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Unformatted text preview: in order to grip the stirrer securely. A few drops of glycerol or mineral oil placed between the upper portion of this tubing and the stirrer allow the latter to rotate freely with very little friction. Alternatively a mercury-sealed stirrer may be employed. Here again a short glass tube C is inserted through the cork of the flask to act as a collar for the stirrer. The tube C carries a short wide tube B which is either fused at its lower end to C, or is fixed to it by means of a cork as shown. The stirrer D carries a precisely similar tube E, the top of which however is now fixed to D: the bore of the tube E allows it to fit easily within the annular space between the collar C and the tube B. Mercury...
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This note was uploaded on 09/19/2011 for the course CHM 2211 taught by Professor Castalleano during the Fall '06 term at University of Florida.
- Fall '06
- Organic chemistry