APPENDIX C TELEPHONE COSTS, 201 



7 PERIODICALS 



" Telephony " (weekly) published by Telephony Publishing Co., 341 Monadnock 

 Block, Chicago, 111., U.'S.A. price, $3 per year. 



" Western Electric 'News " (monthly) published by the Western Electric Co., 

 (company organ). 



3 TMADE CATALOGUES AND HANDBOOKS 



" Handbook of Insulated Wires and Cables " issued by Phillips Insulated Wire 

 Co., Pawtucket, R.I., U.S.A. 



" The Simplex Manual " issued by the 'Simplex Wire and Cable Co., 201 Devon- 

 shire St., Boston, Mass., U.S.A. 



*" Wire in Electrical Construction ' 'issued by John A. Roebling's Sons Co.. 

 Trenton, N J., U.S.A. 



" Electrical Wires and Cables " issued by the American 'Steel & Wire Co., Montreal, 

 Quebec. 



" Northern Electric Telephone Apparatus and Supplies, Catalogue No. 3 " issued 

 by the Northern Electric Co., Montreal, Quebec. 



(*) The books and government documents marked with this symbol will be found 

 particularly suited to those who have made no previous study of telephone science but 

 desire to secure some elementary knowledge of the instruments and of signalling 

 methods in general, with the use that may be made of rapid means of communication 

 in forest protection. 



A great deal of useful information may be secured from the trade catalogues 

 issued by the various manufacturers of telephones and telephone supplies and also by 

 the manufacturers of iron and copper wire. These will always he furnished gladly on 

 application, are nearly always profusely illustrated, and often contain much valuable 

 data that is available nowhere else. 



APPENDIX C 



TELEPHONE COSTS 



1 FACTORS INVOLVED IN THE ESTIMATION OF COSTS OF POLE AND TREE TELEPHONE LINES 

 The cost of forest-protection telephone lines depends upon so many variable 

 factors that general statements are of very little value. Particularly is this true since 

 the beginning of the European War. Materials and equipment have increased enor- 

 mously in price, some have even become unobtainable and great delays in delivery must 

 be expected in nearly all supplies. Labour has also both increased in price and to a 

 certain extent decreased in quality. As in other construction work, estimates of 

 supplies 1 must be based on quotations and freight rates to point of delivery. Esti- 

 mates of transportation away from railways must be based on daily cost of transport 

 equipment, average load, and average daily trip. Estimates of labour must be based 

 on daily wage scale with proper allowance for board, and a knowledge of what con- 

 stitutes a reasonable day's task under the existing conditions that to a certain extent 

 differ with each project. This can only be done properly 'by a study of conditions 

 along the proposed route, coupled with an accurate knowledge of actual costs on 

 similar projects. Classified project costs are being accumulated by the Forestry 

 Branch but as yet are not available for the general information of the field staff. 



