A manual of hypodermic medication : the treatment of diseases by the hypodermatic or subcutaneous method . The Authors Silver Syringe, with Gold Needles, Iridium-pointed,as made hy William Autenrieth, Cincinnati, Ohio. parency almost equal to glass, it is not fragile, and will notbreak by falling on a tiled or stone floor. On the otherhand, it is soluble in chloroform, and when the syringesmade of it require repairs they can be made only at theshops of the celluloid company. Hard rubber is a suitablematerial for syringes, but they are usually made verypoorly. An exception to this statement is
A manual of hypodermic medication : the treatment of diseases by the hypodermatic or subcutaneous method . The Authors Silver Syringe, with Gold Needles, Iridium-pointed,as made hy William Autenrieth, Cincinnati, Ohio. parency almost equal to glass, it is not fragile, and will notbreak by falling on a tiled or stone floor. On the otherhand, it is soluble in chloroform, and when the syringesmade of it require repairs they can be made only at theshops of the celluloid company. Hard rubber is a suitablematerial for syringes, but they are usually made verypoorly. An exception to this statement is the syringe of 36 HYPODERMATIC MEDICATION. Leiter, of Vienna, made so that the parts fit accuratelywithout screws, and can he therefore readily cleaned, andthey are very durahle. Of course the contents of a hard-rubber syringe are not visible, but the graduation of thepiston may be accurate. Fig. Fig. Hypodermatic Injection-Tube ofDr. John J. Thomas, of Youngs-town, Ohio. Kochs Syringe, as devisedby himself. Silver, according to my experience, is the best materialfor making hypodermatic syringes. It is practically inde-structible, and is not acted on by any fluid introduced into THE METHOD. 37 the tissues. The barrel can be constructed with a uniformbore, and an accurately-fitting piston assured. The objec-tion to it is that its contents are invisible; but the piston-rodcan be graduated with the utmost nicety. German silvermay be substituted for pure silver, as no solutions are in-jected that would corrode the material. Gold has alsobeen utilized for the construction of syringes. They arebeautiful in appearance, .durable and satisfactory in usage,but they are expensive, entirely out of proportion to theirutility. The needle is a very important part of the needles furnished with most instruments are too large,and have an abrupt shoulder at the cutting extremity, which
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