FEBRUARY, 1990
DRYING TUBE FOR THE ORGANIC LABORATORY MARTIN CHANIN Evansville College, Evansville, Indiana
THEapparatus illustrated was constructed to provide a constant source of clean, dry hot compressed air for general laboratory use. Though the organic laboratory classes find continual use for it, it is helpful to analytical and physical chemistry students. A 2-foot length of 2-inch iron pipe was threaded a t both ends and adapted for a standard a/s-inch hose nipple. The pipe was packed loosely with glass wool and the nipples screwed in by hand. The tube was mounted on a ring stand, as shown, and a Meker burner was laced under the middle of it. This apparatus i a y be used for drying a complete laboratory "setup." The compressed air is passed through the tube and the burner is lighted. Hot compressed air is passed through the apparatus and when warm air comes out the eauioment is dm. Several similar units have also been "constructed of three-quarter inch pipe, 18 inches long. These are available to students who wish to use them on their own laboratory desks.
Many months of almost continuous service have not necessitated a repacking of the original glass wool.
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