Carothers, supplied with an open-ended research grant from DuPont, made a comprehensive study of natural cellulose fibers. He duplicated natural fibers in his labs and polyamides - long fibers of a specific chemical process - were developed. (Curiously, Wallace Carothers committed suicide one week after the House Ways and Means Committee cannabis seeds, in April of 1937, had the hearings on cannabis and created the bill that would eventually outlaw hemp.) Coal tar and petroleum-based chemicals were employed, and different devices, spinnerets and processes were patented.

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