Forgetting The Glass

the Corning people went to a lot of trouble to turn out a piece of glass (Fig. 24) that fits perfectly in both a glass joint and a rubber adapter, so use it  

SOCIALLY ACCEPTABLE THINGS TO DO WITH THE ADAPTOR WITH LOTS OF NAMES 

This one (Fig. 25) is really ingenious. If you re tempted in this direction, go sit in the corner and repeat over and over, 

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