A one-page 1861 Scientific American article describing Edward Juanes y Patrullo's patented machine for removing the fleshy tissue from agave (sisal) leaves to produce sisal hemp fiber. It explains how the leaves are fed through fluted rollers and struck by alternating smooth and serrated beaters on a drum, with belts that keep the beaters clean. An engraving of the machine accompanies the text, along with patent dates and the inventor's New York address.