Manual of hypodermic medication / by Roberts Bartholow.

  • Bartholow, Roberts, 1831-1904.
Date:
1869
Catalogue details

Licence: Public Domain Mark

Credit: Manual of hypodermic medication / by Roberts Bartholow. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    The advantages of a glass instrument are these : The cylinder may be graduated. The contents are visible to the eye. Cheap instruments of hard rubber are also in use. They quickly get out of order, and are much inferior in construction to the fine English, French, and Ger- man syringes mentioned above. Nevertheless, a hard rubber syringe may be preferred for the injection of certain minerals. After considerable experience and no little vexation in the use of various kinds of instruments, I do not hes- itate to declare my preference for the silver hypodermic syringe. It is made of pure silver, and has a capacity of thirty minims. It contains two silver needles of different sizes, and also a trocar, which screw on to the barrel. The needles are somewhat lancet-shaped, and readily perforate the skin. The piston does not work with a screw; it is packed with leather, and accurately fits the barrel. The lower extremity of the piston is filled in with a silver plate, which closely adapts it- self to the bottom of the cylinder, in order to insure the expulsion of all the fluid. The piston-rod may be grad- uated, but I prefer to use a minim-glass. The piston of this instrument works so accurately that every drop in the minim-glass may be drawn up into the barrel by aspiration, and all may be injected except the small portion which remains in the needle. The advantages of the silver hypodermic syringe are these: It is not readily broken. It will wear indefinitely. It performs the required work in a satisfactory manner.