A diagram showing 3-volt scale connected across a circuit.

3-Volt Scale

A diagram showing 3-volt scale connected across a circuit.

A diagram showing 30-volt scale connected across storage battery terminals.

30-Volt Scale

A diagram showing 30-volt scale connected across storage battery terminals.

"States that: A body when immersed in a fluid loses exactly as much of its weight as is equal to the weight of the dluid it displaces; or: A fluid sustains as mch of the weight of a body immersed in it as is equal to the weight of the fluid displaced by it." — Chambers' Encyclopedia, 1875

Archimedes Principle

"States that: A body when immersed in a fluid loses exactly as much of its weight as is equal to the…

"From one end of a scale-beam, suspend a cylindrical metal bucket, b, with a solid cylinder, a, that fits accurately into it hanging below. Conterpoise with weights (shot or sand) in the opposite scale-pan. Immerse a in water, and the counterpoise will descend, as if a had lost some of its weight. Carefully fill b with water. It will hold exactly the quantity displaced by a. Equilibrium will be restored." -Avery 1895

Archimedies Principle

"From one end of a scale-beam, suspend a cylindrical metal bucket, b, with a solid cylinder, a, that…

Scales are made with different divisions for different purposes. For machine, structural and architectural drawing the architects' scale of proportional feet and inches is used.

The Scale of the Architects

Scales are made with different divisions for different purposes. For machine, structural and architectural…

A balance used for measuring weight.

Balance

A balance used for measuring weight.

"A representation of a common form of the delicate balances employed in physical and chemical researches. the beam is constructed so as to combine lightness with strength, and rests by a fine knife-edge on an agate plane. It is surmounted by a weight moving on a screw, so that the sensibility may be increased or diminished, according as weight is raised or depressed." — Chambers' Encyclopedia, 1875

Balance

"A representation of a common form of the delicate balances employed in physical and chemical researches.…

An illustration of a balance scale.

Balance Scale

An illustration of a balance scale.

"The most accurate method of determining the specific gravity of a mineral is by the use of a chemical balance. To one beam of the balance is suspended a wire basket which is so arranged that it can be immersed in a beaker of water. The basket is hung in the water and then counterbalanced by weights on the opposite pan of the balance. The mineral specimen to be tested, having been first weighed on the balance in the ordinary fashion, is now placed in the basket under the water and weighed again." — Ford, 1912

Chemical balance

"The most accurate method of determining the specific gravity of a mineral is by the use of a chemical…

A weighing apparatus somewhat resembling the steelyard, but differing from it by having the fulcrum movable.

Danish Balance

A weighing apparatus somewhat resembling the steelyard, but differing from it by having the fulcrum…

"Under Side of Worker, carrying Wax Scales." — The Encyclopedia Britannica, 1910

Worker Bee

"Under Side of Worker, carrying Wax Scales." — The Encyclopedia Britannica, 1910

A bucket being used to weigh the milk production of a cow.

Weighing bucket

A bucket being used to weigh the milk production of a cow.

"Noted for being completely covered in horny scales. It is common on all the coasts of Europe and Greenland." — Goodrich, 1859

Armed Bullhead

"Noted for being completely covered in horny scales. It is common on all the coasts of Europe and Greenland."…

"Scales from the wings of a butterfly, <i>Vanessa antiopa</i>, highly magnified. 1. from border of anterior wing, above; 2. from border of anterior wing, below." -Whitney, 1889.

Scales from the Wings of a Butterfly

"Scales from the wings of a butterfly, Vanessa antiopa, highly magnified. 1. from border of anterior…

When the caliper cannot be removed from a thickness, a filler can be used. The distance must be subtracted from the total distance to obtain the desired thickness.

Caliper with Filler

When the caliper cannot be removed from a thickness, a filler can be used. The distance must be subtracted…

Transfer the caliper to a scale to receive measurement.

Reading the Inside Caliper

Transfer the caliper to a scale to receive measurement.

Transfer the caliper to a scale to receive measurement.

Reading the Outside Caliper

Transfer the caliper to a scale to receive measurement.

The transfer caliper is provided with a false leg which is set so that the caliper may be opened and then brought back to the same position after removing from the casting.

Transfer Caliper

The transfer caliper is provided with a false leg which is set so that the caliper may be opened and…

"Scale sporopyll and sporangium of club moss."&mdash;Finley, 1917

Spore of club moss

"Scale sporopyll and sporangium of club moss."—Finley, 1917

"Draw three-inch square. Draw lines AB, BC, DE and EF at 30 degrees. Divide lower side into seven equal parts with the dividers. Draw the vertical lines, and mark divisions on AC with pencil as each line is drawn. Through the division points on top and bottom draw the converging lines using the triangle alone as a straight-edge." &mdash;French, 1911

Drawing Converging Lines

"Draw three-inch square. Draw lines AB, BC, DE and EF at 30 degrees. Divide lower side into seven equal…

Illustration of blueprint used by highway engineers to widen the pavement on the inside of the curve of a road.

Curve in Pavement of Road

Illustration of blueprint used by highway engineers to widen the pavement on the inside of the curve…

"Cupressus sempervirens; 1. a scale of a male cone with pollen; 2. a scale of a female cone with naked ovules; 3. a ripe cone; 4. the same with one of the scales removed." -Lindley, 1853

Mediterranean Cyprus

"Cupressus sempervirens; 1. a scale of a male cone with pollen; 2. a scale of a female cone with naked…

"Place a known weight (say 100 g.) in the scale-pan, and to this weight add the weight of the clevis and the scale-pan, and call the sum the load. Measure the deflection of W caused by the load. Double the load, and measure the deflection thus caused." -Avery 1895

Deflection of Wood Using Known Weights

"Place a known weight (say 100 g.) in the scale-pan, and to this weight add the weight of the clevis…

A small scale used for weighing silver, medicines, etc.

Dotchin

A small scale used for weighing silver, medicines, etc.

"Through the center of the space draw a horizontal and a vertical line, measuring on these lines as diameters lay off a three-inch square. Along the lower side and the upper half of the left side measure 3/8' spaces with the scale. Draw all horizontal lines with the T-square and all vertical lines with the T-square and triangle." &mdash;French, 1911

Drawing Exercise for T-square, Triangle, and Scale

"Through the center of the space draw a horizontal and a vertical line, measuring on these lines as…

Foot of a bald eagle, well suited for grasping fish.

Foot of a Bald Eagle

Foot of a bald eagle, well suited for grasping fish.

<i>Lepidopus caudatus</i>. "1. A fish of the family <i>Lepidopodidae, Lepidopus caudatus,</i>of the Mediterranean and Atlantic shores of Europe, as well as of New Zealand, of a bright silvery color, with a long dorsal and rudimentary anal fin: so called from suggesting by its form the sheath of a sword. Also called a scale fish and a frost fish." &mdash;Whitney, 1889

Scabbard Fish

Lepidopus caudatus. "1. A fish of the family Lepidopodidae, Lepidopus caudatus,of the Mediterranean…

A woman with scales and a cherub.

Government Appointments

A woman with scales and a cherub.

A scene from Hawthorne's "Grandfather's Chair." A young girl is on a large scale, being weighed for her portion in silver.

Grandfather's Chair

A scene from Hawthorne's "Grandfather's Chair." A young girl is on a large scale, being weighed for…

"The type of instrument which resulted from Russian labors. The brass tube, strengthened at the bearing points by a strong truly-turned collars, rotates in the cast-iron cradle g attached to the declination axis. a is the eye-piece fixed in that axis, b the micrometer for reading both scales." &mdash;The Encyclopedia Britannica, 1903

Heliometer

"The type of instrument which resulted from Russian labors. The brass tube, strengthened at the bearing…

"A fish known chiefly by scales, fossil remains of which are found in Old Red Sandstone." &mdash; Williams, 1889

Holoptychius

"A fish known chiefly by scales, fossil remains of which are found in Old Red Sandstone." — Williams,…

Flat pieces of iron that are attached to each one of the horses hoofs.

Modern Horseshoe

Flat pieces of iron that are attached to each one of the horses hoofs.

"Determines the specific gravity of any given liquid. A hollow ball, C, rises to a graduated scale while the solid ball, B, keeps C vertically positioned." &mdash;Quackenbos 1859

Hydrometer

"Determines the specific gravity of any given liquid. A hollow ball, C, rises to a graduated scale while…

An illustration of judge putting a law book on a scale.

Judge

An illustration of judge putting a law book on a scale.

"Asiatic ladybird imported to devour the San Jose scale; larva." &mdash;Davison, 1906

Asiatic Ladybird

"Asiatic ladybird imported to devour the San Jose scale; larva." —Davison, 1906

"Asiatic ladybird imported to devour the San Jose scale; adult." &mdash;Davison, 1906

Asiatic Ladybird

"Asiatic ladybird imported to devour the San Jose scale; adult." —Davison, 1906

This illustration shows a portion of Lepidodendron. Lepidodendron is the generic name of a large and important group of plants  which flourished principally in the Carboniferous period. The outer surface of the bark is marked by lozenge-shaped, scale-like markings, the leaf-cushions. These are arranged in dense spirals, which wind around the stems. Often, the narrow and pointed leaves are found, still adherent; they may also carry cones <i>(lepidostrobi)</i>, which in form somewhat resemble those of the fir. The branches usually fork repeatedly, and were implanted on a massive stem which had a similar external sculpture. Some of these stems have been seen in the roofs of coal workings with a length of a hundred feet. Their roots are generally known as stigmaria. The Lepidodendra belonged to the Lycopodiaceæ, and have their nearest representatives in the diminutive club-mosses, which they resemble even in their superficial characters.

Portion of Lepidodendron

This illustration shows a portion of Lepidodendron. Lepidodendron is the generic name of a large and…

Illustration of an ordinary steel-yard being used as a lever. F represents the fulcrum. Weight P is used to balance weight W.

Steel-yard Used as a Lever

Illustration of an ordinary steel-yard being used as a lever. F represents the fulcrum. Weight P is…

"A balance, a pair of scales. The principal parts of this instrument were: 1. The beam. 2. The two scales, called in Latin lances. The beam was made without a tongue, being held by a ring or other appendage, fixed in the centre. The annexed woodcut represents Mercury and Apollo engaged in exploring the fates of Achilles and Memnon, by weighing the attendent genius of the one against that of the other." &mdash; Smith, 1873

Libra

"A balance, a pair of scales. The principal parts of this instrument were: 1. The beam. 2. The two scales,…

The Universal Drafting Machine is used in a large drafting room. It combines the functions of T-square, triangle, scale, and protractor to save time in machine drawing and civil engineering work.

Universal Drafting Machine

The Universal Drafting Machine is used in a large drafting room. It combines the functions of T-square,…

Passive nymph or "pupa" of male scale insect.

Passive Nymph

Passive nymph or "pupa" of male scale insect.

A young colonial woman's dower being paid in shillings according to her weight.

A Young Lady's Dower in Pine Tree Shillings

A young colonial woman's dower being paid in shillings according to her weight.

The graduated plumb and level is a type of plumb bob with a scale. It is used to level horizontal or vertical measurements.

Graduating Plumb and Level

The graduated plumb and level is a type of plumb bob with a scale. It is used to level horizontal or…

Illustration of a hydraulic machine. "A principle known as Pascal's Law states that pressure exerted on a liquid in a closed vessel is transmitted equally and undiminished in all directions." If a, A, p, and P respectively represent the areas and pressures, then the following proportion holds: a:A = p:P.

Hydraulic Machine Exerting Pressure

Illustration of a hydraulic machine. "A principle known as Pascal's Law states that pressure exerted…

"Arrangement of scales in the Roach (Leuciscus rutilus). L, Lateral line; t r, transverse line; a, transverse line from lateral line to yentral fin." &mdash; Encyclopedia Britannica, 1893

Roach Scale Arrangement

"Arrangement of scales in the Roach (Leuciscus rutilus). L, Lateral line; t r, transverse line; a, transverse…

<i>Pristis pectinatus</i>. "1. An elasmobranchiate or selachian fish of the family <i>Pristidae</i>, having the snout prolonged into a flat saw or serra beset on each side with horizontal teeth pointing sidewise." &mdash;Whitney, 1889

Sawfish, Side View

Pristis pectinatus. "1. An elasmobranchiate or selachian fish of the family Pristidae, having the snout…

<i>Pristis pectinatus</i>. "1. An elasmobranchiate or selachian fish of the family <i>Pristidae</i>, having the snout prolonged into a flat saw or serra beset on each side with horizontal teeth pointing sidewise." &mdash;Whitney, 1889

Sawfish, View from Underneath

Pristis pectinatus. "1. An elasmobranchiate or selachian fish of the family Pristidae, having the snout…

The scale bugs, or bark lice, are very injurious to trees: some of them are among the worst pests of the fruit grower. These scale are on Osage Orange.

Scale

The scale bugs, or bark lice, are very injurious to trees: some of them are among the worst pests of…

An instrument used to determine the weight of an object.

Scale

An instrument used to determine the weight of an object.

"Cycloid scale of Scopelus resplendens." &mdash; Encyclopedia Britannica, 1893

Scale

"Cycloid scale of Scopelus resplendens." — Encyclopedia Britannica, 1893

"Cycloid scale of Gobius ommaturus." &mdash; Encyclopedia Britannica, 1893

Scale

"Cycloid scale of Gobius ommaturus." — Encyclopedia Britannica, 1893

"Cycloid scale from the lateral line of Odax linealus." &mdash; Encyclopedia Britannica, 1893

Scale

"Cycloid scale from the lateral line of Odax linealus." — Encyclopedia Britannica, 1893

"A common scale-beam, used for weighing, is a lever, suspended at the centre of gravity, so that the two arms balance each other. Hence the machine is called a balance. The fulcrum, or what is called the pivot, is sharpended, like a wedge, and made of hardened steel, so as much as possible to avoid friction." -Comstock 1850

Scale

"A common scale-beam, used for weighing, is a lever, suspended at the centre of gravity, so that the…

"Male San Jose scale insect." &mdash;Davison, 1906

Scale Insect

"Male San Jose scale insect." —Davison, 1906

The male cottony cushion scale insect is winged.

Cottony Scale

The male cottony cushion scale insect is winged.

A scale used for weighing milk.

Milk Scale

A scale used for weighing milk.

A system of ordered marks at fixed intervals used as a reference standard in measurement

Scientific Scale

A system of ordered marks at fixed intervals used as a reference standard in measurement

A measure of the heaviness of an object.

Scientific Type Scale

A measure of the heaviness of an object.

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