Bulletin of the of Agriculture . URE. of free carbon in the mixture there was a decrease in the absorptionand penetration. However, in the case of mixtures with tar No. 3(fig. 4, c) after a certain point was reached there was a rise hi thepenetration and absorption curves upon the addition of larger per- IMPREGNATION TESTS.(Data in Tables 5, 6, and 7.) z^u Ota. s--M g«6« I/JM ffl0.,4 j3« £TAR -TARN 101000 900 800 700 *^Tta 600 s H TAR HO 2 X 500 kl OC KtAR 3 S3 400 ee ft, 300 200 100 nflfl 25 50PERCENT OF TAR BY VOLUME 73 100 Fig. 3. -The variation in time of treatment and pressu
Bulletin of the of Agriculture . URE. of free carbon in the mixture there was a decrease in the absorptionand penetration. However, in the case of mixtures with tar No. 3(fig. 4, c) after a certain point was reached there was a rise hi thepenetration and absorption curves upon the addition of larger per- IMPREGNATION TESTS.(Data in Tables 5, 6, and 7.) z^u Ota. s--M g«6« I/JM ffl0.,4 j3« £TAR -TARN 101000 900 800 700 *^Tta 600 s H TAR HO 2 X 500 kl OC KtAR 3 S3 400 ee ft, 300 200 100 nflfl 25 50PERCENT OF TAR BY VOLUME 73 100 Fig. 3. -The variation in time of treatment and pressure necessary to secure a given absorption in pavingblocks using mixtures of creosote No. 4 and carbon-free tars Nos. 1, 2, and 3. centages of free carbon to the mixture. It is probable that this wascaused by the character of the free carbon mats formed on the sur-face of the wood as the mixture was forced into the interior of thespecimens. The free carbon particles in tar No. 3 were very much Bui. 607, U. S. Dept. of Agriculture. Plate i s
Size: 1442px × 1733px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
