The Seasoning and preservative treatment of arborvitæ poles . ........ Per Per cent. Per cent. Per cent. i Days. 270 300 330 1 360 390 420 Per 5 Per Per Per cent. 60 90 120 •20. 22--. a 1-50 180 210 From the same data Table 6 has been deduced, showing the mostadvantageous shipping time for poles cut at different seasons, the [Cir. 136] 13 weight which they should reach, their moisture per cent, and the percent of f
The Seasoning and preservative treatment of arborvitæ poles . ........ Per Per cent. Per cent. Per cent. i Days. 270 300 330 1 360 390 420 Per 5 Per Per Per cent. 60 90 120 •20. 22--. a 1-50 180 210 From the same data Table 6 has been deduced, showing the mostadvantageous shipping time for poles cut at different seasons, the [Cir. 136] 13 weight which they should reach, their moisture per cent, and the percent of freight weight saved. Table 6.—Relative economy of various cutting seasons and shipping times. Cut. Shipafter— Weight percubic foot. Moisture. Freight saved. a Per Per 6 4 1 These shipping periods are set with reference to the average ofthe cutting period; that is, an autumn-cut pole if held until the fol-lowing May would save per cent on freight charges. The saving 4G*fo. Ytv,. 4.—Diagram showing effect of rate of growth upon seasoning. on a car of seasoned poles will be considerable, especially if shippedto distant points. The effect of rate of growth upon seasoning is shown by thecurves in figure 4. The sapwood alone has been considered. • Fromthese curves it is apparent that poles having less than 20 annualrings per inch in the sapwood season nearly 4 per cent faster thanthose of slower growth. The effect of hollow butts upon the rate of seasoning is shown bythe curves in figure 5. These curves show that poles having hollowbutts, in which the decayed portion is -1 inches or over in diameter,season about per cent faster than those having solid butts.(Fig. 5.) [Cir. 136] 14 SHBIZTKaltZ. The sapwood zoiie of an arborvitae | Le is nan w at the butt and gradually widens as the top is approached. Because of this propor- . oately greater amount of sapwood at the top, the - og is most rap
Size: 2111px × 1184px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherwashingtongovtprin
