A letter to Dr. Cheyne : containing an account of the motion of water through orifices and pipes; and an answer to Dr. Morgan's remarks on Dr. Robinson's Treatise of the animal oeconomy.

  • Bryan Robinson
Date:
1735
Catalogue details

Licence: Public Domain Mark

Credit: A letter to Dr. Cheyne : containing an account of the motion of water through orifices and pipes; and an answer to Dr. Morgan's remarks on Dr. Robinson's Treatise of the animal oeconomy. Source: Wellcome Collection.

    29/56 (page 29)
    [ *? ] given, or be the fame in Pipes of Lengths greater than 1x8.5739 D/D. It was nearly lo in Pipes of half an Inch in Diameter, and of different Lengths from a Pipe of 4 Feet in Length to one of 100, when the perpendicular Height of the Water in the Veffel was 3 Feet. From the Nature of the Motion of Water through Pipes, I think there rnuft be a certain Length of a Pipe of a given Diameter beyond which -Tji does not meafure the Velocityj but what that Length is I cannot fay for want of Experiments. The Reafon why this Meafure of the Velocity does not begin to ob¬ tain till the Pipe be of a certain Length, may be this. The lateral Motion of the Water defending in the Veffel, which Motion has been fhewn to affect and difturb the Mo¬ tion of Water flowing through a Hole,