网页Flasks with flat bottom. Cassia flasks, for the analysis of essential oils and aldehyde determination, approx. 100 ml, neck graduated 0 - 6 : 0,1 ml. Erlenmeyer flask [introduced in 1861 by German chemist Emil Erlenmeyer (1825–1909)] - is shaped like a cone, usually completed by the ground joint, the conical flasks are very popular because of their low