The area of the loop, which equals the area between the curve and its asymptote, is 3a/2.
The area between the curve and its asymptote is 37ra 2, i.e.
If A, B have opposite signs the form is au = sinh mO, (24) this has an asymptote parallel to 0=0, but the path near the origin has the same general form as in the case of (23).
To integrate this equation for a solid of given form is probably difficult, but it is easy to see that at some distance on either side of the body, where the liquid is sensibly at rest, the crest of the wave will approximate to an asymptote inclined to the path of the body at an angle whose sine is w/V, where w is the velocity of the wave and V is that of the body.
If, on the other hand, water is suddenly drawn off from a cistern supplied through a ball-cock, the flow through the ball-cock will be recorded, and will be represented by a sudden rise to a maximum, followed by a gradual decrease as the ball rises and the cistern fills; the result being a curve having its asymptote in the original horizontal line.