A balance with three apples on the left and 15 blocks on the right.

Balance with Apples and Blocks

A balance with three apples on the left and 15 blocks on the right.

A balance with two blocks and a slice of cake on the left and three one-unit blocks and one 25-unit block on the right.

Balance with Cake and Blocks

A balance with two blocks and a slice of cake on the left and three one-unit blocks and one 25-unit…

A balance with nothing on either side.

Balance with Empty Pans

A balance with nothing on either side.

"Fagus sylvatica; 1. male catkins; 2. female do.; 3. the latter, with the scales of the involucre stripped off to show the ovaries at the apex; 4. a male flower; 5. a half-grown male with the involucre, now consisting of consolidated scales, forced back; 6. a ripe involucre opening and exposing the nuts; 7. a transverse section of a ripe nut; 8. the same of a young ovary." -Lindley, 1853

Common Beech

"Fagus sylvatica; 1. male catkins; 2. female do.; 3. the latter, with the scales of the involucre stripped…

"Thuja orientalis; 1. a magnified fragment of a branch bearing a cone of male flowers; 2. a portion of a female branch; 3, 4. scales with naked ovules; 5. a vertical section of a ripe seed." -Lindley, 1853

Biota

"Thuja orientalis; 1. a magnified fragment of a branch bearing a cone of male flowers; 2. a portion…

"Scutellate. Foot of bluebird, with laminiplantar and mostly booted tarsus and of the toes." -Whitney, 1911

Bluebird Foot

"Scutellate. Foot of bluebird, with laminiplantar and mostly booted tarsus and of the toes." -Whitney,…

Fishes are sometimes classed, in accordance with the structure of their scale, into Ctenoid, Ganoid, Cycloid, and Placoid. This illustration is a Cycloid scale of the Carp.

Cycloid Scale of the Carp

Fishes are sometimes classed, in accordance with the structure of their scale, into Ctenoid, Ganoid,…

"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…

Fishes are sometimes classed, in accordance with the structure of their scale, into Ctenoid, Ganoid, Cycloid, and Placoid. This illustration is Ganoid scales of Dipterus.

Ganoid Scales of Dipterus

Fishes are sometimes classed, in accordance with the structure of their scale, into Ctenoid, Ganoid,…

"Corolla, scales and stamens of, 1. Cuscuta europaea; 2. Cuscuta trifolii." -Lindley, 1853

Greater Dodder

"Corolla, scales and stamens of, 1. Cuscuta europaea; 2. Cuscuta trifolii." -Lindley, 1853

Outline of a fish, showing the "paired" and "median" fins. (p) one of the pectoral fins; (v) one of the ventral fins; (d) first dorsal fin; (d') second dorsal fin; (a) anal fin; (c) caudal fin.

Fish

Outline of a fish, showing the "paired" and "median" fins. (p) one of the pectoral fins; (v) one of…

Justice

Justice

Justice

"Scutelliplantar foot of horned lark: the tarsus scutellate before and behind, and the toes all scutellate on top." -Whitney, 1911

Lark Foot

"Scutelliplantar foot of horned lark: the tarsus scutellate before and behind, and the toes all scutellate…

The Eastern fence lizard (Sceloporus undulatus) is a medium sized species of lizard common along the east coast of North America.

Eastern Fence Lizard

The Eastern fence lizard (Sceloporus undulatus) is a medium sized species of lizard common along the…

The long-tailed pangolin (Manis tetradactyla) are known as scaly anteaters because of the large keratin scales used for defense.

Long-Tailed Pangolin

The long-tailed pangolin (Manis tetradactyla) are known as scaly anteaters because of the large keratin…

"Relief. Over the door of "The Public Scales," Nuremberg. By Adam Kraft." —D'Anvers, 1895

Relief

"Relief. Over the door of "The Public Scales," Nuremberg. By Adam Kraft." —D'Anvers, 1895

The red scale of California is a parasitic insect that sucks sap from the plant it lives on.

Scale

The red scale of California is a parasitic insect that sucks sap from the plant it lives on.

An adult female scale

Scale

An adult female scale

The adult female scale forms a wax covering under which she remains.

Scale

The adult female scale forms a wax covering under which she remains.

The larvae of a scale

Scale

The larvae of a scale

An adult male scale

Scale

An adult male scale

"Scale-insect. Oyster-shell bark-louse of the apple (Mytilaspis pomorum); male. a, ventral view with wings closed; b, dorsal view with wings expanded; c, scale (line shows natural size); d, leg; f, antennal joint." -Whitney, 1911

Scale Insect

"Scale-insect. Oyster-shell bark-louse of the apple (Mytilaspis pomorum); male. a, ventral view with…

Fishes are sometimes classed, in accordance with the structure of their scale, into Ctenoid, Ganoid, Cycloid, and Placoid. This illustration is Placoid scale of Ray.

Placoid Scale of Ray

Fishes are sometimes classed, in accordance with the structure of their scale, into Ctenoid, Ganoid,…

Fishes are sometimes classed, in accordance with the structure of their scale, into Ctenoid, Ganoid, Cycloid, and Placoid. This is an illustration of a Ctenoid Scale of the Perch.

Ctenoid, Scale

Fishes are sometimes classed, in accordance with the structure of their scale, into Ctenoid, Ganoid,…

"a, Scales of Chionaspis pinifoliae upon pine-leaves, natural size; b, scale of male, enlarged; c, straight scale of female, enlarged; d, curved scale of female, enlarged." -Whitney, 1911

Pine Needle Scale

"a, Scales of Chionaspis pinifoliae upon pine-leaves, natural size; b, scale of male, enlarged; c, straight…

A variety of leaves with scales: "a, the scale-like leaves of the stem of Lathraea squamaria (toothwort); b, the cone with the scales of Cupressus sempervirens (Mediterranean Cypress); c, the imbricate scale-like bract of the spike of Cyperus longus (common galingale)." -Whitney, 1911

Scaled Leaves

A variety of leaves with scales: "a, the scale-like leaves of the stem of Lathraea squamaria (toothwort);…

Scales found at Pompeii

Scales

Scales found at Pompeii

Scales used for coining.

Scales

Scales used for coining.

Five students are learning how to use scales to measure a book. They have balanced the book with some weights.

Children Using Scales

Five students are learning how to use scales to measure a book. They have balanced the book with some…

Scales of fishes; cycloid scale (Pike).

Fish Scales

Scales of fishes; cycloid scale (Pike).

Scales of fishes; Ctenoid scale (Perch)

Fish Scales

Scales of fishes; Ctenoid scale (Perch)

Scales of fishes; Placoid scale (Thornback)

Fish Scales

Scales of fishes; Placoid scale (Thornback)

Scales of fishes; Ganoid Scale (Palaeoniscus)

Fish Scales

Scales of fishes; Ganoid Scale (Palaeoniscus)

The sector is a hinged rule with scales used for various mathematical calculations.

Sector

The sector is a hinged rule with scales used for various mathematical calculations.

Skeleton of the common Perch. (p) one of the pectoral fins; (v) one of the ventral fins; (a) anal fin, (c) caudal fin; (d) first dorsal fin; (d) second dorsal fin; (i i ) interspinous bones.

Fish Skeleton

Skeleton of the common Perch. (p) one of the pectoral fins; (v) one of the ventral fins; (a) anal fin,…

Personification of law and justice

Themis

Personification of law and justice

"Thermometers showing the corresponding points for water's freezing and boiling." -Avery 1895

Fahrenheit and Celcius scale Thermometers

"Thermometers showing the corresponding points for water's freezing and boiling." -Avery 1895

Treasury Department seal

Treasury Department seal

Treasury Department seal