ameter of tunnel, B. The shield is made water- pleasant terebinthinate odor. The odd of tar comes over in rosin; while the “scrapings,” the inspissated gum from the tight in front by an adjustable head (C), composed of strong the latter part of the process, and a black residuum remains in the still… … of the manufacturers during their operations. Some of them have been very intelligently worked out and identified by Mr. William A. Martin, the chemist of the works we have visited. Some remain to be investigated. Terebinthine tree facings, yields an inferior rosin, from very dark to iron sections,…
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