ClipArt ETC
This apparatus allows chemists to mix chemicals and observe the gases that come out of the mixtures.

Brownlee

This apparatus allows chemists to mix chemicals and observe the gases that come out of the mixtures.

"The tip or armature of a gas-burning lamp or bracket, through which the gas is caused to issue for consumption." -Whitney, 1911

Argand Gas Burner

"The tip or armature of a gas-burning lamp or bracket, through which the gas is caused to issue for…

"The tip or armature of a gas-burning lamp or bracket, through which the gas is caused to issue for consumption." -Whitney, 1911

Bat's Wing Gas Burner

"The tip or armature of a gas-burning lamp or bracket, through which the gas is caused to issue for…

A chemistry apparatus.

Chemistry Apparatus

A chemistry apparatus.

A hydrometer is an instrument used to measure the specific gravity (or relative density) of liquids; that is, the ratio of the density of the liquid to the density of water. A hydrometer is usually made of glass and consists of a cylindrical stem and a bulb weighted with mercury or lead shot to make it float upright. The liquid to be tested is poured into a tall jar, and the hydrometer is gently lowered into the liquid until it floats freely. The point at which the surface of the liquid touches the stem of the hydrometer is noted. Hydrometers usually contain a paper scale inside the stem, so that the specific gravity can be read directly.

Common Hydrometer

A hydrometer is an instrument used to measure the specific gravity (or relative density) of liquids;…

An illustration of a Geissler pump. A pump is a device used to move fluids, such as gases, liquids or slurries. A pump displaces a volume by physical or mechanical action. One common misconception about pumps is the thought that they create pressure. Pumps alone do not create pressure they only displace fluid causing a flow. Adding resistance to flow causes pressure.

Geissler Pump

An illustration of a Geissler pump. A pump is a device used to move fluids, such as gases, liquids or…

An illustration of a Geissler pump. A pump is a device used to move fluids, such as gases, liquids or slurries. A pump displaces a volume by physical or mechanical action. One common misconception about pumps is the thought that they create pressure. Pumps alone do not create pressure they only displace fluid causing a flow. Adding resistance to flow causes pressure.

Geissler Pump

An illustration of a Geissler pump. A pump is a device used to move fluids, such as gases, liquids or…

The Sprengel pump is a vacuum pump invented by Hanover-born chemist Hermann Sprengel in 1865 while he was working in London. The pump could be run continuously and without any supervision to achieve the lowest vacuum achievable at that time.

Sprengel Pump

The Sprengel pump is a vacuum pump invented by Hanover-born chemist Hermann Sprengel in 1865 while he…

The Sprengel pump is a vacuum pump invented by Hanover-born chemist Hermann Sprengel in 1865 while he was working in London. The pump could be run continuously and without any supervision to achieve the lowest vacuum achievable at that time.

Sprengel Pump

The Sprengel pump is a vacuum pump invented by Hanover-born chemist Hermann Sprengel in 1865 while he…

"A vertical rod, generally of iron, with a heavy metallic foot, and a number of metallic rings, of different sizes ... the whole serves to support a retort or other vessel, properly adjusted as to height, over a lamp-flame." -Whitney, 1911

Retort Stand

"A vertical rod, generally of iron, with a heavy metallic foot, and a number of metallic rings,…