COOPERATION, DIFFUSION OF INFORMATION, ETC. 83 



PUBLICATIONS. 



All of the scientific and investigative work done by the Forest Service which 

 results in conclusions of value to the scientific world at large, the owner of 

 timberland. the professional forester, or the woodworking and allied industries 

 is recorded in bulletins and circulars. Publications of the Forest Service avail- 

 able for free distribution may be obtained by addressing the Forester, Forest 

 Service, Washington. D. C. A list of such publications will be sent upon 

 request. 



Publications, the supply of which for free distribution is exhausted, may be 

 purchased from the superintendent of documents, Government Printing Office, 

 Washington, D. C., who will furnish free a list of such publications and their 

 prices. 



MAPS. 



Special maps are issued for the use of Forest officers, or as special publica- 

 tions for the dissemination of information which can be best expressed graphi- 

 cally. Such maps are not for general distribution, though some are sold, and 

 they may even be given away under certain circumstances. A general map of 

 a National Forest may be given to a user when it is necessary or convenient to 

 show thereon the lands covered by a transaction. 



General maps of the United States showing the National Forests and related 

 projects and data, unmounted, are sold by the superintendent of documents, 

 Washington. D. C., at 50 cents each. A limited number of copies are retained 

 in the Forest Service and furnished in some cases to State officers, State insti- 

 tutions, and libraries, where they will be accessible to the general public. 

 General continental or regional maps showing natural forest areas or the dis- 

 tribution of tree species are furnished to State institutions and to some first- 

 class libraries. When more than one copy of a general map is requested, a 

 charge will be made for each extra copy. 



PHOTOGRAPHS. 



The Forest Service has a large collection of photographs showing forest 

 conditions in all parts of the United States. 



The act of March 4, 1907, authorizes the disposal of photographic prints, 

 including bromide enlargements, lantern slides, transparencies, blue prints, and 

 forest maps for educational purposes, at cost and 10 per cent additional. 



Photographic material is also prepared for outside distribution for the follow- 

 ing purposes only: 



(a) To cooperators and others from whom aid has been received or by whom 

 courtesies have been extended in furtherance of official work. 



(6) For use in illustrating material to be published in newspapers or other 

 periodicals. 



(c) For use in book illustrations. 



(d) For use in educational work by lecturers and schools, and for exhibit 

 purposes. 



The object in every case is to promote the work of the Forest Service or to 

 diffuse information concerning forestry. As a rule gifts are restricted to 

 cooperators or persons who have extended aid or courtesies in furtherance of 

 official work; but when a valuable educational result can be attained only if 

 material can be furnished free, gifts may be made. 



When photographic material is to be sold it will be according to the follow- 

 ing schedule of prices: 



PHOTOGRAPHIC PRINTS. 



