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The use of mixing vials in place of the usual calibrated viscometers as vessels for dissolving cellulose in cuprammonium solution is described. The solution of cellulose is prepared in the vial and poured into a calibrated viscometer for flow measurements. The data given show that the exposure of the solution to the air for the short time required for pouring has no measurable effect on the fluidity.
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R.T. Mease (1941) studied this question.
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