An apparatus is described for measuring the viscosity of glass in the range 6.5 to 13,000 poises. About 15 minutes per point are required to establish a viscosity‐versus‐temperature curve. About 75 gm. of glass are required for a determination. Precision is good, repair is simple, and maintenance is low. The apparatus is suitable for either research or control purposes.
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R. L. Tiede (1959) studied this question.
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