Withdrawal of the Piston.
Persons may sometimes withdraw the piston or plunger from the barrel, and on account of its peculiar construction be unable to return it again. Therefore, please observe that it is composed of two round pieces of leather, which are turned in opposite directions over the metallic plates—the upper one turning up, the lower one turning down. With the leathers thus arranged, it is to be introduced sideways into the barrel, and the portion of the lower leather which remains outside of the barrel gradually and carefully pressed in with the thumb nail. ☞ But in so doing be very careful not to cut or injure the leather. N. B.—Silver Plated Syringes, suitable for using nitrate of silver, furnished to order at short notice. (See Nitrate of Silver Injections.)