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By incorporating capillaries with long-flared ends in otherwise conventional U-tube or suspended-level viscometers, it is possible to produce instruments in which no significant kinetic energy effect occurs for the Reynolds numbers generally encountered in viscometry. A detailed experimental study of their behaviour has been made. Using the new viscometers a viscosity scale in absolute units can be established with greater accuracy and greater facility than has hitherto been possible.
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CAW et al. (1961) studied this question.
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