. The Dental cosmos. ons, asthey precipitate the novocain in theform of the base, which is insoluble inwater, the tablet consisting of the hydro-chlorid of novocain. The use of saturated borax solutionfor preserving the syringes I have foundunsatisfactory, as the metal parts arequickly oxidized, and borax in substanceis deposited thereon. Even in the al-cohol solution, oxidation of the metalparts of the syringe will take place aftera while, so that occasional cleansing andsterilizing of the syringe is more deeply the syringes dip into RIETIOIULLER.—FURTHER STUDIES OX NOVOCAIN
. The Dental cosmos. ons, asthey precipitate the novocain in theform of the base, which is insoluble inwater, the tablet consisting of the hydro-chlorid of novocain. The use of saturated borax solutionfor preserving the syringes I have foundunsatisfactory, as the metal parts arequickly oxidized, and borax in substanceis deposited thereon. Even in the al-cohol solution, oxidation of the metalparts of the syringe will take place aftera while, so that occasional cleansing andsterilizing of the syringe is more deeply the syringes dip into RIETIOIULLER.—FURTHER STUDIES OX NOVOCAIN-SUPRARENIN. 13^0 the alcohol mixture, the greater theguarantee that they will be sterile whenremoved therefrom, and that no con-tamination of the solution with bacteriacollected on the outside of the syringecan take place. I am at present conducting a seriesof experiments with white liquid vase-lin as a medium in which to preservesyringes, hypodermic needles, etc., insterile condition. From evidence gained Fig. Writers stock flask for Ringer solution. so far, this or similar media will offerconsiderable advantages over alcohol. Amore definite verdict, however, must bereserved for a future paper, as a greatmany bacteriological and other tests willhave to be made before any decision canbe reached as to the advisability of theadoption of these petroleum products forthe purpose indicated. STOCK FLASK FOR RINGER SOLUTION. For preparing, preserving, and dis-pensing the Einger solution under as nearly bacteria-proof conditions as pos-sible, I have designed the receptaclesillustrated in Figs. 5 and G. The flaskin Fig. 5 has a small pinhole openingin the side of the neck, as does theground-glass cover. If a quantity of so-lution is desired, the cover is turned tomake the two holes coincide and admita minimum of air. which additionallycan be filtered by fastening a pledget ofsterile cotton over the hole in the neck Fig. 0.
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Keywords: ., bookcentury1900, bookdecade1910, bookiddent, booksubjectdentistry
