 ### 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. ### Cone depicting Conic Sections

Diagram of a cone with spheres and cut by a plane to depict the conic sections. ### Cone depicting Conic Sections

Diagram of a cone with inscribed spheres and cut by various planes to depict the conic sections: circle,… ### Comparative Surfaces Of A Cylinder And Sphere

Illustration used to compare the surfaces of a cylinder and a sphere. ### Intersecting Cylinder and Sphere

Illustration of the intersection of a cylinder and a sphere. ### Intersecting Cylinder and Sphere

Illustration of the intersection of a cylinder and a sphere. ### Double Convex Lens

"The double convex lens may be described as the part common to two spheres that intersect each other.… ### 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. ### Spheres of the Ptolemaic System

A diagram showing the order of the universe as expounded by Ptolemy. Its basic concept surmises that… ### 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 With Sectors and Arcs

Illustration of a sphere with sectors and arcs. ### 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. ### 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… ### Development Of Sphere

Illustration showing the development of a sphere by the perspective of its resolved cones. ### Hollow Sphere

An illustration of a hollow sphere. ### Sphere Inscribed in a Cube

Illustration of a sphere inscribed in a cube. ### Sphere Inscribed in a Cube

Illustration of a sphere inscribed in a cube. ### 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… ### Sphere Made by Revolution of Semicircle

Illustration of a sphere generated by the revolution of a semicircle ACB about its diameter AB as an… ### Material Sphere

Illustration of a material sphere that can be used to find its diameter. ### 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. ### Segment Of Sphere

An illustration of a segment of a sphere. ### Wooden Sphere

A wooden hollow sphere created by using a lathe and wooden templet at a desired diameter. ### Zone Of Sphere

An illustration of a zone of a sphere. ### 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. ### Intersecting Spheres

Illustration of two intersecting spheres. "The intersection of two spherical surfaces is the circumference… ### Measure of a Spherical Angle

Diagram used to prove the theorem: "A spherical angle is measured by the arc of a great circle described… ### Flanged Spherical Segment

An illustration of a flanged spherical segment with a diameter of 10 inches. Illustration could be used… ### Volume of Spherical Segment

Diagram used to prove the theorem: "The volume of a spherical segment is equal to the sum of two cylinders… ### Side Comparison of Spherical Triangle

Diagram used to prove the theorem: "In a spherical triangle, the greater side is opposite the greater… ### Superimposed Symmetrical Spherical Triangles

Diagram showing 2 superimposed symmetrical spherical triangles. ### Symmetrical Spherical Triangles

Diagram showing 2 symmetrical spherical triangles.