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"Monoclinic. Crystals are usually prismatic in habit and have as prominent forms, clinopinacoid, base, prism, with often smaller orthodomes." — Ford, 1912

Orthoclase

"Monoclinic. Crystals are usually prismatic in habit and have as prominent forms, clinopinacoid, base,…

"Monoclinic. Crystals are usually prismatic in habit and have as prominent forms, clinopinacoid, base, prism, with often smaller orthodomes." — Ford, 1912

Orthoclase

"Monoclinic. Crystals are usually prismatic in habit and have as prominent forms, clinopinacoid, base,…

"Monoclinic. Crystals are usually prismatic in habit and have as prominent forms, clinopinacoid, base, prism, with often smaller orthodomes." — Ford, 1912

Orthoclase

"Monoclinic. Crystals are usually prismatic in habit and have as prominent forms, clinopinacoid, base,…

"Triclinic. Crystals commonly tabular parallel to base." — Ford, 1912

Rhodonite

"Triclinic. Crystals commonly tabular parallel to base." — Ford, 1912

"Hexagonal. Strong prismatic habit. Frequently vertically striated and grooved. Forms usually present consist only of prism of first order and base." — Ford, 1912

Beryl

"Hexagonal. Strong prismatic habit. Frequently vertically striated and grooved. Forms usually present…

"Hexagonal. Strong prismatic habit. Frequently vertically striated and grooved. Forms usually present consist only of prism of first order and base. Small pyramid faces of both the first and second orders sometimes occur, but the pyramid faces are rarely prominent." — Ford, 1912

Beryl

"Hexagonal. Strong prismatic habit. Frequently vertically striated and grooved. Forms usually present…

"Tetragonal. Prismatic in habit. Often vertically striated. Common forms are prisms of first and second orders, pyramid of first order and base." — Ford, 1912

Vesuvianite

"Tetragonal. Prismatic in habit. Often vertically striated. Common forms are prisms of first and second…

"Tetragonal. Prismatic in habit. Often vertically striated. Common forms are prisms of first and second orders, pyramid of first order and base." — Ford, 1912

Vesuvianite

"Tetragonal. Prismatic in habit. Often vertically striated. Common forms are prisms of first and second…

"Orthohombic, hemimorphic. Crystals usually tabular parallel to the brachypinacoid. They show prism faces and are terminated above usually by a combination of macrodomes and brachydomes and base, and below by a pyramid." — Ford, 1912

Calamine

"Orthohombic, hemimorphic. Crystals usually tabular parallel to the brachypinacoid. They show prism…

"Hexagonal-rhombohedral; hemimorphic. Crystals usually prismatic, vertically striated. A triangular prism, with three faces, prominent, which with the tendency of the prism faces to be vertically striated and to round into each other gives the crystals usually a cross section like a spherical triangle. Crystals are commonly terminated by base and low positive and negative rhombohedrons; sometimes scalenohedrons are present. When the crystals are doubly terminated they usually show different forms at the opposite ends of the vertical axis." — Ford, 1912

Tourmaline

"Hexagonal-rhombohedral; hemimorphic. Crystals usually prismatic, vertically striated. A triangular…

"Orthohombic. Habit prismatic, showing usually a combination of prism with large angle, brachypinacoid, base and macrodome." — Ford, 1912

Staurolite

"Orthohombic. Habit prismatic, showing usually a combination of prism with large angle, brachypinacoid,…

"Orthohombic. Crystals usually tabular parallel to base; often diamond shaped because of the presence of a short prism. Both macro- and brachydomes usually present, either beveling the corners of the diamond-shaped crystals, or if the prism faces are wanting, beveling the edges of the tavles and forming rectangular prismatic-shaped crystals elongated parallel to either the brachy- or macro-axis." — Ford, 1912

Barite

"Orthohombic. Crystals usually tabular parallel to base; often diamond shaped because of the presence…

"Orthohombic. Crystals usually tabular parallel to base; often diamond shaped because of the presence of a short prism. Both macro- and brachydomes usually present, either beveling the corners of the diamond-shaped crystals, or if the prism faces are wanting, beveling the edges of the tavles and forming rectangular prismatic-shaped crystals elongated parallel to either the brachy- or macro-axis." — Ford, 1912

Barite

"Orthohombic. Crystals usually tabular parallel to base; often diamond shaped because of the presence…

"Orthorhombic. Crystals resemble closely those of barite. Commonly tabular parallel to the base or prismatic parallel to the brachy- or macro-axis with prominent development of the domes. Crystals which are elongated parallel to the brachy-axis are frequently terminated in front by four faces in nearly equal development, consisting of 2 prism faces and 2 of the macrodome." — Ford, 1912

Celestite

"Orthorhombic. Crystals resemble closely those of barite. Commonly tabular parallel to the base or prismatic…

"A four-sided figure, formed of 2 unequal isosceles triangles on different sides of a common base." — Williams, 1889

Deltoid

"A four-sided figure, formed of 2 unequal isosceles triangles on different sides of a common base."…

Picture of the skull, showing the hole which the backbone connects to the base of the skull.

Skull

Picture of the skull, showing the hole which the backbone connects to the base of the skull.

A pyramid is a solid whose base is a plan figure, and whose sides are triangles uniting at a common point, called the vertex. If a straight line be drawn on one of the sides of a pyramid from the vertex so as to be perpendicular to one edge of the base, this line is called the slant height.

Pyramid

A pyramid is a solid whose base is a plan figure, and whose sides are triangles uniting at a common…

A cone is a solid whose base is a circle, and whose convex surface tapers uniformly to a point called the vertex. If a straight line be drawn on the cone from the vertex to the edge of the base, this line is ccalled the slant height.

Cone

A cone is a solid whose base is a circle, and whose convex surface tapers uniformly to a point called…

If a pyramid be cut by a plan parallel to the base, so as to form two parts, the lower part is called the frustum of the pyramid.

Frustum

If a pyramid be cut by a plan parallel to the base, so as to form two parts, the lower part is called…

A roman moulding, called a <em>Torus.</em> It is composed of a semicircle and a fillet. The smicircle projects from the fillet an amount equal to its radius. The concave addition above the fillet and the projection below the half round shows a combination of mouldings used in the base of a <em>Doric Column</em>.

Torus

A roman moulding, called a Torus. It is composed of a semicircle and a fillet. The smicircle…

This shows the old fashioned rope stirrup rigging. The scaffold as a whole consists of a platform twenty inches wide and from ten to twenty feet long. (This platform is an especially strong ladder with planks secured to the rungs.) Cross bars, the timbers under the platform constitute the lower part of the stirrups. They have roller wheels in the ends which are in contact with the building. Then there are the rope stirrups which fasten the cross bars to the lower block as shown in the picture. The falls (pulley blocks and ropes) and the cornice hooks complete the scaffold.

Swing Stage Scaffold

This shows the old fashioned rope stirrup rigging. The scaffold as a whole consists of a platform twenty…

This is used on the upper end of two extension ladders in place of cornice hooks, where the building is not too high. The upper blocks are hooked on as shown in the picture and the stage platform swings between the ladders and the wall.

Swing Stage Ladder Bracket

This is used on the upper end of two extension ladders in place of cornice hooks, where the building…

"Ionic order. From the Temple of Athene (Minerva) at Priene." &mdash;D'Anvers, 1895

Ionic order

"Ionic order. From the Temple of Athene (Minerva) at Priene." —D'Anvers, 1895

"Corinthian Order. From the Monument of Lysicrates, at Athens." &mdash;D'Anvers, 1895

Corinthian order

"Corinthian Order. From the Monument of Lysicrates, at Athens." —D'Anvers, 1895

Section of the seed, showing the small embryo inclosed in the base of the endosperm.

Great Bulrush

Section of the seed, showing the small embryo inclosed in the base of the endosperm.

A species of crow. It differs from other birds of the crow family in having a naked spot at the base of the bill, and in feeding on grain and insects instead of carrion.

Rook

A species of crow. It differs from other birds of the crow family in having a naked spot at the base…

This illustration shows the formation of tubers: A, old potato or tuber with two shoots reaching up into the air and from the base of these shoots, rhizomes have been formed that are developing new tubers. B, mature tuber with spirally arranged buds, the so-called "eyes" of the potato.

Tubers

This illustration shows the formation of tubers: A, old potato or tuber with two shoots reaching up…

This illustration shows the germination of the gametospore: A, section of a mature archegonium with canal cells dissolved, thus forming a passageway to the large female gamete, g. B, sectional view of base of archegonium, showing the germinating gametospore in two-cell stage. The perianth, p, is seen growing up about the archegonium. C, later stage in growth of the gametospore. The lower cell shown in B is forming stalk cells, while the outer cell has produced densely granular cells that will later by further division form spore mother cells and elaters.

Gametospore

This illustration shows the germination of the gametospore: A, section of a mature archegonium with…

This illustration shows the structure of capsule of Funaria: 5, capsule with calyptra, 5A, removed. 6, section of nearly mature capsule-sp, spore-forming cells surrounded on outside by loosely arranged chlorophyll-bearing cells; o, operculum; r, annulus; p, peristome; a, apophysis. 8, magnified view of a portion of the capsule, showing the annulus, r, and the thick-walled cells of the peristome, p, which are attached at their base to the epidermis by a double row of cells; sp, spore-forming cells, the doted line should run to the four roundish cells at the left. 7, the cells shown in 8, p, have split apart, thus orming the inner and outer teeth-like segments of the peristome.

Funaria

This illustration shows the structure of capsule of Funaria: 5, capsule with calyptra, 5A, removed.…

This is an illustration of crystals from the base of an onion, one of them a hemitrope or double.

Onion Magnified

This is an illustration of crystals from the base of an onion, one of them a hemitrope or double.

This illustration shows the rhizoma of Diphylleia cymosa, showing six years of growth, and a bud for the seventh. a, the bud; b, base of the stalk of the current year; c, scar left by the dcay of the annual stalk of the year before; and beyong are the scars of previous years.

Diphylleia Cymosa

This illustration shows the rhizoma of Diphylleia cymosa, showing six years of growth, and a bud for…

This illustration shows a radical leaf of the White Lily, with its base thickened into a bulb-scale, cut across below to show its thickness.

White Lily

This illustration shows a radical leaf of the White Lily, with its base thickened into a bulb-scale,…

The genus Mammillaria is one of the largest in the cactus family Cactaceae. the distinctive feature of the genus is the specific development of an areole, that is split into two clearly separated parts, one occurring at the tubercules apex, the other at its base.

Mammillaria

The genus Mammillaria is one of the largest in the cactus family Cactaceae. the distinctive feature…

A sessile leaf having its base extending downward along the stem.

Decurrent Leaf

A sessile leaf having its base extending downward along the stem.

A man trying to touch the base before the baseman catches the pass.

Base

A man trying to touch the base before the baseman catches the pass.

A player attempting to slide in to base.

Sliding

A player attempting to slide in to base.

A large, triangular bone at the base of the vertebral column at the upper and back part of the pelvic cavity.

Sacrum

A large, triangular bone at the base of the vertebral column at the upper and back part of the pelvic…

Bones situated at the sides and base of the skull. Each consists of five parts: the squama, the petrous, mastoid, and tympanic parts, and the styloid process.

Temporal Bone

Bones situated at the sides and base of the skull. Each consists of five parts: the squama, the petrous,…

A bone situated at the base of the skull in front of the temporals and basilar part of the occipital.

Sphenoid Bone

A bone situated at the base of the skull in front of the temporals and basilar part of the occipital.

A bone situated at the base of the skull in front of the temporals and basilar part of the occipital.

Sphenoid Bone

A bone situated at the base of the skull in front of the temporals and basilar part of the occipital.

A bone situated at the base of the skull in front of the temporals and basilar part of the occipital.

Sphenoid Bone

A bone situated at the base of the skull in front of the temporals and basilar part of the occipital.

This illustration shows the base of the skull. The inner or cerebal surface.

Skull

This illustration shows the base of the skull. The inner or cerebal surface.

A portion of the ornament which runs along the base of the rows of figures on the monolithic doorway. Details that show Tiahuanacu existed.

Base

A portion of the ornament which runs along the base of the rows of figures on the monolithic doorway.…

"If a pyramid be cut by a plane, parallel to the base, so as to form two parts, the lower part is called the frustum of the pyramid." &mdash; Hallock, 1905

Pyramid

"If a pyramid be cut by a plane, parallel to the base, so as to form two parts, the lower part is called…

"If a cone be cut by a plane, parallel to the base, so as to form two parts, the lower part is called the frustum of the cone." &mdash; Hallock, 1905

Cone

"If a cone be cut by a plane, parallel to the base, so as to form two parts, the lower part is called…

"Right octahedron with rhombic base." &mdash; Hallock, 1905

Octahedron

"Right octahedron with rhombic base." — Hallock, 1905

"Right octahedron with rhombic base." &mdash; Hallock, 1905

Octahedron

"Right octahedron with rhombic base." — Hallock, 1905

"A genus of plants of the natural order Saxifrangeae. This order has a calyx, usually of five sepals more or less cohering at the base; a corolla usually of five sepals more or less cohering at the base; a corolla usually of five perigynous petals, alternate with the sepals, rarely wanting; perigynous stamens; a hypogynous or perigynous disc; an overy, usually of two carpels, cohering more or less by their face, but diverging at the apex." &mdash; Chambers, 1881

Saxifrage

"A genus of plants of the natural order Saxifrangeae. This order has a calyx, usually of five sepals…

The side view and base of the skull of an ape.

Ape Skull

The side view and base of the skull of an ape.

"The great pagoda at Tanjore is by far the grandest temple in India, resting on a base 83 feet suare, rises in fourteen stories to a height of nearly 200 feet." &mdash; Encyclopedia Britanica, 1893

Temple, Tanjore

"The great pagoda at Tanjore is by far the grandest temple in India, resting on a base 83 feet suare,…

A small ring necked plover of North America. It is of a pale gray color above and white below, with a narrow black frontlet and necklace, and the bill black, and orange at the base.

Piping Plover

A small ring necked plover of North America. It is of a pale gray color above and white below, with…

This fish is of a dark olive color heavily dotted with black, and has two dark bars at the base of the caudal fin.

Pirate Perch

This fish is of a dark olive color heavily dotted with black, and has two dark bars at the base of the…

A machine used for planing large blocks of wood.

Planing Machine

A machine used for planing large blocks of wood.

A system of pulleys used to lift an object.

Pulley System

A system of pulleys used to lift an object.

A system of pulleys used to lift an object.

Pulley System

A system of pulleys used to lift an object.

A system of pulleys used to lift an object.

Pulley System

A system of pulleys used to lift an object.

A system of pulleys used to lift an object.

Pulley System

A system of pulleys used to lift an object.

A system of pulleys used to lift an object.

Pulley System

A system of pulleys used to lift an object.

A system of pulleys used to lift an object.

Pulley System

A system of pulleys used to lift an object.

A system of pulleys used to lift an object.

Pulley System

A system of pulleys used to lift an object.