Illustration to show that if through any point in the bisector of an angle a line is drawn parallel to either of the sides of the angle, the triangle thus formed is isosceles.

Angle Bisector Drawn Parallel to A Side

Illustration to show that if through any point in the bisector of an angle a line is drawn parallel…

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 bottom; the part of a thing on which it stands or rests.

Base

The bottom; the part of a thing on which it stands or rests.

This Roman base is a design found in the Capitalone museum of Rome, Italy. It is a design of leaves encircling the bottom the shaft.

Roman Base

This Roman base is a design found in the Capitalone museum of Rome, Italy. It is a design of leaves…

This Roman base is found in the Temple of Concord in Rome, Italy. It is a natural method of decoration, where a row of artificial leaves encircle the shaft.

Roman Base

This Roman base is found in the Temple of Concord in Rome, Italy. It is a natural method of decoration,…

This Roman base is found in the Baptistery of Constantinople, Rome, Italy. It is a natural method of decoration, where a row of artificial leaves encircle the shaft.

Roman Base

This Roman base is found in the Baptistery of Constantinople, Rome, Italy. It is a natural method of…

"Base Ball is a field game played principally in the United States. It originated in the English school-boy game of "rounders;" but it has been so improved and so generally played as to merit its name of "the National game of America." The plaing of baseball has become largely a business or a "profession," and skilled players receive large salaries. As an amateur game, however, it is also most popular."—(Charles Leonard-Stuart, 1911)

Baseball Diamond

"Base Ball is a field game played principally in the United States. It originated in the English school-boy…

"Arteries and their Branches at the Base of the Brain." — Blaisedell, 1904

Blood vessels of the brain

"Arteries and their Branches at the Base of the Brain." — Blaisedell, 1904

"Crankcase showing bearings. The heart of the automobile is the engine. It is built around the crankcase, which is its foundation or base." -Bodmer, 1917

Building an Automobile, Step 01: Crankcase

"Crankcase showing bearings. The heart of the automobile is the engine. It is built around the crankcase,…

The Antique candelabrum base is made out of bronze. It is divided into three legs that are stretched out with lion's claws as feet.

Antique Candelabrum Base

The Antique candelabrum base is made out of bronze. It is divided into three legs that are stretched…

The Antique candelabrum base is made out of bronze. It is a design that is divided into three legs that are stretched out with lion's claws as feet.

Antique Candelabrum Base

The Antique candelabrum base is made out of bronze. It is a design that is divided into three legs that…

The Antique candelabrum base is made out of bronze. It is a design that is divided into three legs that are stretched out with lion's claws as feet.

Antique Candelabrum Base

The Antique candelabrum base is made out of bronze. It is a design that is divided into three legs that…

The Antique candelabrum base is made out of bronze. It is a design that is divided into three legs that are stretched out with lion's claws as feet.

Antique Candelabrum Base

The Antique candelabrum base is made out of bronze. It is a design that is divided into three legs that…

This leg of candelabrum base is an antique design that is found in Paestum, Italy. In this design the claw rests on a disc.

Leg of Candelabrum Base

This leg of candelabrum base is an antique design that is found in Paestum, Italy. In this design the…

This leg of candelabrum base is an antique design of an animal's foot.

Leg of Candelabrum Base

This leg of candelabrum base is an antique design of an animal's foot.

The Renaissance Candelabrum base is a design that comes from a collection of drawings found in the Uffizi Gallery in Florence, Italy.

Renaissance Candelabrum Base

The Renaissance Candelabrum base is a design that comes from a collection of drawings found in the Uffizi…

The Roman candelabrum base is encircled with leaves and lion's claws as feet.

Roman Candelabrum Base

The Roman candelabrum base is encircled with leaves and lion's claws as feet.

This chandelier is made out of brass. It has an elongated design with chains holding a plate at the base, with a light in the center of the plate.

Chandeliers

This chandelier is made out of brass. It has an elongated design with chains holding a plate at the…

Composite order

Composite Order

Composite order

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

Cone

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

Illustration of a cone with a polygon inscribed used to show that the volume of a circular cone is equal to one third the product of its base by its altitude.

Volume of Cone

Illustration of a cone with a polygon inscribed used to show that the volume of a circular cone is equal…

Corinthian order

Corinthian Order

Corinthian order

Or, a cross, gules. THE CROSS ... as its name imports, was the distinguishing badge of the Crusaders, in its simplest form. It was merely two pieces of list or riband of the same length, crossing each other at right angles. The colour of the riband or list denoted the nation to which the Crusader belonged. The cross is an honourable ordinary, occupying one fifth of the shield when not charged, but if charged, one third. -Hall, 1862

Couple-Close

Or, a cross, gules. THE CROSS ... as its name imports, was the distinguishing badge of the Crusaders,…

Doric order

Doric Order

Doric order

"A quadrant, or one fourth of a circle. The oblique lines indicate various angles with the base. The heavy line indicates the inclination of the earth's axis as compared with the plane of its orbit, which is represented by the base." -Wiswell, 1913

Inclination of Earth's Axis

"A quadrant, or one fourth of a circle. The oblique lines indicate various angles with the base. The…

A freestanding structure designed to hold an artist's canvas or panel during painting. Also may be decorative for display.

Art Easel

A freestanding structure designed to hold an artist's canvas or panel during painting. Also may be decorative…

"The electrical machine most usually employed consists of a large circular plate of glass, mounted upon a metallic axis, and supported upon pillars fixed to a secure base, so that the plate can, by means of a handle, w, be turned with ease. Upon the supports of the glass, and fixed so as to press easily but uniformly on the plate, are four rubbers, marked r r r r in the figure; and flaps of silk, s s, oiled on one side, are attached to these, and secured to fixed supports by several silk cords. When the machine is put in motion, these flaps of silk are drawn tightly against the glass, and thus the friction is increased, and electricity excited. The points p p collect the electricity from the glass, and convey it to the conductor, c, which is supported by the glass rod g." —Wells, 1857

Electrical Machine

"The electrical machine most usually employed consists of a large circular plate of glass, mounted upon…

"A form of an electrical machine. S being the glass cylinder turning on an axis, Y the conductor, F the rubber, A A supports." —Wells, 1857

Electrical Machine

"A form of an electrical machine. S being the glass cylinder turning on an axis, Y the conductor, F…

A diagram showing the titles for different types of architecture.

Elements of an Architectural Order

A diagram showing the titles for different types of architecture.

A flashcard featuring an illustration of a Pyramid with a Hexagonal Base

Flashcard of a Pyramid with a Hexagonal Base

A flashcard featuring an illustration of a Pyramid with a Hexagonal Base

A flashcard featuring an illustration of a Pyramid with a Pentagonal Base

Flashcard of a Pyramid with a Pentagonal Base

A flashcard featuring an illustration of a Pyramid with a Pentagonal Base

A flashcard featuring an illustration of a Pyramid with a Rectangular Base

Flashcard of a Pyramid with a Rectangular Base

A flashcard featuring an illustration of a Pyramid with a Rectangular Base

A flashcard featuring an illustration of a Pyramid with a Square Base

Flashcard of a Pyramid with a Square Base

A flashcard featuring an illustration of a Pyramid with a Square Base

A flashcard featuring an illustration of a Pyramid with a Triangular Base

Flashcard of a Pyramid with a Triangular Base

A flashcard featuring an illustration of a Pyramid with a Triangular Base

"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." —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…

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

This miniature frame is made out of gold and oxidized silver. It is decorated with a grouping of flowers at the very top, and a female figure on each side. At the base is an infant figure on each side with a ribbon that connects them in the center.

Miniature Frame

This miniature frame is made out of gold and oxidized silver. It is decorated with a grouping of flowers…

"Argent, a fusil, purpure. The fusil is narrower than the lozenge, the angles at the chief and base being more acute, and the others more obtuse." -Hall, 1862

Fusil Ordinary

"Argent, a fusil, purpure. The fusil is narrower than the lozenge, the angles at the chief and base…

General Gate's headquarters at Saratoga.

Gate's Headquarters

General Gate's headquarters at Saratoga.

Ionic order

Ionic Order

Ionic order

This lectern (reading desk) is made out of bronze in an antique style. It has a design of an eagle with its wings open resting on the desk in the center, on each side is a candlestick. The base of the lectern is supported by seated dogs.

Lectern

This lectern (reading desk) is made out of bronze in an antique style. It has a design of an eagle with…

Labeled shapes showing various measures of form.

Measures of Form

Labeled shapes showing various measures of form.

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

Insulated Motor

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

"Argent, three mullets gules, accompanied with seven cross crosslets fitchy sable—three in chief, one in fess, two in flanks, one in base. FLANK. That part of an escutcheon between the chief and the base." -Hall, 1862

Mullets and Cross Crosslets

"Argent, three mullets gules, accompanied with seven cross crosslets fitchy sable—three in chief,…

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

Octahedron

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

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

Octahedron

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

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

Corinthian order

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

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

Ionic order

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

Illustration of parallelogram AEFC drawn two different ways with base b and altitude/height a used to prove the area is aXb.

Area of a Parallelogram

Illustration of parallelogram AEFC drawn two different ways with base b and altitude/height a used to…

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.

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.

Diagram used to prove the theorem: "The volume of a any parallelopiped is equal to the product of its base and its altitude."

Volume of Parallelopiped

Diagram used to prove the theorem: "The volume of a any parallelopiped is equal to the product of its…

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…

This piano is made to serve as a table when closed. It is designed with two figures of reptiles at the base.

Piano

This piano is made to serve as a table when closed. It is designed with two figures of reptiles at the…

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.

Diagram used to prove the theorem: "The volume of a prismatoid is equal to the product of one-sixth the altitude into the sum of the two bases and four times the mid-section."

Volume of Prismatoid

Diagram used to prove the theorem: "The volume of a prismatoid is equal to the product of one-sixth…

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

Pryamid

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

Illustration of pentagonal pyramid used to show that the volume is equal to one third of the product of its base by its altitude.

Pentagonal Pyramid For Volume

Illustration of pentagonal pyramid used to show that the volume is equal to one third of the product…