But sea-sickness also partly depends on the irregular pressure of the bowels against the diaphragm, as their inertia or weight varies with the rising and falling of the ship.

The average quantity passed in 24 hours by an adult varies from 40 to 60 fluid ounces.

The size of these varies in different plants, as it does in different parts of the same plant, and they are sometimes so minute as to require a million to cover a square inch of surface.

500.Q.How comes it, that the resistance of fluids increases as the square of the velocity, instead of the velocity simply? A.Because the height necessary to generate the velocity with which the moving object strikes the fluid, or the fluid strikes the object, increases as the square of the velocity, and the resistance or the weight of a column of any fluid varies as the height.

Varies between 2-1/2 to 4-1/4 hours.

The first source of pleasure varies of course with our condition and the state of the surrounding circumstances; the second with the amount and kind of power, and the extent and kind of action.