TESTS OF WOOD PRESERVATIVES. 



17 



Table 2. — Penetrance of the preservatives and their effect on the strength of wood. 





Preservative desig- 

 nated by coopera- 

 toras— 



Penetration. 



Average 

 absorption 

 of preserv- 

 ative per 

 cubic foot. 



Strength 

 in per cent 

 of modulus 

 of rupture 

 ofuntreat- 



ed wood. 



Moisture at test. 



Pre- 

 serve 



Radial and 

 tangential. 



Longitudinal. 



Untreated. j Treated. 





Maxi- 

 mum. 



Mini- 

 mum. 



Maxi- 

 mum. 



Mini- 

 mum. 



1 



Coal-tar creosote 



Coal-tar creosote, 

 Fraction I. 



Coal-tar creosote, 

 Fraction II. 



Coal-tar creosote, 

 Fraction III. 



Coal-tar creosote, 

 Fraction IV. 



Coal-tar creosote, 

 Fraction V. 



Water-gas-tar creo- 

 sote, 1.051. 



"Water-gas-tar creo- 

 sote, 1.012. 



Water-gas-tar creo- 

 sote, 1.070. 



S. P. F. carbolineum. 



Avenarius carbo- 

 lineum. 



C. A. wood preserver. 



Hardwood tar 



Wood tar (Douglas 

 fir). 



Beechwood creosote. 



Inch. 



0.28 



.45 



.45 



.45 



.37 



.12 



.45 



.45 



.10 



.37 

 .17 



.27 

 .03 



.08 



.36 

 .38 

 .08 

 .37 

 .02 

 .22 

 .45 

 .45 

 .10 

 .10 

 .25 



.13 



Inch. 



0.23 



.21 



.17 



.21 



.18 



.07 



.33 



.42 



.10 



.23 

 .12 



.20 

 .03 



.08 



.106 



.18 



.05 



.15 



.02 



.22 



.43 



.30 



.08 



.08 



.17 



.10 



Inches 

 6.00 

 6.00 



6.00 



6.00 



6.00 



3.80 



6.00 



6.00 



6.00 



6.00 

 6.00 



6.00 



.92 



3.58 



6.00 

 6.00 

 3.75 

 6.00 

 .33 

 6.00 

 6.00 

 6.00 

 6.00 

 6.00 

 6.00 



6.00 



Inches. 

 5.30 

 6.00 



6.00 



6.00 



5.50 



1.20 



5.00 



5.30 



3.33 



5.70 

 5.30 



4.70 



.50 



2.33 



3.16 

 4.50 

 1.50 

 4.30 

 .33 

 4.08 

 6.00 

 6.00 

 5.30 

 4.66 

 4.66 



4.60 



Pounds. 

 8.76 

 5.28 



6.86 



7.55 



7.33 



2.00 



6.45 



7.18 



9.58 



8.77 

 8.08 



8.43 

 6.50 

 2.82 



12.68 

 8.09 

 6.27 



12.86 

 5.68 

 8.58 



12.70 



14.51 

 2.43 

 3.96 



3 1.11 



3.50 



Per cent. 

 93 

 101 



92 



92 



96 



90 



92 



90 



108 



100 

 109 



100 

 98 

 107 



99 

 96 

 107 

 110 

 106 

 101 

 117 

 90 

 88 

 89 

 82 



85 



Per cent. 

 6.20 

 5.88 



6.22 



6.44 



6.43 



6.29 



5.53 



6.18 



4.52 



6.40 

 6.81 



6.99 

 6.11 

 5.80 



5.30 

 6.95 

 6.24 

 6.41 

 6.68 

 5.49 



Per cent. 



2 





3 





4 





5 





6 





r 





% 





9 





10 





11 





12 





13 





14 





15 





16 





17 



Preservol 





18 



Wood-creosote oil 



Timberaspnalt 





K 





20 





21 





22 





5.18 

 7.13 

 5.14 

 3.88 



5.16 





23 



24 



25 



26 



27 



Zinc sulphate 



Zinc sulphate (by- 

 product). 

 B. M. preservative. . . 



9.35 

 9.60 

 5.77 



9.48 



28 



29 ... 



30 



Sodium fluoride 



.05 

 .10 

 .10 



.03 

 .10 

 .10 



.46 



6.00 

 6.00 



.30 



5.00 

 3.30 



.99 

 .20 



.46 



82 

 85 

 103 



6.42 

 5.82 

 5.72 



7.38 

 8.70 

 6.58 



i A penetration of 6 inches was the maximum that could be secured longitudinally, 0.45 inch was the 

 Maximum radial and tangential. The absorptions here given have no reference to the data on penetrance, 

 a Dry salt. 3 For composition see Table 1. 





Table 3. — Permanence of the pres 



^natives 



after injection into wood. 







Preservative designated by 

 eooperator as — 



Volatility. 



Preserva- 

 tive No. 



Per cent volatilized after seasoning for — 





10 days. 



20 days. 



30 days. 



50 days. 



70 days. 



90 days. 



1 





11 

 38 

 22 

 13 

 8 

 6 



16 

 18 

 2 

 3 



15 

 48 

 30 

 21 

 11 

 6 

 26 

 21 

 3 

 4 



17 



53 



36 



28 



14 



5 



32 



25 



3 



5 



20 

 57 

 44 

 34 

 18 



6 

 41 

 30 



4 



8 



1 

 + 1 



6 

 15 

 25 



7 

 16 

 16 

 + 1 



6 

 11 

 88 



22 

 57 

 47 

 37 

 20 



7 

 45 

 33 



5 

 11 



1 

 + 1 



6 

 14 

 29 



8 

 17 

 16 







4 

 13 

 91 





2 



Coal-tar creosote, Fraction I. 

 Coal-tar creosote, Fraction II. 

 Coal-tar creosote, Frac. Ill .. . 

 Coal-tar creosote, Fraction IV 

 Coal-tar creosote, Fraction V 

 Water-gas-tar creosote, 1.012. 

 Water-gas-tar creosote, 1.051. 

 Water-gas-tar creosote, 1.07.. 



S. P. F. carbolineum 



Avenarius carbolineum. 





3 





4 





5 





6 





7 





8 





9 





10 





11 





12 





-2 



_2 







13 



Hardwood tar 



2 

 15 



21 

 5 



16 



15 



-12 



5 



7 



81 





14 



Wood tar (Douglas fir) 



Beechwood creosote 



12 

 14 

 1 



11 

 11 



14 

 17 

 3 

 15 

 13 





15 





16 



Spirittine 





17 







18 







19 







20 





2 i 

 55 



5 



4 



74 





21 



Fuel oil 





22 



Kerosene 











