IMPROVED PEN RACK.
Harvey W. Forman, Golden City, Col.--This consists of an upper frame
with intercrossing wires, forming wide spaces or meshes, and of a
second frame with closer wires below the same, for holding the pen in
upright position, in connection with a bottom pad or absorbent below
the rack frames.
Scientific American, Vol. XXXVII.—No. 2. [New Series.], July 14, 1877 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures · 第 109 / 213 题