 ### Armilla

"Armillary Sphere, an instrument used in astronomy. In its simplest form, consisting of a ring fixed… ### Egyptian Ball

"Some of the Egyptian female sports were rather of a hoydenish character, as the game of ball, in one… ### Bell in globe

A small bell inside of a glass sphere. ### Vertical Cross Section of Spherical Zones of a Casting

An illustration of a vertical cross section of the spherical zones of a casting with a diameter of 16… ### Invariable Cone

Possible forms of the invariable cone by means of the intersections with a concentric spherical surface. ### Comparative Volumes Of A Cone, Sphere, And Cylinder

Illustration used to compare the volumes of a cone, a sphere, and a cylinder. ### Comparative Surfaces Of A Cylinder And Sphere

Illustration used to compare the surfaces of a cylinder and a sphere. ### Distribution of Charge

"Distrbution of electrification on a charged hollow sphere. If an insulated conductor d be inserted… ### Earth Divisions

"The Earth, whose diameter is 7,912 miles, is represented by the globe, or sphere. The straight line… ### 2 Ellipses Inscribed In A Circle

Illustration of 2 concentric ellipses, whose major axes are vertical, inscribed in a circle whose diameter… ### Ellipses Inscribed In A Circle

Illustration of concentric ellipses, whose major axes are vertical, inscribed in a circle whose diameter… ### Ellipses Inscribed In A Circle

Illustration of concentric ellipses, whose major axes are vertical, inscribed in a circle whose diameter… ### Flashcard of a Sphere

A flashcard featuring an illustration of a Sphere ### Terrestrial Globe

"An artificial sphere on whose surface is drawn a map or representation of the earth." -Whitney, 1911 ### Gyroscope

Three suspended concentric circles free to move independently of each other at right angles. ### Contours of a half sphere

"The contours of a half sphere are a series of circles, far apart near the center (top) and near together… ### Helios

"Helios the Sun-God." —Bulfinch, 1897 ### Electrostatic Induction

"Bring a metallic sphere postively charged near an insulated cylindrical conductor with hemispherical… ### Micrometer

"a is the sphere, placed in half-holes on the axis bb, so that when its principal axis is parallel to… ### Micrometer

"a is the sphere, placed in half-holes on the axis bb, so that when its principal axis is parallel to… ### Convex Mirror

"A convex mirror is a part of a sphere, or globe, reflecting from the outside." -Comstock 1850 ### Sphere Cut By Plane

Diagram used to prove the theorem: "Every section of a sphere by a lane is a circle." ### Sphere Tangent to Plane

Diagram used to prove the theorem: "A plane perpendicular to a radius at its extremity is tangent to… ### Spherical Polygon

Illustration of a spherical polygon. ### Spherical Polygon

Illustration of a spherical polygon. ### Spherical Pyramid

Illustration of a spherical pyramid. ### Spherical Sector

Illustration of a spherical sector. ### Sphere With Sectors and Arcs

Diagram of a sphere with sectors and arcs drawn. ### Spherical Segments

Illustration of a spherical segments. ### Sphere

A sphere is a solid bounded by a uniformly curved surface, every point of which is equally distant from… ### Sphere

"A sphere is a solid bounded by a uniformly curved surface, every point of which is equally distant… ### Development of Sphere Gore Method

An illustration in flattening the sphere using Gore method by creating cylinder sections with equal… ### Development of Sphere Zone Method

An illustration of a development of sphere using Zone method by creating sections of rolled out cones. ### Sphere With 8-inch Diameter Cut by Planes

An 8-inch sphere cut by parallel planes, one 2 inches from center and the other 6 inches from center.… ### Sphere With Arcs and Poles

A sphere with arcs and poles. "The distance of all points in the circumference of a circle of a sphere… ### Arcs Drawn on Sphere

Illustration of a sphere with arcs drawn. ### Armillary sphere

"A number of rings arranged round a centre, so as to represent a sphere; used to illustrate the relative… ### Circle Made by Plane Passing Through a Sphere

"Every section of a sphere made by a plane is a circle." ### Circumference of a Circle of a Sphere

Diagram used to prove the theorem: "All points in the circumference of a circle of a sphere are equally… ### Sphere Cut Into Pyramids.

An illustration of a sphere cut into polygons as bases with their vertices at the center of sphere. ### Sphere Inside of Cylinder.

An illustration of a sphere inside of a cylinder with radius/diameter labeled. Illustration for showing… ### Sphere Inscribed in Tetrahedron

Illustration of a sphere inscribed in a tetrahedron. ### Sphere Inscribed in Tetrahedron

Illustration of a sphere inscribed in a tetrahedron. ### Sphere with arcs and circles labeled.

An illustration of a sphere showing diameter, arcs, and circles. A sphere is a solid bounded by a curved… ### Sphere With Arcs, Circles, and Zones Labeled.

An illustration of a sphere showing diameter, arcs, and circles. A sphere is a solid bounded by a curved… ### Plane Passing Through a Sphere

Illustration of a plane passing through a sphere. ### Sphere With Tangent Plane

Illustration of a sphere with a tangent plane. "A plane perpendicular to a radius at its extremity is… ### Sphere With Tangent Plane

Illustration of a sphere with a tangent plane. "A plane perpendicular to a radius at its extremity is… ### Polyhedral Angle in a Sphere

Illustration of a sphere with a polyhedral angle whose vertex is at the center of the sphere and whose… ### Polyhedral Angle in a Sphere

Illustration of a sphere with a polyhedral angle. ### Sphere Formed By Pyramids

Illustration showing that "the solids formed by the dissected part of the sphere are pyramids." ### Sphere With Quadrants and Poles

A sphere with quadrants and poles. "A point on the surface of a sphere, which is at the distance of… A sphere with quadrants drawn on it. ### Sphere With a Radius of 1 foot

An illustration of a sphere showing a radius of 1 foot. Illustration could be used for calculating volume. ### Wooden Sphere

A wooden hollow sphere created by using a lathe and wooden templet at a desired diameter. ### Zones or Segments of Spheres

An illustration of a zone of a sphere. A zone occurs when a sphere is cut by parallel planes that are… ### Zones or Segments of Spheres

An illustration of a zone of a sphere. A zone occurs when a sphere is cut by parallel planes that are… ### Equal Spheres With Triangles

Illustration of equal spheres with equal triangles. ### Equal Spheres With Triangles

Illustration of equal spheres with equilateral and equiangular triangles.