24 



BULLETIN" 227, U. S. DEPARTMENT OF AGRICULTURE. 



Avenarius carbolineum. 



[Laboratory sample No. 1843. Cooperator, Carbolineum Wood Preserving Co., Milwaukee, Wis. Thick 

 liquid at room temperature; specific gravity, 1.126 at 16.5° C; flash point, 139° C; burning point, 166° C.; 

 1.1 per cent distills below 215° C; 6.1 per cent distills below 275° C; 1.91 per cent tar acids.] 





Tests. 



Times 



killing 



point 



verified. 



Concentration of the preservative (per cent). 



Fungus. 



Num- 

 ber. 



Dura- 

 tion. 



0.17.5 



0.275 



0.3 



0.8 



1 



4 5 



5.25 



Check. 





53 



18 



Weeks. 



4 to 10 



5 to 6 



1 

 2 







2 

 



2 



1 



1 



1 







4 





1 



1 



* 4 

















Forties annosus: In 18 days, the radial growth of the check reached nearly 40 mm.; 

 0.3 per cent, 17 mm.; higher concentrations up to 4 per cent showed 1 to 6 mm. In 

 four to six weeks, 5 per cent reached 1 mm. The growth on the toxic media was 

 similar in appearance to that on the check. 



Fomes pinicola: In two weeks the radial growth of the check reached 40 mm.; 0.175 

 per cent showed no growth. In four weeks, 0.175 to 0.275 per cent reached 1 mm. 

 The growth on the toxic media was compact and darker than that on the check. 



S. P. F. carbolineum. 



(PL III. fig. 29.) 



[Laboratory sample No. 1844. Cooperator, Brunc-Grosehe & Co., New York, N. Y. Thick brown liquid, 

 specific gravity, 1.127 at 16° C; flash point, 133° C; burning point, 157° C; less than 9 per cent distills 

 below 245° C: about 30 per cent distills below 320° C; 2.42 per cent tar acids.] 





Tests. 



Times 



killing 



point 



verified. 



Concentration of the preservative (per cent). 



Fungus. 



Num 

 ber. 



Dura- 

 tion. 



1 



1.5 



1.7.5 



2 



3 



4 



4.51 



Check. 





73 



Weeks. 

 5 to 8 



o 



1 



1 



1 



1 



1 



1 







4 







i The growth of Fomes annosus on concentrations above 3 per cent is very slight, usually not exceeding 

 1 mm. in sis weeks, and the actual toxic point is difficult to locate. It lies between 4 and 5' per cent. 



Fomes annosus: In four weeks the radial growth of the check reached about 40 mm. ; 

 1 and 1.5 per cent, 1 mm. In six weeks, 1 and 1.5 per cent showed 5 mm.; 1.75 to 

 4 per cent, 1 to 5 mm. Tests were not made on concentrations below 1 per cent. 

 The growth on the toxic media was quite similar in appearance to that on the check. 



Water-gas tar distillate. 



(PI. Ill, figs. 27 and 28.) 



[Laboratory sample No. 2235. Cooperator, United Gas Improvement Co., Philadelphia, Pa. Greenish 

 brown liquid; specific gravity, 0.995 at 60° C; flash point, 81° C; burning point, 93° C; 3.3 per cent 

 distills below 180° C; 61.7 per' cent distills below 275° C; 80.3 per cent distills below 320° ('.] 





Tests. 



Times 

 killing 

 point 



verified. 



Concentration of the preservative (per cent). 



Fungus. 



X um- 

 ber. 



Dura- 

 tion. 



0.1 



0.2 



0.3 0.35 



0.4 



0.45 



0.5 



0.6 



0.65 



Check. 





58 



Weeks. 



5 to 8 







4 



3 



2 2 



1 



1 



1 



1 







4 











