it

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11

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46

FLUIDITY AND PLASTICITY

The smallest tube with which he experimented, A, gives a
curve, only part of which is shown in the figure. It should be

BT

/ 21*20

PIG. 17.—The transition from viscous to hydraulic flow with coaxial cylinders.
added that Reynolds corrected Poiseuille's data for the loss in
kinetic energy.
For pipes ranging in diameter from 0.0014 to 500 cm and for
pressure gradients ranging from 1 to 700,000, there is not a
difference of more than 10 per cent in the experimental and