The methods of forest telephone eC'riotraeision' describVd in this manual have been 

 adopted almost without change from the " Instructions for Forest Officers " as issued 

 by the United States Forest Service, Department of Agriculture, in its publication 

 entitled " Telephone Construction and Maintenance OTI the National Forests." With 

 the permission of the Forest Service a considerable portion of these instructions has 

 been reprinted herein and forms the bulk of Chapters VII, VIII, IX, XI, XII, and 

 XVI, as well as parts of other chapters. Most of the diagrams illustrating telephone 

 construction methods are also reproduced from the same publication. A few were 

 adapted from a special circular of instructions prepared by the District Forester, 

 District 5, United States Forest 'Service and certain material in the text was secured 

 from the same circular. 



Other important publications from which material has been derived are the 

 following: "Systematic Fire Protection in the California Forests," Dubois; "Fire 

 Protection in District 1," Silcox; "Manual of Visual Signalling," United States 

 Signal Corps; " Trailing Manual Signalling 1915," British War Office. 



In only a few cases, however, has it been possible to quote. In addition, a large 

 number of works on special phases of the subject have been consulted and these are 

 for the most part included in Appendix B. 



Persoiial assistance of the greatest value has also been received from Mr. E. H. 

 Finlayson, District Inspector of Forest Reserves for Alberta, who has aided in the 

 determination of the general plan of the manual and has particularly assisted by 

 criticism of Chapter XIV; from Mr. R. B. Adams, Telephone Engineer, United States 

 Forest Service, Missoula, Montana, who has offered many valuable suggestions and 

 furnished much of the material contained in Chapters X and XIII; from Mr. J. 

 B. Somers, United States Forest Service, in connection with the use of the heliograph 

 and flag by the Service, and from many field officers of the United States Forest 

 Service and the Dominion Forestry Branch with whom the author has been associated 

 in forest administration. 



79211 A! 



