lands within the bound- aries of the national forests that may be opened to homestead settle- ment and entry under the Act of June 11, 1906, and the Act of August 34Stat.233;37Stat. 10, 1912 (16 U. S. C. 506-509), as provided by the Act of March 4, 1913 (16 U.S . C. 512); investigation and establishment of water rights, including the purchase thereof or of lands or interests in lands or rights-of-way for use and protection of water rights necessary or beneficial in connection with the administration and public use of the national forests; and all expenses necessary for the use, main- tenance, improvement, protection, and general administration of the national forests, $26,300,000, of which not to exceed $25,000 shall be available for the purchase of one nursery site, and the limit of cost for not to exceed one building constructed at Horseshoe Organization Telephone lines. Camp, West Virginia, shall be $22,500: Provided,That appropriations for the Forest Service shall be available hereafter for the correction of inductive interference on Forest Service telephone lines caused by transmission lines constructed by organizations financed by loans from the Rural Electrification Administration. Fighting forest fires: For fighting and preventing forest fires on or threatening lands under Forest Service administration, including lands under contract for purchase or in process of condemnation for Forest Service purposes, $100,000, which amount shall also be avail- able for meeting obligations of the preceding fiscal year. Forest research: For forest research in accordance with the provi- sions of sections 1, 2. 7, 8, 9, and 10 of the Act approved May 22, 1928, 45 Stat. 699-702. as amended (16 U. S . C . 581, 581a, 581f-581i), including the construc- Ant.271. tion and maintenance of improvements, as follows: Forest and range management investigations: Fire, silvicultral, watershed, shelterbelts, and other forest investigations and experi- I6UT. C .c. 581a. ments under said section 2, as amended, and investigations and experi- ments to develop improved methods of management of forest and 16 U S.c. §68f. other ranges under section 7, at forest or range experiment stations or elsewhere, $2,818,500. Forest products: Experiments, investigations, and tests of forest 16 U.8. .58 1g. products under section 8, at the Forest Products Laboratory, or elsewhere, $1,172,000. Forest resources investigations: A comprehensive forest survey 16U.S.C.§581 h, under section 9, and investigations in forest economics under section Ante, p. 271 . 10, $866,000. FOREST DEVELOPMENT ROADS AND TRAILS For expenses necessary for carrying out the provisions of section 23 of the Federal Highway Act approved November 9, 1921, as S42tat.218; 49 Stat. amended (23 U. S . C. 23, 23a), relating to forest development roads Experimental areas. and trails, including the construction, reconstruction, and maintenance of roads and trails on experimental areas under Forest Service admin- istration, $10,348,000, which sum is authorized to be appropriated by 338 [63 STAT.