### Density

An illustration of calculating the density of a liquid.

### Egg Plunged in Fresh and Salt Water

An egg dropped in fresh and salt water to show the properties of density.

### Endosmometer

An instrument used to measure the force of the intermingling of two liquids of different densities,…

### Gas Density

This illustration shows gas with a heavier density then air collecting at the bottom of a beaker.

### Hempel Gas Burette

A Hempel Gas Burette is an instrument used to measure gases.

### Hydrometer

"The Fahrenheit hydrometer of constant volume is made of glass, the bulb at the bottom being loaded…

### Hydrometer

Nicholson's Hydrometer, consists of a hollow cylinder of metal with conical ends, terminated above by…

### Hydrometer

Nicholson's Hydrometer, consists of a hollow cylinder of metal with conical ends, terminated above by…

### Hydrometer of constant weight

"As generally made, a hydrometer of constant weight consists of a glass tube near the bottom of which…

### Standard hydrometer

"Hydrometers of variable immersion are usually light hollow glass spindles weighted by shot or mercury."—Finley,…

### US Internal Revenue hydrometer

"The US Treasury Dept. and its internal revenue servie uses a series of carefully adjusted hydrometers…

### Light Intensity Versus Distance

"Another illustration of how luminous density varies inversely as the square of the distance." —Croft…

### Metal Density

This illustration shows metal sinking to the bottom of a beaker.

### Mixture of Gases

When gases of different densities are inclosed in the same space an intimate mixture takes place, so…

### Scale Designed to Weigh Objects While Underwater

"The most common way of determining the density of such a body [that is heavier than water] if it is…

### Specific gravity bottle

A device used for measuring the specific gravity of an object or substance.

### Specific Gravity of Solids

One of the commonest ways of determining the density of a solid body is to weight it first in air and…