Glass fly catcher: 19th century

Glass fly catcher with three legs, and glass stopper. The fly catchers were used in the sickroom. They were baited with sugar and water, which was placed in the ring near the base. Flies which entered between the feet of the trap were unable to find their way out again and drowned in the sugar solution. http://www.museumoflondonprints.com/image.php?id=65603&idx=0&fromsearch=true