ClipArt ETC
A ground leaf of White Lily, its base (cut across) thickened into a bulb-scale. This plainly shows that bulb-scales are leaves.

White Lily

A ground leaf of White Lily, its base (cut across) thickened into a bulb-scale. This plainly shows that…

Piece of a branch of Pitch Pine, with three leaves in a fascicle or bundle, in the axial of a thin scale, which answers to a primary leaf. The bundle is surrounded at the base by a short sheath, formed of the delicate scales of the auxiliary bud.

Pitch Pine

Piece of a branch of Pitch Pine, with three leaves in a fascicle or bundle, in the axial of a thin scale,…

Flower of Standing Cypress (Gilia coronopifolia); gamopetalous: the tube answering to the long claws of the Soapwort, except that they are coalescent: the limb or border (the spreading part above) is <em>five-parted</em>, that is, the petals not there united except at very base.

Standing Cypress

Flower of Standing Cypress (Gilia coronopifolia); gamopetalous: the tube answering to the long claws…

Corolla of Toad-Flax, with similar corolla spurred at the base.

Toad-Flax

Corolla of Toad-Flax, with similar corolla spurred at the base.

Corolla of Morning Glory laid open, to show the five stamens inserted on it, near the base.

Morning Glory

Corolla of Morning Glory laid open, to show the five stamens inserted on it, near the base.

Two simple carpals or pistil-leaves, united at the base only, cut across both above and below.

Pistil of Saxifrage

Two simple carpals or pistil-leaves, united at the base only, cut across both above and below.

Forming fruit (capsule) of Gaultheria, with calyx thickening around its base.

Gaultheria

Forming fruit (capsule) of Gaultheria, with calyx thickening around its base.

A Tree-Fern, Dicksonia arborescens, with a young one near its base. In front a common herbaceous Fern (Polypodium vulgare) with its creeping stem or rootstock.

Tree-Fern

A Tree-Fern, Dicksonia arborescens, with a young one near its base. In front a common herbaceous Fern…

Fructification of a Jungermannia, its cellular spore-stalk, surrounded at base by some of the leaves, at summit the 4-valved spore-case opening, discharging spores and elaters.

Jungermannia

Fructification of a Jungermannia, its cellular spore-stalk, surrounded at base by some of the leaves,…

Lake George, also known as <em>Queen of American Lakes</em>, is a long narrow lake at the southeast base of the Adirondack Mountains, northern New York. The lake extends about 32.2 miles on a north-south axis and varies from 1 to 3 miles in width.

View of Lake George, N.Y.

Lake George, also known as Queen of American Lakes, is a long narrow lake at the southeast…

A single celled organism that is one of the building blocks of life.

Amoeba

A single celled organism that is one of the building blocks of life.

A standard mercury barometer has a glass column of about 30 inches in height, closed at one end, with an open mercury-filled reservoir at the base. Mercury in the tube adjusts until the weight of the mercury column balances the atmospheric force exerted on the reservoir.

Barometer

A standard mercury barometer has a glass column of about 30 inches in height, closed at one end, with…

When the glacier extends into the sea, the base is undermined by the warmer waters of the ocean, and great fragments are broken off by the waves, forming floating mountains of ice, called <em>icebergs</em>. Icebergs are particularly numerous in the North Atlantic, into which they descend from the extensive Arctic glacial region already described.

Icebergs

When the glacier extends into the sea, the base is undermined by the warmer waters of the ocean, and…

A tornado is a rotating column of air which is in contact with a cloud base and the surface of the earth.

Tornado

A tornado is a rotating column of air which is in contact with a cloud base and the surface of the earth.

Germinating onion, morre advanced; the chink at base of cotyledon opening for the protrusion of the plumule, consisting of a thread-shaped leaf.

Onion

Germinating onion, morre advanced; the chink at base of cotyledon opening for the protrusion of the…

Section of the base of germinating onion, showing plumule enclosed.

Onion

Section of the base of germinating onion, showing plumule enclosed.

Section of the base of germinating onion, showing plumule emerging.

Onion

Section of the base of germinating onion, showing plumule emerging.

The embryo, taken out whole: the thick mass is the cotyledon; the narrow body partly enclosed by it is the plumule; the little projection at its base is the very short radicle enclosed in the sheathing base of the first leaf of the plumule.

Indian Corn Embryo

The embryo, taken out whole: the thick mass is the cotyledon; the narrow body partly enclosed by it…

Grain of Indian Corn in germination; the ascending sprout is the first leaf of the plumule, enclosing the younger leaves within; at its base the primary root has broken through.

Indian Corn Grain

Grain of Indian Corn in germination; the ascending sprout is the first leaf of the plumule, enclosing…

Leaf of Red Clover: <em>at</em>, stipules, adhering to the base of <em>p</em>, the petiole; <em>b</em>, blade of three leaflets.

Red Clover

Leaf of Red Clover: at, stipules, adhering to the base of p, the petiole; b,…

One of the scales or carpels of the American Arbor-Vitae, the inside exposed to view, showing a pair of ovules on its base.

Arbor-Vitae

One of the scales or carpels of the American Arbor-Vitae, the inside exposed to view, showing a pair…

Base of a leaf and contained sporocarp filled with microspores cut across.

Isoetes

Base of a leaf and contained sporocarp filled with microspores cut across.

Base of a leaf and contained sporocarp filled with microspores cut lengthwise.

Isoetes

Base of a leaf and contained sporocarp filled with microspores cut lengthwise.

Overlapping portion of the base of the wing in Conocephalus, showing the ridged veins and sound-producing organ.

Wing

Overlapping portion of the base of the wing in Conocephalus, showing the ridged veins and sound-producing…

Rudiment of secondaries hooked to base of primaries of the Icerya Purchasi.

Cottony Cushion Scale

Rudiment of secondaries hooked to base of primaries of the Icerya Purchasi.

Antenna in flies; arista plumose at base.

Antenna

Antenna in flies; arista plumose at base.

Under surface, or base of brain.

Base of Brain

Under surface, or base of brain.

Orthogonal projection of a closed plane-faced polyhedron.

Polyhedron

Orthogonal projection of a closed plane-faced polyhedron.

Orthogonal projection of a closed plane-faced polyhedron.

Polyhedron

Orthogonal projection of a closed plane-faced polyhedron.

Uniting the theories of partial polygons of resistance and centres and lines of resistance, this buttress of blocks illustrates the tangential curve that is the line of pressures.

Buttress of Blocks

Uniting the theories of partial polygons of resistance and centres and lines of resistance, this buttress…

Method to construct an isosceles triangle

Construct Isosceles Triangle

Method to construct an isosceles triangle

Occipital bone of the human skull, inner surface. It is situated at the back and base of the skull. Labels: 9,9, and 10,10, depression for reception of lobes of brain; 11, foramen magnum.

Occipital Bone of the Human Skull

Occipital bone of the human skull, inner surface. It is situated at the back and base of the skull.…

Temporal bone of the human skull. The temporal bones are situated at the sides and base of the skull. Labels: 1, squamous portion; 2, placed below external opening of auditory canal in petrous portion; 3, placed below mastoid portion; 4, placed below glenoid cavity for reception of condyle of lower jaw.

Temporal Bone of the Human Skull

Temporal bone of the human skull. The temporal bones are situated at the sides and base of the skull.…

Sphenoid bone, situated the anterior part of the base of the skull, articulating with all the other cranial bones, which it binds firmly and solidly together. Labels: a, greater wing; b, lesser wing.

Sphenoid Bone of the Human Skull

Sphenoid bone, situated the anterior part of the base of the skull, articulating with all the other…

Base of brain, spinal cord, and spinal nerves. Labels: V, 5th nerve; VI, 6th nerve; VII, a, facial nerve, b, auditory nerve; VIII, pneumo-gastric nerve; VIII, a, glosso-pharyngeal, b, spinal accessory; IX, hypoglossal; c1-c7, cervical nerve root; d1-d12, dorsal nerve roots; L1-L5, lumbar nerve roots; S4-S5, 4th and 5th sacral nerves; Cocc, coccygeal nerves; B.P., brachial plexus; L.P., lumbar plexus; S.P. sacral plexus; S a, b, c, cervical sympathetic ganglia.

Spinal Cord, Spinal Nerves, and Base of Brain

Base of brain, spinal cord, and spinal nerves. Labels: V, 5th nerve; VI, 6th nerve; VII, a, facial nerve,…

The base of the brain. Labels: 1, longitudinal fissure; 2, 2, anterior lobes of cerebrum; 3, olfactory bulb; 7, optic commissure; 9, 3rd nerve, ; 11, 4th nerve; 13, 5th nerve; 14, crura cerebri, 15, 6th nerve; 16, pons Varolii; 17, 7th nerve; 19, 8th nerve; 20, medulla oblongata; 21, 9th nerve, 23, 10th nerve; 25, 11th nerve; 27, 12th nerve; 28, 29, 30, 31, 32, cerebellum.

Base of Brain

The base of the brain. Labels: 1, longitudinal fissure; 2, 2, anterior lobes of cerebrum; 3, olfactory…

The larynx as seen by means of the laryngoscope in different conditions of the glottis. Labels: A, while singing a high note; b, in quiet breathing; C, during a deep inspiration; l, base of tongue; e, upper free edge of epiglottis; e', cushion of the epiglottis; ph, part of anterior wall of pharynx; cv, the true vocal cords; cvs, the false vocal cords; tr, the trachea with its rings; b, the two bronchi at their commencement.

The Larynx in Different Conditions of the Glottis

The larynx as seen by means of the laryngoscope in different conditions of the glottis. Labels: A, while…

The mouth, nose, and pharynx, with the larynx and commencement of gullet (esophagus), seen in section. Labels: a, vertebral column; b, gullet (esophagus); c, trachea; d, larynx; e, epiglottis; f, soft palate, between f and e is the opening at back of cavity or faces; g, opening of Eustachian tube; h, nasal cavity; k, tongue; l, hard palate; m, sphenoid bone at base of skull; n, roof of nasal cavity; o, p, q, placed in nasal cavity.

The Mouth, Nose, and Pharynx

The mouth, nose, and pharynx, with the larynx and commencement of gullet (esophagus), seen in section.…

"Where five blocks are placed in this position, the point of gravity is near the centre of the thrd block, and is within the base as shown by the plumb line. But on adding another block, the gravitation point falls beyond the base, and the whole will now fall by its own weight." -Comstock 1850

Center of Gravity of Standing Blocks

"Where five blocks are placed in this position, the point of gravity is near the centre of the thrd…

"The power required to force a given weight up an inclined plane, is in proportion to its height, and the length of its base, or in other words, the force must be in proportion to the rapidity of its inclination." -Comstock 1850'

Inlined Plane with Weight

"The power required to force a given weight up an inclined plane, is in proportion to its height, and…

"The next simple mechanical power is the wedge. This instrument may be considered as two inclined planes, placed base to base." -Comstock 1850

Wedge

"The next simple mechanical power is the wedge. This instrument may be considered as two inclined planes,…

The base of the skull. "The lower jaw has been removed. At the lower part of the figure is the hard palate forming the roof of the mouth and surrounded by the upper set of teeth. Above this are the paired opening of the posterior nares, and a short way above the middle of the figure is the large median foramen magnum, with the bony convexities (or occipital condyles) which articular with the atlas, on its sides. It will be seen that the part of the skull behind the occipital condyles is about equal in size to that in front of them; in an ape the portion in front of the occipital condyles would be much larger than that behind them." &mdash;Newell, 1900

Base of the Skull

The base of the skull. "The lower jaw has been removed. At the lower part of the figure is the hard…

"A transmitter or key is a current interrupter manipulated by the operator. It consists essentially of a metal layer, L, pivoted at aa, and conneted to the line by the screw at m which is insultated from the base, and the screw at n which is connected to the base and lever." -Avery 1895

Telegraph Transmitter

"A transmitter or key is a current interrupter manipulated by the operator. It consists essentially…

The mouth, nose, and pharynx, with the commencement of the gullet (esophagus) and larynx, as exposed by a section, a little to the left of the median plane of the head. Labels: a, vertebral column; b, gullet; c, windpipe; d, larynx; e, epiglottis; f, soft palate; g, opening of Esutachian tube; k, tongue; l, hard palate; m; the sphenoid bone on the base of the skull; n, the fore part of the cranial cavity; o,p,q, the turbinate bones of the outer side of the left nostril chamber.

The Mouth, Nose, and Pharynx

The mouth, nose, and pharynx, with the commencement of the gullet (esophagus) and larynx, as exposed…

"A pyramid is a solid whose base is a polygon, and whose sides are triangles uniting at a common point, called the vertex." &mdash;Hallock 1905

Pryamid

"A pyramid is a solid whose base is a polygon, and whose sides are triangles uniting at a common point,…

"A cone is a solid whose base is a circle and whose convex surface tapers uniformly to a point." &mdash;Hallock 1905

Cone

"A cone is a solid whose base is a circle and whose convex surface tapers uniformly to a point." —Hallock…

"An inclined plane is a slope, or flat surface, making an angle with a horizontal line...the force acts parallel to the base." &mdash;Hallock 1905

Inclined Plane with the Force Acting Parallel to the Base

"An inclined plane is a slope, or flat surface, making an angle with a horizontal line...the force acts…

"An inclined plane is a slope, or a flat surface, making an angle with a horizontal line...the force acts at an angle to the plane or to the base." &mdash;Hallock 1905

Inclined Plane with Force at an Angle to Plane and Base

"An inclined plane is a slope, or a flat surface, making an angle with a horizontal line...the force…

"Motor insulated on a parallel timber base." &mdash;Croft 1920

Insulated Motor

"Motor insulated on a parallel timber base." —Croft 1920

"When a line of direction falls within the base, a body stands when not, it falls... On the same principle, a load of stone may pass safely over a hillside, on which a load of hay would be overturned [as shown by the line of direction in this illustration]." &mdash;Quackenbos 1859

Line of Direction from the Center of Gravity of an Object

"When a line of direction falls within the base, a body stands when not, it falls... On the same principle,…

"A bulb of liquid is placed in the base of the glass graduated tube. As temperature increases, the volume of the liquid increases and it expands up the tube where its level is read on the graduated scale." &mdash;Quackenbos 1859

Thermometer

"A bulb of liquid is placed in the base of the glass graduated tube. As temperature increases, the volume…

Parallelogram with dimensions drawn to show relationship to the area of a rectangle.

Parallelogram and Rectangle Relationship

Parallelogram with dimensions drawn to show relationship to the area of a rectangle.

Parallelogram illustration to show where the area of a triangle formula comes from.

Area of Triangle

Parallelogram illustration to show where the area of a triangle formula comes from.

Rectangle with dimensions labeled. Rectangle can be used to calculate area.

Rectangle With Dimensions

Rectangle with dimensions labeled. Rectangle can be used to calculate area.

Parallelogram with dimensions labeled. Parallelogram can be used to calculate area.

Parallelogram With Dimensions

Parallelogram with dimensions labeled. Parallelogram can be used to calculate area.

Parallelogram with dimensions labeled. Parallelogram can be used to calculate area.

Parallelogram With Dimensions

Parallelogram with dimensions labeled. Parallelogram can be used to calculate area.

Triangle with dimensions labeled. Triangle can be used to calculate area.

Triangle With Dimensions

Triangle with dimensions labeled. Triangle can be used to calculate area.

Triangle with dimensions labeled. Triangle can be used to calculate area.

Triangle With Dimensions

Triangle with dimensions labeled. Triangle can be used to calculate area.

Trapezoid with dimensions labeled. Trapezoid can be used to calculate area.

Trapezoid With Dimensions

Trapezoid with dimensions labeled. Trapezoid can be used to calculate area.

Pentagon with dimensions labeled. Pentagon can be used to calculate area by calculating individual triangles and finding the sum of the areas.

Pentagon With Triangular Sections For Area

Pentagon with dimensions labeled. Pentagon can be used to calculate area by calculating individual triangles…