A Durable Flask for Density Measurements by Students Breakage is costly when ordinary volumetric flasks are used in determining the density of metal samples. Salisfnctory flasks (see illustration) for this work can be made from heavy tubing by a. glassblower, tthe thicker wall reducing the loss. The flasks are from Don Lillie, Inc., 3431 Lake Drive, S. E., Smyrna, Ga. 3008O. Also needed is Pyrex bubing: 0.3-in. (7.5 mm) i.d. and 0.5-in. (12.7 mm) o.d. The cost is sboot two-thirds of commercial flasks. The circle and the line are applied by the maker, giving a professional finish. Volume is about 25 ml; please note that it need not be calibrated. The inside diameter of the neck is slightly more than the usual but the error is not noticed in the results of beginning students. The base is much larger, giving stability.
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WILBURL. BAKER EMORY UNVERSITY ATLANTA, GEORGIA30322
Volume 45, Number 8, August 1968
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