Paper, 'Description de quatre découvertes' [Account of four new inventions] by Isaac de la Chaumette De la Chaumette describes his four new inventions: an iron plate or flap (for a chimney) moveable by the pressure of air, a cylinder with ten or 12 circles which might serve as a toothpick case, a candlestick which in turning makes the candle rise and cleans the inside of the socket and a plate at the butt end of a gun which being laid to the breast causes a spying glass to rise up. Includes one page of figures of the inventions. Subject: Engineering Read to the Royal Society on 4 April 1728 1728