# General Law

## Description

The general rule of downward pressure is "the pressure upon the bottom of a vessel containing a fluid is independent of the shape of the vessel, and is equal to the weight of a prism of the fluid whose base has the same area as the bottom of the vessel, and whose altitude is the distance between the bottom and the upper surface of the fluid, plus the pressure per unit of area upon the upper surface of the fluid multiplied by the area of the bottom of the vessel."

## Keywords

downward pressure, downward pressure rule, general rule for downward pressure, what is the general rule for downward pressure

## Galleries

## Source:

*The Boys of '76. A History of the Battles of the Revolution* (New York, NY: Harper & Brothers, 1879)

Courtesy the private collection of Roy Winkelman