The art of weaving, by hand and by power, with an introductory account of its rise and progress in ancient and modern times (1844)
Gilroy, Clinton G · New York, Baldwin · leaf 178
as keeps the cords at regular distances. The other twoboards u, v, are called trap boards, and are mortised into the move-able bars 771, m, called the arms of the trap boards, have their holesof a sufiicient size, about a quarter of an inch in diameter, to allowthe knots on the cords o, to pass… … Fiff. 72.
Weaving
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