Early stages in development of human brain. 1, 2, 3, are from an embryo about seven weeks old; 4, about three months old. m, middle cerebral vesicle (mesencephalon); c, cerebellum; m o, medulla oblongata; i, thalamencephalon; h, hemispheres; i', infundibulum; Fig. 3 shows the several curves which occur in the course of development; Fig. 4 is a lateral view, showing the great enlargement of the cerebral hemispheres which have covered in the thalami, leaving the optic lobes, m, uncovered.

Development of the Brain

Early stages in development of human brain. 1, 2, 3, are from an embryo about seven weeks old; 4, about…

Side view of fetal brain at six months, showing commencement of formation of the principal fissures and convolutions. F, frontal lobe; P, parietal; O, occipital; T, temporal; a, commencing frontal convolutions; s, Sylvian fissure; s', its anterior division; c, within it the central lobe or island of Reil; r, fissure of Rolando; p, perpendicular fissure.

Fetal Brain at Six Months

Side view of fetal brain at six months, showing commencement of formation of the principal fissures…

A thin diaphanous shell in which species of the genus Limnaea live. They can be found in the fresh waters of most countries.

Limnaea Stagnalis (Linnaeus)

A thin diaphanous shell in which species of the genus Limnaea live. They can be found in the fresh waters…

Common form of bank draft, or check for five hundred dollars.

Bank Draft

Common form of bank draft, or check for five hundred dollars.

"Dipping needle, a magnetic needle mounted on a horizontal support, and free to move in a vertical plane. The dipping needle is used to test the force of the earth's magnetism at different places on its surface." -Foster, 1921

Dipping Needle

"Dipping needle, a magnetic needle mounted on a horizontal support, and free to move in a vertical plane.…

"The Staircase-shell is recognized by its deep umbilicus, wide and funnel-shaped, in the interior of which may be seen the little teeth which follow the edge of every turn of the spiral up to the top. The diameter of this shell is sometimes two and a half inches."

Solarium Perpectivum (Bottom View)

"The Staircase-shell is recognized by its deep umbilicus, wide and funnel-shaped, in the interior of…

"The Staircase-shell is recognized by its deep umbilicus, wide and funnel-shaped, in the interior of which may be seen the little teeth which follow the edge of every turn of the spiral up to the top. The diameter of this shell is sometimes two and a half inches."

Solarium Perpectivum (Side View)

"The Staircase-shell is recognized by its deep umbilicus, wide and funnel-shaped, in the interior of…

"The Money Cowry is a little, oval shell, depressed, flat below, with very thick edges and slightly waving. It comes from the Indian ocean, and is sometimes found in the Atlantic."

Cypraea Moneta (Linnaeus)

"The Money Cowry is a little, oval shell, depressed, flat below, with very thick edges and slightly…

A cud-chewing animal of the Old World, especially adapted by nature to travel waste deserts with scarcity of food and water. Pictured: dromedary and two-humped camel.

Dromedary, two-humped camel

A cud-chewing animal of the Old World, especially adapted by nature to travel waste deserts with scarcity…

An illustration of the legend of Alfred the Great letting the cakes burn because he was preoccupied with thoughts of his kingdom.

Alfred the Great

An illustration of the legend of Alfred the Great letting the cakes burn because he was preoccupied…

A poster with facts and images of England to the Norman Conquest.

England Poster

A poster with facts and images of England to the Norman Conquest.

"The Volutes live in the sands near the shore; sometimes they are found high and dry, left by the retreating tide."

Voluta Undulata (Lamarck)

"The Volutes live in the sands near the shore; sometimes they are found high and dry, left by the retreating…

"The Volutes live in the sands near the shore; sometimes they are found high and dry, left by the retreating tide."

Voluta Cymbium (Linnaeus)

"The Volutes live in the sands near the shore; sometimes they are found high and dry, left by the retreating…

"The Volutes live in the sands near the shore; sometimes they are found high and dry, left by the retreating tide."

Voluta Delessertii (Petit)

"The Volutes live in the sands near the shore; sometimes they are found high and dry, left by the retreating…

"The Volutes live in the sands near the shore; sometimes they are found high and dry, left by the retreating tide."

Voluta Musica (Linn.)

"The Volutes live in the sands near the shore; sometimes they are found high and dry, left by the retreating…

"The Volutes live in the sands near the shore; sometimes they are found high and dry, left by the retreating tide."

Voluta Imperialis (Lamarck)

"The Volutes live in the sands near the shore; sometimes they are found high and dry, left by the retreating…

"The Volutes live in the sands near the shore; sometimes they are found high and dry, left by the retreating tide."

Voluta Scapha (Gmel.)

"The Volutes live in the sands near the shore; sometimes they are found high and dry, left by the retreating…

"The Volutes live in the sands near the shore; sometimes they are found high and dry, left by the retreating tide."

Voluta Vexillum (Chem.)

"The Volutes live in the sands near the shore; sometimes they are found high and dry, left by the retreating…

An upclose view of the arm of a Sepia Tuberculosa.

Arm of Sepia Tuberculosa (Lamarck)

An upclose view of the arm of a Sepia Tuberculosa.

"Cuttlefish are probably the most interesting animals of [the cephalopoda] order. They live for five or six years, and lay eggs, which are large and generally found in clusters, and are known to fishermen as sea-grapes."

Sepia Officinalis (Linnaeus)

"Cuttlefish are probably the most interesting animals of [the cephalopoda] order. They live for five…

"The Common Calmar or Squid. They propel themselves backward through the water with great velocity, driving back the water by means of their funnel."

Loligo Vulgaris, with its pen, or internal bone (Lamarck)

"The Common Calmar or Squid. They propel themselves backward through the water with great velocity,…

"A tilting match between two knights." -Foster, 1921

Tilting Match

"A tilting match between two knights." -Foster, 1921

The anti-slavery novel by Harriet Beecher Stowe was published in 1852 and had an effect on the view of slavery.

Uncle Tom's Cabin

The anti-slavery novel by Harriet Beecher Stowe was published in 1852 and had an effect on the view…

A view on upper Saint John's River in Florida.

Saint John's River

A view on upper Saint John's River in Florida.

"The Common Calmar or Squid. They propel themselves backward through the water with great velocity, driving back the water by means of their funnel."

Loligo Gahi (d'Orbigny)

"The Common Calmar or Squid. They propel themselves backward through the water with great velocity,…

"The king of the herrings is from three to four feet in length, of a general silvery color, spotted with brown. It inhabits the North Sea, living on mollusks and crustaceans."

Chimaera Monstrosa (the Arctic chimaera)

"The king of the herrings is from three to four feet in length, of a general silvery color, spotted…

Charlemagne (Charles the Great) was king of the Franks during the Middle Ages.

Charlemagne

Charlemagne (Charles the Great) was king of the Franks during the Middle Ages.

"'Liberty Enlightening the World,' a gift from the French Republic to the Greatest Republic. Height of Statue, 151 feet; of pedestal, 155 feet." -Foster, 1921

Statue of Liberty

"'Liberty Enlightening the World,' a gift from the French Republic to the Greatest Republic. Height…

A poster with facts and images of France from the Consulate to the World War.

Consulate to the World War

A poster with facts and images of France from the Consulate to the World War.

"Francis Joseph I (1830-1916), emperor of Austria and king of Hungary, and next to the last of the Hapsburg rulers." -Foster, 1921

Francis Joseph I

"Francis Joseph I (1830-1916), emperor of Austria and king of Hungary, and next to the last of the Hapsburg…

(1712-1786) King of Prussia from the Hohenzollern dynaasty, known as the founder of Germany's military power.

Frederick II

(1712-1786) King of Prussia from the Hohenzollern dynaasty, known as the founder of Germany's military…

In Longfellow's poem, an angel took King Robert's place and made Robert the royal jester until he admitted he deserved it.

King Robert of Sicily

In Longfellow's poem, an angel took King Robert's place and made Robert the royal jester until he admitted…

A legend of the knight Roland, who fearlessly claimed his rights by taking food and drink straight from Charlemagne's hands at a feast.

Roland

A legend of the knight Roland, who fearlessly claimed his rights by taking food and drink straight from…

Gustavus Vasa hiding out with peasants in the story about the king from "The Red True Story Book" by Andrew Lang.

Gustavus Vasa

Gustavus Vasa hiding out with peasants in the story about the king from "The Red True Story Book" by…

"The Tortoise will continue to live on for six months after it is deprived of its brain."

Skeleton of a Turtle

"The Tortoise will continue to live on for six months after it is deprived of its brain."

"When the female has laid her eggs, the male takes them and piles them on her back." Her skin becomes inflamed until the eggs are absorbed into her skin.

Surinam Toad

"When the female has laid her eggs, the male takes them and piles them on her back." Her skin becomes…

"Salamanders have the honor of appearing prominently in fabulous narratives. The Greeks believed that they could live in fire."

Land-Salamander

"Salamanders have the honor of appearing prominently in fabulous narratives. The Greeks believed that…

"The Great Black-backed Gull is one of the most remarkable among sea-gulls. It is pure white, with a black back.

Great Black-backed Gull

"The Great Black-backed Gull is one of the most remarkable among sea-gulls. It is pure white, with a…

"In France, where they are common, they are called 'king of the quails.'"

Land-Rail

"In France, where they are common, they are called 'king of the quails.'"

The Screamers are inhabitants of South America. They live isolated, in pairs, and are mild and peaceful in their nature.

Horned Screamer (Palamedea Cornuta)

The Screamers are inhabitants of South America. They live isolated, in pairs, and are mild and peaceful…

The Screamers are inhabitants of South America. They live isolated, in pairs, and are mild and peaceful in their nature.

Faithful Kamichi, or Crested Screamer

The Screamers are inhabitants of South America. They live isolated, in pairs, and are mild and peaceful…

"These birds have as distinctive features a short beak, a small head, a round and massive body, bare tarsi, with spurs more or less developed, and a medium-sized back toe."

Pin-Tailed Sand-Grouse

"These birds have as distinctive features a short beak, a small head, a round and massive body, bare…

"Oven-birds live singly or in pairs, in the plains of Chili, Brazil and Guiana."

Furnarius Rufus and Oven-Bird (Synallaxis Frontalis)

"Oven-birds live singly or in pairs, in the plains of Chili, Brazil and Guiana."

"The King Bird of Paradise is a rare bird, a native of the islands of Molucca."

King Bird of Paradise

"The King Bird of Paradise is a rare bird, a native of the islands of Molucca."

"In the first rank of the Warblers stands the Nightingale, celebrated all over the world for its song, which is superior, without any doubt, to that of any other bird."

Nightingales (Philomela Luscinia and Luscinia Philomela)

"In the first rank of the Warblers stands the Nightingale, celebrated all over the world for its song,…

"When pressed by hunger it shows no fear in attacking live animals, which makes it dreaded by the shepherds along the coast of the Mediterranean."

The Fulvous Vulture

"When pressed by hunger it shows no fear in attacking live animals, which makes it dreaded by the shepherds…

"The King-vulture is distinguished from the condor by the collar-ruff which surrounds the neck being slate-colored."

King Vulture (Sarcorhamphus Papa)

"The King-vulture is distinguished from the condor by the collar-ruff which surrounds the neck being…

"Samson Killing the Lion. By Albrecht Dürer. From the wood engraving." -Heath, 1901

Samson Killing the Lion

"Samson Killing the Lion. By Albrecht Dürer. From the wood engraving." -Heath, 1901

"Christ Driving Out the Money-Changers. By Albrecht Dürer. From the 'Little Passions.' Printed from a cast of the original wood-block in the British Museum." -Heath, 1901

Christ Driving Out the Money-Changers

"Christ Driving Out the Money-Changers. By Albrecht Dürer. From the 'Little Passions.' Printed…

Sir Galahad from the painting by George Frederick Watts.

Sir Galahad

Sir Galahad from the painting by George Frederick Watts.

"They are the miners of the vegetable world. The thistle often nourishes them."

Anthomyia Pluvialis

"They are the miners of the vegetable world. The thistle often nourishes them."

Orthographic projection drawing of a candlestick or upright telephone. An orthographic projection is the method of representing the exact form of an object in two or more views on planes generally at right angles to each other, by dropping perpendiculars fro the object to the planes.

Orthographic Projection of Candlestick Telephone

Orthographic projection drawing of a candlestick or upright telephone. An orthographic projection is…

Orthographic projection drawing of an arm-chair. An orthographic projection is the method of representing the exact form of an object in two or more views on planes generally at right angles to each other, by dropping perpendiculars from the object to the planes.

Orthographic Projection of Arm-Chair

Orthographic projection drawing of an arm-chair. An orthographic projection is the method of representing…

Orthographic projection drawing of stairs. An orthographic projection is the method of representing the exact form of an object in two or more views on planes generally at right angles to each other, by dropping perpendiculars fro the object to the planes.

Orthographic Projection of Stairs

Orthographic projection drawing of stairs. An orthographic projection is the method of representing…

The trunk showing rib, iliac crest, and pubis.

Side View of the Bones of the Trunk

The trunk showing rib, iliac crest, and pubis.

Back view of scapula.

Back View of Scapula

Back view of scapula.

Back view of the trunk.

Back View of the Bones of the Trunk

Back view of the trunk.

Side view of pelvis.

Side View of Pelvis

Side view of pelvis.

Back view of the femur.

Back View of the Femur

Back view of the femur.

Back view of muscles of the calf.

Back View of the Muscles of the Calf

Back view of muscles of the calf.