A short 1677 account, extracted from the Journal des Sçavans, of a mill-driven mechanical loom devised by Monsieur de Gennes, a naval officer, and presented to the Royal Academy. It describes the serpent (iron crank bar), treadles, clapper (beater), and shuttle-carrying arms with their pulleys, weights and whale-bone spring, and how they work together to open the shed, pass the shuttle and beat up. It ends with the claimed advantages: one mill driving 10 or 12 looms, wider cloth, fewer broken threads and lower labor cost.