Society of Glass Technology · [Sheffield] · leaf 340
FIG 3 Fig. 4. In face p. 262, Trans. DEVICE FOE, MEASURING DIAMETER OF GLASS TUBING. 263 on the flask. The ferrule E is then brought into contact with thetop of the flask, and so the tube A is kept in position with theballs at the right distance inside the flask. The cone is thenpushed gently home,…
Glass
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