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"The Long-clawed Crab is remarkable for its long antennae, which considerably exceed the length of the body."

Corystes Cassivelaunus, male

"The Long-clawed Crab is remarkable for its long antennae, which considerably exceed the length of the…

"The anterior feet are about the length of the body. The other feet terminate in an elongated claw, which is straight-pointed."

Corystes Cassivelaunus, female

"The anterior feet are about the length of the body. The other feet terminate in an elongated claw,…

"The Trunk-fish, or Ostracion, is without scales, but covered with regular, osseous plates, which are so jointed the one to the other that the body is, as it were, inclosed in a kind of box or long coffer."

The Trunkfish (Ostracion)

"The Trunk-fish, or Ostracion, is without scales, but covered with regular, osseous plates, which are…

"The tube of the muzzle is long and flat, and from the caudal fin springs a terminal filament nearly as long as the body. This species of pipe-fish is common around the Antilles."

The Pipefish (Fistularia Tabacaria)

"The tube of the muzzle is long and flat, and from the caudal fin springs a terminal filament nearly…

"The Common Plaice attains a length of twelve to eighteen inches. On the eye side of the head are some osseous tubercles; the body is smooth."

The Common Plaice (Platessa Vulgaris)

"The Common Plaice attains a length of twelve to eighteen inches. On the eye side of the head are some…

"The body of the Edible Frog sometimes attains a length, from the extremity of the muzzle to the end of the hind feet, of six to eight inches."

The Edible Frog

"The body of the Edible Frog sometimes attains a length, from the extremity of the muzzle to the end…

"The external air penetrates into every part of their body by the respiratory tubes, which ramify the whole cellular tissue. Wings alone would fail to support the bird."

Skeleton of the Swan

"The external air penetrates into every part of their body by the respiratory tubes, which ramify the…

"The external air penetrates into every part of their body by the respiratory tubes, which ramify the whole cellular tissue. Wings alone would fail to support the bird."

Respiratory Organs of a Pigeon

"The external air penetrates into every part of their body by the respiratory tubes, which ramify the…

"The external air penetrates into every part of their body by the respiratory tubes, which ramify the whole cellular tissue. Wings alone would fail to support the bird."

Lungs of a Pigeon

"The external air penetrates into every part of their body by the respiratory tubes, which ramify the…

"From the head, backward to the tail, the body feathers increase in strength and size, also alter in form; those on the face, or around the base of the bill, being the smallest, the tail coverts longest."

Neck-Covert

"From the head, backward to the tail, the body feathers increase in strength and size, also alter in…

"From the head, backward to the tail, the body feathers increase in strength and size, also alter in form; those on the face, or around the base of the bill, being the smallest, the tail coverts longest."

Tail-Covert

"From the head, backward to the tail, the body feathers increase in strength and size, also alter in…

"Narrow channels, firths and bays are its favorite resorts. There it floats, the body deeply submerged in the water."

Great Northern Diver (Colymbus Glacialis)

"Narrow channels, firths and bays are its favorite resorts. There it floats, the body deeply submerged…

"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…

"The thorax, the second primary division of the body of insects, plays almost as important a part as the head."

Thorax of Acrocinus Longimanus

"The thorax, the second primary division of the body of insects, plays almost as important a part as…

"The common Flea has an oval body, somewhat flattened, and covered with a rather horay skin."

Flea (Pulex Irritans)

"The common Flea has an oval body, somewhat flattened, and covered with a rather horay skin."

"The Head-louse is an insect with a flat body, slightly transparent, and of a grayish color."

Louse (Pediculus Capitis)

"The Head-louse is an insect with a flat body, slightly transparent, and of a grayish color."

"The larva makes a small tunnel in the sand, having a conical mouth, where it waits, like the spider, immovable. As soon as an insect falls into the hole, it raises its head, and squeezing its prey in the folds of its body, devours it."

Vermilea de Geeri

"The larva makes a small tunnel in the sand, having a conical mouth, where it waits, like the spider,…

Round head and flat head screws compared.

Wood Screws

Round head and flat head screws compared.

Flat head screw countersunk (set flush) into wood.

Wood Screw Countersunk

Flat head screw countersunk (set flush) into wood.

Front view of a man in the anatomical position. On one lateral half the parts are labeled in English, on the other in Latin. The right upper limb is drawn away from the trunk in the order to show the arm more fully than is possible when it hangs perpendicularly.

Front View of the Parts of the Human Body Labeled in English and Latin

Front view of a man in the anatomical position. On one lateral half the parts are labeled in English,…

Back view of a man. On one lateral the names of the parts are given in English, on the other in Latin.

Back View of the Parts of the Human Body Labeled in English and Latin

Back view of a man. On one lateral the names of the parts are given in English, on the other in Latin.

"It is this little insect which furnishes, when its body has been dried and reduced to powder, a coloring matter of a beautiful red, peculiar to itself."

Cochineal Insects, Male (Coccus Cacti)

"It is this little insect which furnishes, when its body has been dried and reduced to powder, a coloring…

"It is this little insect which furnishes, when its body has been dried and reduced to powder, a coloring matter of a beautiful red, peculiar to itself."

Cochineal Insects, Female (Coccus Cacti)

"It is this little insect which furnishes, when its body has been dried and reduced to powder, a coloring…

The engraved illustration of the Fall of Lucifer from the block book, Speculum Humanae Salvationis (Mirror of Human Salvation).

Speculum Humanae Salvationis

The engraved illustration of the Fall of Lucifer from the block book, Speculum Humanae Salvationis (Mirror…

The human skeleton.

The Human Skeleton

The human skeleton.

"Their attitudes deceive even the close observer; they embrace the stem of the leaf or twig with their hinder or intermediate legs, whilst the rest of their body, vertically elevated, remans stiff and immovable for hours together."

Caterpillar of the Canary-Shouldered Thorn

"Their attitudes deceive even the close observer; they embrace the stem of the leaf or twig with their…

"When the caterpillar wants to gnaw the edge of a leaf, it twists its body in such a way that at least one portion of the edge of the leaf is held between its legs, while the insect's jaws cut the leaf."

Looper Caterpillar Eating the Leaves of the Apricot (After Reaumur)

"When the caterpillar wants to gnaw the edge of a leaf, it twists its body in such a way that at least…

"In this early state one recognizes the head, which is then resting on the thorax; the two eyes and the antennae, which are brought forward like two ribbons; the wings are also brought over the thorax, but these are separated artificially in the drawing we have given; and lastly, in the space left between the wings, the six legs and the body of the insect."

Chrysalis of the Large Tortoise Shell Butterfly (Vanessa Polychloros)

"In this early state one recognizes the head, which is then resting on the thorax; the two eyes and…

The human skeleton.

The Human Skeleton

The human skeleton.

"When the insect is at rest, the first two rings of its body taper in such a way as to resemble the snout of a pig."

Larva of Deilephila (Chaerocampa) Nerii

"When the insect is at rest, the first two rings of its body taper in such a way as to resemble the…

Section of the head through the body of the mandible.

Cross Section of Head Through the Body of the Mandible

Section of the head through the body of the mandible.

The side view of a human neck.

Neck

The side view of a human neck.

Section through the body of the liver at the level of the arch of the seventh rib anteriorly.

Cross Section of the Trunk through the Liver

Section through the body of the liver at the level of the arch of the seventh rib anteriorly.

Section of mucous membrane lining body of uterus (decidua vera); fourth month of pregnancy.

Mucous Membrane of Uterus in Fourth Month of Pregnancy

Section of mucous membrane lining body of uterus (decidua vera); fourth month of pregnancy.

Section of human placenta at end of pregnancy. The fetal blood vessels have been injected; the maternal blood spaces appear as clear areas surrounding the sections of the fetal villi.

Section of Placenta

Section of human placenta at end of pregnancy. The fetal blood vessels have been injected; the maternal…

"The female is smaller than the male, and has a longer body than the working bee; the wings are shorter in proportion. The only part she has to play is that of laying eggs, so she has no palettes and brushes."

Female or Queen Bee (Apis Mellifica)

"The female is smaller than the male, and has a longer body than the working bee; the wings are shorter…

"Its body is transparent, the head and wings can be made out, but no legs. The mouth is a retractible nipple."

Larva of the Red Ant (Myrmica Rubra)

"Its body is transparent, the head and wings can be made out, but no legs. The mouth is a retractible…

"The workers are one fifth of an inch long; the body soft and of extreme delicacy, but the sharp mandibles are capable of attacking the hardest bodies."

Termes Lucifugus, Worker

"The workers are one fifth of an inch long; the body soft and of extreme delicacy, but the sharp mandibles…

Nerve cells of human spinal cord stained to show Nissl bodies. Labels: D, dendrites; A, axons; C, implantation cone; N, nucleus; M, nucleolus.

Neuron of Spinal Cord

Nerve cells of human spinal cord stained to show Nissl bodies. Labels: D, dendrites; A, axons; C, implantation…

Reconstruction of peripheral nerves of human embryo of five weeks.

Peripheral Nerves of Human Embryo

Reconstruction of peripheral nerves of human embryo of five weeks.

Section of human cornea.

Section of Cornea

Section of human cornea.

The hymenium or tissue layer of the agaric of a mushroom.

Agaric Hymenium

The hymenium or tissue layer of the agaric of a mushroom.

Frozen section across body at level of twelfth thoracic vertebra.

Section Across Trunk

Frozen section across body at level of twelfth thoracic vertebra.

A natural fountain of water springing out of a body of water.

Fountain

A natural fountain of water springing out of a body of water.

A human eye, used for sight, pictured with an eyebrow.

Eye

A human eye, used for sight, pictured with an eyebrow.

An anchor is an object, often made out of metal, that is used to attach a ship to the bottom of a body of water at a specific point.

Anchor

An anchor is an object, often made out of metal, that is used to attach a ship to the bottom of a body…

The hand is the intricate, multi-fingered body part normally located at the end of each arm of a human.

Hand Pointing

The hand is the intricate, multi-fingered body part normally located at the end of each arm of a human.

Section of thymus body of man of twenty eight, showing invasion and replacement of thymus tissue by fat.

Thymus Showing Replacement of Thymus Tissue by Fat

Section of thymus body of man of twenty eight, showing invasion and replacement of thymus tissue by…

In human anatomy, the ureters are muscular tubes that propel urine from the kidneys to the urinary bladder.

Transverse Section of Ureter

In human anatomy, the ureters are muscular tubes that propel urine from the kidneys to the urinary bladder.

General view of the human skeleton.

Skeleton

General view of the human skeleton.

Cross section of developing bone of human fetus of four months. Labels: a, periostem; b, boundary between endochondral and periosteal bone; c, perichondral bone; d, remains of area of calcification; e, endochondral bone; f, f', blood vessels; g, g', developing Haversian spaces; h, marrow; i, blood vessels.

Developing Bone

Cross section of developing bone of human fetus of four months. Labels: a, periostem; b, boundary between…

Osteoblasts from the parietal bone of a human embryo thirteen weeks old. Labels: a, bony septa with the cells of he lacunae; b, layers of osteoblasts; c, the latter in transition to bone corpuscles.

Osteoblasts from Embryo

Osteoblasts from the parietal bone of a human embryo thirteen weeks old. Labels: a, bony septa with…

The human flea (Pulex irritans) is a parasitic insect that actually has several hosts despite its name.

Human Flea

The human flea (Pulex irritans) is a parasitic insect that actually has several hosts despite its name.

"The branch vascular bundles will be distinctly seen, resembling in some respects the arteries and veins of the human body. A careful examination will show that these are also covered with a very fine lace-work of cells under and over them, and interspersed among the latter will be seen a vast assemblage of translucent dottings, each having an opening across it corresponding to those of the stomates under which they were situated before dissection." -Watts, 1874

Microscopic view of a leaf

"The branch vascular bundles will be distinctly seen, resembling in some respects the arteries and veins…

The body is enclosed in a glassy shell composed of flint. The shell is perforated by numerous holes through which the pseudopodia are emitted, and it is usually of extreme beauty, being sculptured in various ways, and often adorned with spines.

Haliomma Hexacanthum

The body is enclosed in a glassy shell composed of flint. The shell is perforated by numerous holes…

"These fragile creatures are able to make long voyages on the surface of the sea. Their nature is such that they are required to keep constantly moving in order to sustain themselves in the fluid which they inhabit. There is a double movement of their light skeletons, which may be compared to the action of respiration in the human hest."

Rhyzostoma Cuvierii

"These fragile creatures are able to make long voyages on the surface of the sea. Their nature is such…

This experiment illustrates the law of action and reaction, which asserts that momentum cannot be imparted to any body without equal and opposite momentum being imparted to some other body.

Backward Movement of Discharging Vessel

This experiment illustrates the law of action and reaction, which asserts that momentum cannot be imparted…

One of the commonest ways of determining the density of a solid body is to weight it first in air and then in water.

Specific Gravity of Solids

One of the commonest ways of determining the density of a solid body is to weight it first in air and…

"The Blue Minyad is a type of a family in which the base of the body, in place of extending itself in a disk-like form, in order to grapple with the rocks and other projections at the bottom of the sea, turns itself inward, forming a sort of purse, which seems to imprison the air. From this results a sort of hydrostatic apparatus, aided by which the animals can float in the water and transport themselves from one place to another."

Blue Minyad (Minyas Cyanea)

"The Blue Minyad is a type of a family in which the base of the body, in place of extending itself in…

"The species shown in this figure has a simple, cylindrical body, without branchiae, and a rudimentary polypidom furnished with very large polyps of a whitish color."

Veretillum Cynomorium (Lamarck)

"The species shown in this figure has a simple, cylindrical body, without branchiae, and a rudimentary…