| http://www.w3.org/ns/prov#value | - The intrinsic viscosity of material of relatively low molecular weight from the mother liquor of the polymer-formation in solution may be increased by treatment, while still in ethanol or other solution, with a further quantity of oxalic ester, when further polymer is precipitated, the characteristics of which approximate to those of the initial precipitate, and which may, if desired, be subjected
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