I. over iHutlration 



•Jif>ifi a temporary 



pen trtoting'iank, 



wood 



gtUwm- 



ml- 



joint*; 



'fUxS 



tttam 



heating. 



Wood Preservation is always available 

 by using the Open-Tank System 



THE Open-Tank System of creosoting wood is not a substitute for any other 

 process, nor is it a makeshift. Within its limitations, it is the best method. 



It is particularly suitable for the preservative treatment of all structural wood which, 

 when in place, is not subject to severe mechanical abrasion. 



It is adaptable to all conditions, is economical and effective. • 



The cost is reasonable and warranted in each 

 case where the mechanical life of the structure is 

 greater than the natural life of the wood. 



The illustrations herewith show a temporary plant, 

 and its operation during the treatment of over 

 one-quarter million feet, board measure, of 12 x 12 

 inch and 6 x 12 inch timbers, used as floor-fram- 

 ing in an industrial building in which conditions 

 are favorable to the development of decay. 



An average absorption was obtained of approxi- 

 mately 10 gallons of CARBOSOTA Creosote 

 Oil per 100 square feet of surface. 



The theory of the Open-Tank System is that in 

 the hot treatment the heat of the preservative ex- 

 pands and expels a portion of the air and water 



contained in the wood-cells. Then upon immer- 

 sion in the cold oil, or when subjected to the 

 change in temperature caused by the cooling of 

 the creosote, there is a partial contraction and 

 condensation of the air and water that remain, 

 resulting in a slight vacuum within the wood. This, 

 aided by atmospheric pressure combined with 

 capillary action between the wood-cells and the 

 preservative, achieves the actual impregnation. 



Barrett's CARBOSOTA — Gra</r-On^ Liquid 

 Creosote Oil is derived from pure coal tar, and re- 

 fined especially for the Brush Method and the 

 Open-Tank System of treatment. It meets all 

 official specifications, and is recognized as the 

 Universal Standard by all authorities. Write for 

 helpful booklet, " Long Life for Wood." 



The 



New York 

 Detroit 



Company 



Chicago Philadelphia Boston 



Birmingham Kansas City Minneapolis 



Tbe Paterson Manufacturino Company, Limited: Montreal 



St. John, N. B. Halifax, N. S. 



St. Louis 

 Nashville 



Cleveland 

 Salt Lake City 



Cincinnati 

 Seattle 



Toronto 



Sydney, N. S 



Winnipeg 



Pittsburgh 

 Peoria 



Vancouver 



