PUBLIC LAWS-OH. 516-JULY 22, 1942 National Arbore- tum. 44 Stat. 1422. 42 Stat. 1488; post, p. 733. 5U.S. . §§ 661- 674; Supp. I, ch. 13 . Total; personalserv- ices. Experiments and in- vestigations on for- estry, etc. National Arboretum: For the maintenance and development of the National Arboretum established under the provisions of the Act entitled "An Act authorizing the Secretary of Agriculture to estab- lish a National Arboretum, and for other purposes", approved March 4, 1927 (20 U. S . C . 191-194), erection of buildings, employment of persons and means in the city of Washington and elsewhere, and travel expenses of employees and advisory council, $54,892, of which such amounts as may be necessary may be expended by contract or otherwise for the services of consulting landscape architects without reference to the Classification Act of 1923, as amended, or civil- service rules. Plant exploration, introduction, and surveys: For investigations in seed and plant introduction, including the study, collection, purchase, testing, propagation, and distribution of rare and valuable seeds, bulbs, trees, shrubs, vines, cuttings, and plants from foreign countries and from our possessions, and also wild native plants, for experiments with reference to their introduction and cultivation in this country, for plant-disease investigations, including nematology, and for plant and plant-disease collections and surveys, $301,403. Soil and fertilizer investigations: For soil and fertilizer investiga- tions, including soil minerals, soil organic matter, soil solution, soil physical and chemical investigations, soil microbiology, including the testing of cultures procured in the open market for inoculating legumes, other crops, or soil and if any such samples are found to be impure, nonviable, or misbranded, the results of the tests may be published, together with the names of the manufacturers and of the persons by whom the cultures were offered for sale; for investigations of the causes of soil infertility and the maintenance of soil produc- tivity; and for investigations within the United States of fertilizers, fertilizer ingredients, including phosphoric acid and potash, and other soil amendments, and their suitability for agricultural use, $338,931. Soil survey: For the investigation of soils and their origin, for survey of the extent of classes and types, and for indicating upon maps and plats, by coloring or otherwise, the results of such investi- gations and surveys, $205,430. Sugar-plant investigations: For sugar-plant investigations, includ- ing studies of diseases and the improvement of sugar beets and sugar- beet seed, sugarcane, and other sugar-producing plants, cultural and production methods, and the improvement and maintenance of soil fertility in relation to sugar plants, $371,225. Tobacco investigations: For the investigation and improvement of tobacco and the methods of tobacco production and handling, $126,950. Total, salaries and expenses, Bureau of Plant Industry, $5,192,197 of which amount not to exceed $1,133,110 may be expended for depart- mental personal services in the District of Columbia. FOREST SERVICE SALARIES AND EXPENSES For the employment of persons and means in the District of Columbia and elsewhere to enable the Secretary of Agriculture to experiment and to make and continue investigations and report on forestry, national forests, forest fires, and lumbering, but no part of this appropriation shall be used for any experiment or test made out- side the jurisdiction of the United States; to advise the owners of woodlands as to the proper care of the same; to investigate and test American timber and timber trees and their uses, and methods for the preservative treatment of timber; to seek, through investigations and the planting of native and foreign species, suitable trees for the tree- 678 [56 STAT.
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