Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . ve had advanced, but itdoes not seem to have been reduced to an andsystematic science among them. The enamel, encaustic, ami fresco work of the an-cients has come down to us in jirofusion. Theirpaintings on paper, canvas, leather, and wood havemostly perished. The even climate of Egypt andthe seclusion of the tombs e.^cavated in the rock byits ancient inh
Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . ve had advanced, but itdoes not seem to have been reduced to an andsystematic science among them. The enamel, encaustic, ami fresco work of the an-cients has come down to us in jirofusion. Theirpaintings on paper, canvas, leather, and wood havemostly perished. The even climate of Egypt andthe seclusion of the tombs e.^cavated in the rock byits ancient inhabitants have, however, preservedmany .specimens of their painting on wood andfabric in the mummy cases and wrappings. The bricks of Mesopotamia and the pottery ofEtruria are also very ancient and interesting, thelatter especially exhibiting a refined taste. The modes in which colors may be applied to pro-duce variois etfects, and possess moi-e or less endur-ance, are described under , Encaustic,En.^.mel, , Oil, Size, Water-colors. Seelist umler Fine Arts. Paint-mill. A machine for grinding pigments. In Fig. 3493, a circular pan A containing the paintis rotated by appropriate mechanism, while stirring Fig. Paint MM. and scraping feet are eauseil to revolve therein bymeans of bevel-gearing. The discharge is effectedby a curved scraper C, which brings tlie mass to acentral opening F, provided with a tubular cover orvalve D. In Masurys paint-mill the upper millstnne bed d n is sup-ported oa pillars b h bolted to a cast-iron table : both the upjierand lower beds a a c c are hollow and receive thin annular disl(sof stone tt ij e e: the lower is supported on a hollow shaft / ro-tated by the bevel-geirs ^ /i, driven by the pulleys J, which also,tlirough the medium of bevel-gears i-/and spur-wheels w n, turnan arm in the mixer o. The lower stone is raised into contact with the upper one by turning the wheel /j, which raises the screw-step q of the hollowshaft /,
Size: 1979px × 1262px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectin, booksubjectmechanicalengineering
