The Valves.
These consist of small mineral balls, and are operated in an improved chamber or cavity, which allows them to always work well, and are not liable to stick or become wedged, as has been the case with instruments formerly made with this kind of a valve. They are greatly superior to India-rubber valves, which soon, by the action of the fluid, become unfit for use. Should the valves by any means be lost, a common marble, if round, will answer the purpose. ☞ After the instrument has been used for administering any thick injection, it should be thoroughly cleansed by pumping some clear water through it, and all sediment which may remain in the valve chambers, A and E, should be removed, or it may cause an obstruction to the working of the valves.
N. B.—Be careful not to put the instrument away wet, or it will injure the box.