Holley, Clifford Dyer · New York, J. Wiley & Sons; · leaf 146
THE PRACTICAL TESTING OUT OF PAINTS. 135 laboratory, is illustrated in Fig. 9. These test frames, so-called, have the additional merit of being easily trans- port(>d from one place to another for inspection. These frames are 3 feet m length and 16 inches in width, the edge of the upper clapboard… … Fig. 9. — Portable Test Frames. little, SO that two or more frames may be put together, forming a unit surface exactly similar to the side of a house. These frames are made to be screwed to a framework Uke that illustrated in Fig. 8. The clap- boards, four in number, are set four inches to the…
Paint · Varnish and varnishing
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