"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." — 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." — 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." —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."…