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Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with both axes labeled.

Coordinate Grid With Axes Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with both…

A full body picture of a long-jawed mastodon during the time period of Miocene.

Long-jawed Mastodon

A full body picture of a long-jawed mastodon during the time period of Miocene.

From an archaic Greek vase, a picture of horses and chariots.

Aryan Speaking People, Horses and Chariots

From an archaic Greek vase, a picture of horses and chariots.

The torture of a free mason. Caption below illustration: "They next set my back against a thick board, at each extremity of which was pulley; through which a rope ran, that was fastened at the end of the chain at my wrist. The tormentors then, stretching these ropes by means of a roller, pressed and bruised my stomach in proportion as the ropes were drawn tighter.

Torture of a Free Mason

The torture of a free mason. Caption below illustration: "They next set my back against a thick board,…

(1808-1873) American statesman, jurist, and member of the Free-Soil party.

Salmon Portland Chase

(1808-1873) American statesman, jurist, and member of the Free-Soil party.

When binding books they are "sewed on a frame, each sheet being attached by a thread to cords across the back. The sewing, though sometimes done by a machine, is cheifly executed by girls."-Lupton

Book Binding

When binding books they are "sewed on a frame, each sheet being attached by a thread to cords across…

"When the soap is properly formed, the lye is carefully separated from it, and then it is removed in buckets to the 'frame room,' where it is poured into large frames which are like bins, their sides being bolted together." _Lupton

Manufacturing of Soap

"When the soap is properly formed, the lye is carefully separated from it, and then it is removed in…

"Prostyle, in architecture, applied to a portico in which the columns stand out quite free from the wall of the building to which it is attached; also applied to a temple or other structure having pillars in front only." -Marshall

Plan view of a Prostyle Temple

"Prostyle, in architecture, applied to a portico in which the columns stand out quite free from the…

A circular window, divided into compartments by mullions and tracery radiating from a centre, also called Catharine-wheel, and marigold-window.

Rose Brickwork Window

A circular window, divided into compartments by mullions and tracery radiating from a centre, also called…

Chief veins and arteries of the body. Labels: a, place of the heart; the veins are in the back. On the right side of the picture the veins just under the skin are shown on the other side the deep vessels near the bones. b, vessels to the lungs.

Veins and Arteries of the Body

Chief veins and arteries of the body. Labels: a, place of the heart; the veins are in the back. On the…

The skeleton of a haddock. In some species such as the haddock, there is a modified form of the coracoid bone, free at its lower extremities, which may, perhaps, subserve the purpose of the clavicle of the higher animals.

Skeleton of a Haddock

The skeleton of a haddock. In some species such as the haddock, there is a modified form of the coracoid…

The mucous membrane from the jejunum. Labels: 1, Villi (folds of lining mucous membrane) in miniature. 2, Tubular glands: their orifices. 3, Opening on the free surface of the mucous membrane. 4, Fibrous tissue.

Mucous Membrane from the Jejunum

The mucous membrane from the jejunum. Labels: 1, Villi (folds of lining mucous membrane) in miniature.…

Portion of the mucous membrane from the small intestine, magnified, showing the villi on its free surface, and between them the orifices of the tubular glands. Labels: 1, Portion of a clustered gland. 2, A solitary gland. 3, Fibrous tissue.

A Portion of the Mucous Membrane from the Small Intestine

Portion of the mucous membrane from the small intestine, magnified, showing the villi on its free surface,…

"The principal working parts of the apparatus are the sheet of boiler plate a (fig. 100), the cylinder c, the piston head p, the screw s, and conduit plate d...f, frame." -Walcott, 1901

Intrusion Machine

"The principal working parts of the apparatus are the sheet of boiler plate a (fig. 100), the cylinder…

The vertical section of the stratified epithelium of the cornea of a rabbit. Labels: a, Anterior epithelium showing the different shapes of the cells at various depths from the free surface; b, a portion of the substance of cornea.

Epithelium of the Rabbit's Cornea

The vertical section of the stratified epithelium of the cornea of a rabbit. Labels: a, Anterior epithelium…

When a 2 percent fresh solution of tannic acid is applied to frog's blood it causes the appearance of a sharply defined little knob, projecting from the free surface (Robert's macula): the coloring matter becomes at the same concentrated in the nucleus, which grows more distinct. A somewhat similar effect is produced on the human blood corpuscle.

Effect of Tannin on Red Blood Cells

When a 2 percent fresh solution of tannic acid is applied to frog's blood it causes the appearance of…

The stethometer consists of a frame formed of two parallel steel bars joined by a third at one end. At the free end of the bars is attached a leather strap, by means of which the apparatus may be suspended from the neck. Attached to the inner end of one bar is a tambour and ivory button, to the end of the other an ivory button. When in use, the apparatus is suspended with the transverse bar posteriorly, the button of the tambour is placed on the part of the chest the movement of which it is desire to record, and the other button is made to press upon the corresponding side of the chest, so that the chest is held between a pair of callipers.

Stethometer

The stethometer consists of a frame formed of two parallel steel bars joined by a third at one end.…

Section of a mucous gland from the tongue. Labels: A, opening of the duct on the free surface; C, basement membrane with nuclei; B, flattened epithelial cells lining duct. The duct divides into several branches, which are convoluted and end blindly, being lined throughout by columnar epithelium. D, lumen of one of the tubuli of the gland.

Mucous Gland from Tongue

Section of a mucous gland from the tongue. Labels: A, opening of the duct on the free surface; C, basement…

Section showing the pyloric glands. Labels: s, free surface; d, ducts of pyloric glands; n, neck of same; m, the gland alveoli; mm, muscularis mucosae.

Pyloric Gland

Section showing the pyloric glands. Labels: s, free surface; d, ducts of pyloric glands; n, neck of…

Types of microorganisms. Labels: a, micrococci arranged singly; in twos, diplococci- if all the micrococci at a were grouped together, they would be called staphylococci- and in fours, sarcinae; b, micrococci, in chains streptococci; c and d, bacilli of various kinds, one is represented with flagellum; e, various forms of spirilla; f, spores, either free or in bacilli.

Types of Microorganisms

Types of microorganisms. Labels: a, micrococci arranged singly; in twos, diplococci- if all the micrococci…

The hair is produced by a peculiar growth and modification of the epidermis. Externally it is covered by a layer of fine scales closely imbricated, or overlapping like the tiles of a house, but with the free edges turned upwards. It is called the cuticle of the hair. Shown in the magnified surface of a hair. The wave lines mark the upper or free edges of the cortical scales. B, separate scales.

Magnified Surface of a Hair

The hair is produced by a peculiar growth and modification of the epidermis. Externally it is covered…

Three laryngoscopic view of the superior aperture of the larynx and surrounding parts. Labels: A, the glottis during the emission of a high note in singing; B, in easy and quite inhalation of air; C, in the state of widest possible dilation, as in inhaling a very deep breath. The diagrams A', B', and C', show in horizontal sections of the glottis in position of the vocal ligaments and arytenoid cartilages in the three several states represented in the other figures. In all the figures, so far as marked, the letters indicate the parts as follows, viz. : l, the base of the tongue; e, the upper free part of the epiglottis; e', the tubercle or cushion of the epiglottis; p h, part of the anterior all of the pharynx behind the larynx; in the margin of the aryteno-epiglottisdean fold w, the swelling of the membrane caused by the cartilages of Wrisberg; s. that of the cartilages of Santorini: a, the tip or summit of the arytenoid cartilages; c v, the true vocal cords r lips of the rima glottidis; c v s, the superior or false vocal cords; between them the ventricle of the larynx; in C, tr, is placed on the anterior wall of the receding trachea, and b indicated the commencement of the two bronchi beyond the bifurcation which may be brought into view in this state of extreme dilation.

Movement of the Vocal Cords

Three laryngoscopic view of the superior aperture of the larynx and surrounding parts. Labels: A, the…

The five layers of the cortical gray matter of the cerebrum. 1, Superficial layer with abundance of neuroglia and few small multipolar ganglion cells. 2, A thin layer of a large number of closely packed small ganglion cells of pyramidal shape. 3, The most important layer, and the thickest of all: it contains many large pyramidal ganglion cells, each with a process running off from the apex vertically towards the free surface, and lateral processes at the base which are always branched. 4, Numerous ganglion cells come are large and others small, forming the granular formation of Meynert. 5, Spindle-shaped and branched ganglion cells of moderate size arranged chiefly parallel to the free surface.

Cortical Gray Matter of the Cerebrum

The five layers of the cortical gray matter of the cerebrum. 1, Superficial layer with abundance of…

The Frame of Medieval Arm-chair was made of iron with no drapery included.

Frame of Medieval Arm-Chair

The Frame of Medieval Arm-chair was made of iron with no drapery included.

The Renaissance bedstead was large in size, it was placed on a podium with a raised head-board. It had a canopy frame that was adorned with drapery and hangings.

Renaissance Bedstead

The Renaissance bedstead was large in size, it was placed on a podium with a raised head-board. It had…

The Renaissance bedstead was large in size, it was placed on a podium with a raised head-board. It had a canopy frame that was adorned with drapery and hangings.

Renaissance Bedstead

The Renaissance bedstead was large in size, it was placed on a podium with a raised head-board. It had…

The back of the Egyptian chair is treated as a frame.

Egyptian Chair

The back of the Egyptian chair is treated as a frame.

The modern decorative easel is a sloping frame with three or four legs. The front and rear are often connected by hinges to enable the angle of the slope to be altered. The front has a small board that can be adjusted to different heights by pins. Painters and sculptors used it, but it was often made as a decorative piece of furniture to hold pictures and portfolios.

Modern Decorative Easel

The modern decorative easel is a sloping frame with three or four legs. The front and rear are often…

The Gable-Opening of a Dormer-Window architectural frame was a 17th century French style frame.

Gable-Opening of a Dormer-Window

The Gable-Opening of a Dormer-Window architectural frame was a 17th century French style frame.

The German 17th century Architectural frame was an oblong shape that was surrounded by an ornate frame that is symmetrical on all sides., without regard to the top and bottom.

German 17th Century Architectural Frame

The German 17th century Architectural frame was an oblong shape that was surrounded by an ornate frame…

The German mirror frame was made in the 18th century. A mirror surrounded by scroll work.

German Mirror-Frame

The German mirror frame was made in the 18th century. A mirror surrounded by scroll work.

This modern frame is French.

Modern Architectural Frame

This modern frame is French.

This modern Tablet Architectural frame was in the style of the Italian Renaissance. It had the general shape of an erect triangle that has a cresting feature, free-ending upwards.

Tablet Frame

This modern Tablet Architectural frame was in the style of the Italian Renaissance. It had the general…

The Italian Renaissance Architectural frame was an oblong shape that was surrounded by an ornate frame that is symmetrical on all sides., without regard to the top and bottom.

Italian Renaissance Architectural Frame

The Italian Renaissance Architectural frame was an oblong shape that was surrounded by an ornate frame…

The German mirror frame was made in the 18th century. A mirror surrounded by scroll work.

German Mirror-Frame

The German mirror frame was made in the 18th century. A mirror surrounded by scroll work.

This pedestal architectural frame was from the Italian Renaissance.

Pedestal Frame

This pedestal architectural frame was from the Italian Renaissance.

The French Architectural frame constructed in 1529 was a lozenge panel (diamond shaped).

French Architectural Panel

The French Architectural frame constructed in 1529 was a lozenge panel (diamond shaped).

The door-panel architectural frame was a square that is surrounded by an ornament that is symmetrical on all sides without regard to the top and bottom.

Door-Panel Frame

The door-panel architectural frame was a square that is surrounded by an ornament that is symmetrical…

Renaissance frame.

Renaissance Architectural Frame

Renaissance frame.

The stove-tile architectural frame of the 17th century, was a square surrounded by an ornate frame that is symmetrical on all sides, without regard to the top and bottom.

Stove-Tile Frame

The stove-tile architectural frame of the 17th century, was a square surrounded by an ornate frame that…

This Italian Renaissance Architectural frame was used as the panel of stalls in San Giorgio Maggiore, a church in Venice, Italy. The frame has an oblong shape, surrounded by an ornate design which is symmetrical on all sides, without regard to top and bottom.

Italian Renaissance Architectural Frame

This Italian Renaissance Architectural frame was used as the panel of stalls in San Giorgio Maggiore,…

The German Renaissance Architectural frame had a small niche in the middle or curved out hole as a design.

German Renaissance Architectural Frame

The German Renaissance Architectural frame had a small niche in the middle or curved out hole as a design.

The Desk in San Giorgio Maggiore Architectural frame is an Italian Renaissance style. It was a oblong shape surrounded by an ornate frame that is symmetrical on all sides, without regard to the top and bottom.

Desk in San. Giorgio Maggiore Frame

The Desk in San Giorgio Maggiore Architectural frame is an Italian Renaissance style. It was a oblong…

The Coffer Architectural frame of the German Renaissance, was a round shape that is surrounded by an ornate frame that is symmetrical on all sides, without regard to the top and bottom.

Coffer Frame

The Coffer Architectural frame of the German Renaissance, was a round shape that is surrounded by an…

The Modern French Architectural Frame has an oblong shape in the middle that is surrounded by an ornate design which is symmetrical on all sides, without regard to top and bottom.

Modern French Architectural Frame

The Modern French Architectural Frame has an oblong shape in the middle that is surrounded by an ornate…

The pulpit Architectural frame was a German frame that was dated between 1595 to 1597. It had the general shape of an erect triangle that has a cresting feature, free-ending upwards.

Pulpit Frame

The pulpit Architectural frame was a German frame that was dated between 1595 to 1597. It had the general…

The Modern French Architectural Frame has an oblong shape in the middle that is surrounded by an ornate design which is symmetrical on all sides, without regard to top and bottom.

Modern French Architectural Frame

The Modern French Architectural Frame has an oblong shape in the middle that is surrounded by an ornate…

This modern frame was made in the style of the German Renaissance. It has an oblong shape in the center that is surrounded by an ornate design which is symmetrical on all sides, without regard to the bottom or top of the frame.

Modern Architectural Frame

This modern frame was made in the style of the German Renaissance. It has an oblong shape in the center…

Vertical section of dog's cerebellum. Labels: p m, pia mater; p, corpuscles of Purkinje, which are branched nerve cells lying in a single layer and sending single processed downwards and more numerous ones upwards, which branch continuously and extend through the deep "molecular layer" towards the free surface; g, dense layer of ganglionic corpuscles., closely resembling nuclear layers of retina; f, layer of nerve fibers, with a few scattered ganglionic corpuscles. This last layer (f) constitutes part of the white matter of the cerebellum, while the layer between it and the free surface are gray matter.

Cerebellum of Dog's Brain

Vertical section of dog's cerebellum. Labels: p m, pia mater; p, corpuscles of Purkinje, which are branched…

Vertical section of rabbit's cornea. Labels: anterior epithelium, showing the different shapes of the cells at various depths from the free surface; b, portion of the substance of cornea.

Magnified Rabbit's Cornea

Vertical section of rabbit's cornea. Labels: anterior epithelium, showing the different shapes of the…

Vertical section of rabbit's cornea, stained with gold chloride. Labels: e, Laminated anterior epithelium. Immediately beneath this is the anterior elastic lamina of Bowman. n, Nerves forming a delicate sub-epithelial plexus, and sending up fine twigs between the epithelial cells to end in a second plexus on the free surface; d, Descemet's membrane, consisting of a fine elastic layer, and a single layer of epithelial cells. the substance of the cornea, f, is seen to be fibrillated, and contains many layers of branched corpuscles, arranged parallel to the free surface, and here seen edgewise.

Section of Rabbit's Cornea

Vertical section of rabbit's cornea, stained with gold chloride. Labels: e, Laminated anterior epithelium.…

The posterior half of the retina of the left eye, viewed from before; s, the cut edge of the sclerotic coat; ch, the choroid; r, the retina; in the interior at the middle the macula lutea with the depression of the fovea centralis is represented by a slight oval shade; towards the left side the light spot indicates the colliculus or eminence at the entrance of the optic nerve, from the center of which the arteria centralis is seen spreading its branches into the retina, leaving the part occupied by the macula comparatively free.

Posterior Half of the Retina

The posterior half of the retina of the left eye, viewed from before; s, the cut edge of the sclerotic…

View of a section of the ovary of the cat. Labels: 1, outer covering and free border of the ovary; 1', attached border; 2, the ovarian stroma, presenting a fibrous and vascular structure; 3, granular substance lying external to the fibrous stroma; 4, blood-vessels; 5, ovigerms in their earliest stages occupying part of the granular layer near the surface; 6, ovigerms which have begun to enlarge and to pass more deeply into the ovary; 7, ovigerms round which the Graafian follicles and tunica granulosa are now formed and which have passed somewhat deeper into the ovary and are surrounded by the fibrous stroma; 8, more advanced Graafian follicle with the ovum imbedded in the layer of cells constituting the proligerous disc; 9, the most advanced follicle containing the ovum; 9', a follicle from which the ovum has accidentally escaped; IO, corpus luteum.

Ovary of the Cat

View of a section of the ovary of the cat. Labels: 1, outer covering and free border of the ovary; 1',…

"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 tenth page of Biblia Pauperum (Paupers' Bible), a picture Bible. At the top and bottom are portraits of prophets and in the middle are three bible stories. Left: Jacob and Esau, middle: the temptation of Christ by the Devil, right: the temptation of Adam and Eve.

Biblia Pauperum

The tenth page of Biblia Pauperum (Paupers' Bible), a picture Bible. At the top and bottom are portraits…

A picture of Jacob and Esau from the tenth page of the engraving, Biblia Pauperum (Paupers' Bible), a picture Bible.

Biblia Pauperum, Jacob and Esau

A picture of Jacob and Esau from the tenth page of the engraving, Biblia Pauperum (Paupers' Bible),…

"To set itself entirely free, the chrysalis alternately lengthens and shortens itself. The old skin gradually pushed upward, until it is considerably shortened."

Chrysalides of the Small Tortoise-shell Butterfly Freeing Themselves from the Caterpillar Skin

"To set itself entirely free, the chrysalis alternately lengthens and shortens itself. The old skin…

Free surface of the mucous membrane of the small intestine, showing villi, solitary glands, and opening of the intestinal glands.

Mucous Membrane of the Small Intestine

Free surface of the mucous membrane of the small intestine, showing villi, solitary glands, and opening…

This picture is of a young woman arranging flowers.

Flower Arranging

This picture is of a young woman arranging flowers.

The frame work of a Pennsylvanian barn.

The Pennsylvanian barn frame work

The frame work of a Pennsylvanian barn.