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Plate VII.—Showing the construction of wood curing-room: 1, 1, 1, sill; 2, 2, 2, a 
two-by-ten spiked to ends of joist; 3, 3, 3, a two-by-four spiked down, after 
first layer of floor is laid, to toe-nail studs to; 4, 4, 4, a two-by-four spiked to 
upper ends of studding of first story. A, A, A, A, three-ply acid and water- 
proof paper. The drawing in the center shows space between studding filled 
with sawdust and another dead-air space to be used when the best ducts 
cannot be provided. (From Wis. Agr. Exp. Sta. Bul. 70.) 
