56 THE NATIONAL FOREST MANUAL. 



Index maps, proclamation diagrams, and diagrammatic maps are treated as 

 publications of the Department of Agriculture, and may be used to answer 

 inquiries which could not be answered satisfactorily in any other manner. 



In exceptional cases, as in return for services or courtesies rendered, when 

 a request is made that a map be given to an individual or to an institution not 

 included in those listed, the reason for such a gift should be clearly stated 

 in the request, and should be indorsed or initialed by a Forest officer before 

 being forwarded to the Forester. 



Maps Issued by Other Departments. 



Proclamations creating or changing National Forests, with diagrams, are 

 issued by the State Department. A limited supply for distribution is kept in 

 the Washington office. 



Published quadrangles, showing topography, drainage, and cultivation, are 

 issued by the Geological Survey. Only district foresters may write directly 

 to the Survey for its publications, stating in each letter that the publications 

 requested are strictly for official use. 



When advance topographic sheets are prepared in the Geological Survey for 

 an area affecting any National Forest, 12 photographic or 40 lithographic copies 

 are delivered to the Forester. One copy is placed in the Forest Atlas, at Wash- 

 ington, and copies will be sent to the District Forester, and to the supervisor 

 of the Forest affected. 



Township Plats. 



Township plats are prepared in the General Land Office. Some of them 

 have been reproduced by photolithography, but the greater number are repro- 

 duced by photography in the Office of Geography, the original plats being bor- 

 rowed for that purpose, in accordance with a cooperative agreement between 

 the Forester and the Commissioner. A wet -plate negative is made and three 

 prints are taken from it, which, after being mounted, trimmed, and punched, 

 in accordance with Atlas standards, are placed in the Forest Atlas at Wash- 

 ington, in the District Atlas, and in the office of the supervisor. The negative 

 is then destroyed; additional prints, therefore, can not be furnished, unless 

 they have been specifically requested before the negative is made. Requests 

 for township plats should always be sent to the Forester and should specify 

 the date of the plat, as there are frequently several surveys and plats for a single 

 township. 



State maps are issued by the General Land Office. Requests for them should 

 be sent to the Forester. 



Charts are issued by the Coast and Geodetic Survey. Requests for them 

 should be sent to the Forester. 



PHOTOGRAPHS. 



Photograph Laboratory, Washington. 



The Office of Geography at Washington is equipped for all classes of photo- 

 graphic work, including wet and dry plates, pictures and itfap prints, blue 

 prints, Vandykes, enlarged transparencies and bromides, and lantern slides. 

 In cooperation with the Geological Survey, it prepares and prints photomicro- 

 graphs of wood sections. It prepares originals for illustrations, photographs 

 and wash drawings for halftones, and line drawings for zinc etchings; it makes 

 transfers from map negatives to stone for lithographic proofs; it mounts 

 pictures and maps on cards or muslin. 



Requisitions for Photographic Work. 



Requisitions (Form 988) on the photographer at Washington for photo- 

 graphs, maps, diagrams, or other graphic records needed for office use in con- 

 nection with files and records, other than supervisors' albums or to accompany 

 reports, may be initialed by the chief of any branch or office, in Washington or 

 in the districts; and if not more than three prints of any one negative are in- 

 volved supervisors may make requisition directly upon Washington. When 

 correspondence of a purely routine character is necessary with regard to filling 

 such requisitions, the Branch of Operation may correspond directly with 

 supervisors, without sending copies of the correspondence to the district office. 



Supervisors may also requisition directly single copies of maps or diagrams 

 to be placed on the walls of their offices. Requisitions for bromides or trans- 

 parencies desired for instructive display, whether in offices of supervisors or in 

 the district offices, will be initialed by the District Forester, as will all requisi- 



