474 Appendix 



tins, known as Professional Papers, is issued, which contain discussions 

 of the work of a professional or semi-professional nature, dealing with 

 crops, animals, and similar matter, which, though sometimes handled 

 in a popular way, may be presented in a professional or technical form. 

 These are generally of octavo size, illustrated by plates or text figures 

 or both, and are generally printed without cover, title page, table of 

 contents, or index, and are issued in editions of 2500 to several thousand, 

 according to the subject, the nature of the demand, and the need for 

 wide distribution of the information. Copies of these bulletins are 

 distributed free to all who apply for them, as long as the supply lasts. 

 When no copies are available, applicants are referred to the Superin- 

 tendent of Documents, Government Printing Office, who has them for 

 sale at a nominal price, in accordance with the provisions of law. 

 Serial Publications : 



This series comprises (a) The Journal of Agricultural Research, in 

 which are included scientific and technical articles giving the results of 

 investigations of scientific experiments by the DepartmeDt. The 

 Journal is published weekly, and is distributed free only to agricultural 

 colleges, technical schools, experiment station libraries, State universi- 

 ties, Government depositories, and to such institutions as make suit- 

 able exchanges with the Department. Further distribution is by pur- 

 chase from the Superintendent of Documents, Government Printing 

 Office, the subscription price being $3.00 a year. The Journal is royal 

 octavo in size, and varies from 20 to 48 pages. (6) Experiment Station 

 Record. Published monthly and contains abstracts and comments on 

 the scientific work bearing on agriculture issued by the agricultural 

 experiment stations and other institutions. It is distributed free to 

 persons engaged in scientific investigations of agricultural subjects, 

 libraries of experiment stations, agricultural colleges, and collaborators 

 and cooperators with a Department. Miscellaneous applicants may 

 procure it by purchase from the Superintendent of Documents, the 

 subscription price being $1.00 a volume, two volumes being issued a 

 year, or 15 cents per single copy, (c) The Monthly Crop Report, 

 issued according to law. It contains statistics with regard to condi- 

 tion, production, and yield of crops, and the production and value of 

 farm animals. It is quarto in size, contains 8 to 12 pages, and is sent 

 to all who are interested, (d) The Weekly News Letter. A weekly 

 publication consisting of from 4 to 8 pages. Published for the informa- 

 tion of the employees of the Department, and sent to correspondents 

 of the Department. It can be purchased from the Superintendent of 

 Documents, who has it for sale at 50 cents a year, (e) The Monthly 

 List of Publications. A four-page leaflet, issued after the first of each 



