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This is a hydraulic weighing scale were the object is placed on a base and later water is filled into the vessel to accurately measure the objects weight.

Weighing Scale

This is a hydraulic weighing scale were the object is placed on a base and later water is filled into…

Scales found at Pompeii

Scales

Scales found at Pompeii

"Ganoid scales of Dapedius." — Encyclopedia Britannica, 1893

Scales

"Ganoid scales of Dapedius." — Encyclopedia Britannica, 1893

An illustration of a lever scale.

Lever Scales

An illustration of a lever scale.

"This distance should be thought of not as three inches but as a foot divided into inches and eighths of inches. It is noticed that this foot is divided with the zero on the inside, the inches running to the left and the feet to the right, so that dimensions given in feet and inches may be read directly, as 1 ft. 0 1/2"." —French, 1911

Scaling Drawing with Ruler

"This distance should be thought of not as three inches but as a foot divided into inches and eighths…

These placoid scales are found in cartilaginous fishes. They are also called dermal denticles. These scales do not grow in size, more are simply added as the fish grows larger.

Placoid Scales of a Shark

These placoid scales are found in cartilaginous fishes. They are also called dermal denticles. These…

<i>Cyclodus gigas</i>. "They are harmless creatures, some inches long, natives mostly of warm countries, will small, sometimes rudimentary limbs, and generally smooth scales." &mdash;Whitney, 1889 <p>This illustration features a skink crawling on rocks with grass in the background.

Skink, Giant Cyclodus

Cyclodus gigas. "They are harmless creatures, some inches long, natives mostly of warm countries, will…

An illustration of a price computing spring weighing machine.

Spring Weighing Machine

An illustration of a price computing spring weighing machine.

"A remarkable family of flying rodents of Africa; the scale-tailed squirrels."-Whitney, 1902

Scale-Tailed Squirrel

"A remarkable family of flying rodents of Africa; the scale-tailed squirrels."-Whitney, 1902

"The Steelyard is more portable then the ordinary balance. It consists of a lever, AB, moving round a knife-edge or point at C. The body to be weighed, W, is put into the scale which hangs from A; and a movable weight P, is made to slide along the longer arm, until the lever, AB, remains horizontal." &mdash; Chambers' Encyclopedia, 1875

Steelyard

"The Steelyard is more portable then the ordinary balance. It consists of a lever, AB, moving round…

"Three temperature scales compared against one another." -Comstock 1850

Temperature Scale

"Three temperature scales compared against one another." -Comstock 1850

Shows the differences between the Centigrade and absolute (Kelvin) temperature scales at the boiling point of water, room temperature, freezing point of water, boiling point of hydrogen and absolute zero.

Temperature Scales

Shows the differences between the Centigrade and absolute (Kelvin) temperature scales at the boiling…

"A cubic centimeter of water weighs 1 gram." &mdash; Avery, 1895

Water and scale

"A cubic centimeter of water weighs 1 gram." — Avery, 1895

"Take a piece of ivory, or any other substance that will sink in water, and weigh it accurately in the usual manner; then suspend it by a thread, or hair, in the empty cup a, and balance it. Now pour water into the cup, and it will be found that the suspended body will lose a part of its weight, so that a certain number of grains must be taken from the opposite scale, in order to make the scales balance as before the water was poured in. The number of grains taken from the opposite scale, show the weight of a quantity of water equal to the bulk of the body so suspended." &mdash;Comstock, 1850

Water Weighing

"Take a piece of ivory, or any other substance that will sink in water, and weigh it accurately in the…

An illustration of a price computing weighing machine.

Price Computing Weighing Machine

An illustration of a price computing weighing machine.

An illustration of a price computing weighing machine using an even even balance and pendulum.

Price Computing Weighing Machine

An illustration of a price computing weighing machine using an even even balance and pendulum.

An illustration of a woman holding a scale with a man.

Woman Holding Scale with Man

An illustration of a woman holding a scale with a man.

"Saxe-Gothea conspicua; 1. male spike; 2. anther; 3. scale of galbulus with ovule; 4. ripe galbulus." -Lindley, 1853

Prince Albert's Yew

"Saxe-Gothea conspicua; 1. male spike; 2. anther; 3. scale of galbulus with ovule; 4. ripe galbulus."…