ving sharp those obtained by Froude for water, it is ends, each end seven inches long, and found that the equations are very similar. they were steadied by appropriate guides. The exponents are nearly the same for a The planes varied in length from two feet variety of materials, and the… … figure, combined with a twelve-caliber serve the effect of quality . of surface Interior of Tunnel Constructed so as to Increase the Resit ta nee. on the tangential stern, making resistance. Prac- the length about tically the same five times the friction was ob- major diameter. served, whether…
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