APPENDIX E STANDARD SPECIFICATIONS 

 9 Specifications for Wooden Spools for Emergency Wire 



217 



The spool on which the emergency wire is to be wound is to be made in accord- 

 ance with the drawing attached hereto and made a part of these specifications. The 

 material is to be clear, straight-grained, thoroughly seasoned pine; the manufacture 



Sketch of Emergency Wire Spoof 

 Specifications 9 Design of Forestry Branch standard emergency wire spool 



is to be of the best grade and the spools are to be finished with two coats of shellac 

 varnish. The weight of the finished spool should be approximately three-quarters of 

 a pound. 



10 Specifications for Creosote 



The oil used shall be the best obtainable grade of coal-tar creosote, that is, it 

 shall be a pure product obtained from coal-gas tar or coke-oven tar and shall be free 

 from any tar, oil or residue obtained from petroleum or any other source, including 

 coal-gas tar or coke-oven tar; it shall be completely liquid at 98 C. and shall be free 

 from suspended matter; the specific gravity of the oil at 38C. shall be at least 1-03. 

 When distilled by the .common method (that is, using an 8-ounce retort, asbestos- 

 Covered with standard thermometer, bulb 4 in. above the surface of the oil) the creo- 

 sote, calculated on the basis of the dry oil, shall give no distillate .below 200., not 

 more than 5 per cent below 210C., not more than 25 per cent below 235C., and the 

 residue above 355C. if it exceeds 5 per cent in quantity, shall be soft. The oil shall 

 not contain more than 3 per cent water. 



