Also known as Larix lyallii. A species of larch native to northwestern North America.

Alpine Larch Pine Cone

Also known as Larix lyallii. A species of larch native to northwestern North America.

Also known as Pinus arizonica. The pine cone of an Arizona Pine tree.

Pine Cone of Arizona Pine

Also known as Pinus arizonica. The pine cone of an Arizona Pine tree.

Also known as Abies balsamea. A North American fir, generally found in most of the eastern and central areas of the United States and Canada.

Pine Cone of Balsam Fir

Also known as Abies balsamea. A North American fir, generally found in most of the eastern and central…

Illustration of a conical bifrustum created by three parallel planes of circles with the middle plane largest. The top and bottom circles are congruent. It is constructed from two congruent frustums across a plane of symmetry.

Conical Bifrustum

Illustration of a conical bifrustum created by three parallel planes of circles with the middle plane…

Also known as Sequoia wellington.

Pine Cone of Big Tree

Also known as Sequoia wellington.

Also known as Pseudotsuga macrocarpa. A conifer native to southern California.

Pine Cone of Bigcone Douglas Fir

Also known as Pseudotsuga macrocarpa. A conifer native to southern California.

"Thuja orientalis; 1. a magnified fragment of a branch bearing a cone of male flowers; 2. a portion of a female branch; 3, 4. scales with naked ovules; 5. a vertical section of a ripe seed." -Lindley, 1853

Biota

"Thuja orientalis; 1. a magnified fragment of a branch bearing a cone of male flowers; 2. a portion…

Also known as Pinus muricata, mostly found in California.

Bishop Pine Cone

Also known as Pinus muricata, mostly found in California.

Also known as Picea mariana. A species of spruce native to North America.

Black Spruce Pine Cone

Also known as Picea mariana. A species of spruce native to North America.

Also known as Picea breweriana. A species of spruce tree native to western North America.

Brewer Spruce Pine Cone

Also known as Picea breweriana. A species of spruce tree native to western North America.

Also known as Pinus ponderosa. The pine cone of a Bull Pine tree.

Pine Cone of Bull Pine

Also known as Pinus ponderosa. The pine cone of a Bull Pine tree.

Also known as Tsuga canadensis. A coniferous tree native to eastern North America.

Branch of Canadian Hemlock

Also known as Tsuga canadensis. A coniferous tree native to eastern North America.

Also known as Pinus caribaea. The pine cone of a Caribbean Pine tree.

Pine Cone of Caribbean Pine

Also known as Pinus caribaea. The pine cone of a Caribbean Pine tree.

Also known as Tsuga caroliniana. An evergreen coniferous tree native to the Appalachian Mountains.

Pine Cone of Carolina Hemlock

Also known as Tsuga caroliniana. An evergreen coniferous tree native to the Appalachian Mountains.

The pine cone of the Chihuahua Pine tree.

Pine Cone of Chihuahua Pine

The pine cone of the Chihuahua Pine tree.

Also known as Pinus strobiformis. A pine cone of the Chihuahua White Pine tree.

Pine Cone of a Chihuahua White Pine

Also known as Pinus strobiformis. A pine cone of the Chihuahua White Pine tree.

Illustration showing a circle formed by the intersection of a plane perpendicular to the axis of the cone.

Circle

Illustration showing a circle formed by the intersection of a plane perpendicular to the axis of the…

Illustration showing the definition of a circle as a conic section. The section of a right circular cone made by a plane that is perpendicular to the axis (or parallel to the base).

Conic Section Showing A Circle

Illustration showing the definition of a circle as a conic section. The section of a right circular…

An illustration showing the intersection of a plane and a cone. The cone is intersected by a plane parallel to the base, forming a circle.

Conic Section Showing A Circle

An illustration showing the intersection of a plane and a cone. The cone is intersected by a plane parallel…

"Prior to the introduction of the cup and cone, a form of tunnel-head in which no valve or cone exists was employed. A hollow annular chamber BB is built in the upper portion of the stack, communicating by arched cavities A, A, A with the shaft, and also with the exit gas main C; a considerable fraction of the gases then passes out through the arched vavities when the materials are heaped up to the level of the charging door D. With small furnaces the wall between the shaft and the chamber B is made of past or wrought iron; in some cases the gas has been collected through a central tube in the axis of the shaft supported by groins springing from the shaft and the ore." — The Encyclopedia Britannica, 1893

Collecting Top

"Prior to the introduction of the cup and cone, a form of tunnel-head in which no valve or cone exists…

Also known as Pinus edulis. The pine cone of a Colorado Pinyon tree.

Pine Cone of Colorado Pinyon

Also known as Pinus edulis. The pine cone of a Colorado Pinyon tree.

"The contours of a concave (hollowed out) cone are close together at the center (top), and far apart at the outside (bottom)." — Moss, 1914

Contours of a concave cone

"The contours of a concave (hollowed out) cone are close together at the center (top), and far apart…

Each scale of the pine cone is a whole pistillate flower. (Gray, 1858).

Cone

Each scale of the pine cone is a whole pistillate flower. (Gray, 1858).

"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." — 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…

"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…

"Cone.--A particular kind of compound fruit, such as that of the pine tribe." -Newman, 1850

Cone

"Cone.--A particular kind of compound fruit, such as that of the pine tribe." -Newman, 1850

Sections of a cone. a, parabola; b, ellipse; c, hyperbola.

Cone

Sections of a cone. a, parabola; b, ellipse; c, hyperbola.

Illustration used to compare the volumes of a cone and a cylinder by emptying sand from the cone into the cylinder.

Comparative Volumes Of A Cone And Cylinder

Illustration used to compare the volumes of a cone and a cylinder by emptying sand from the cone into…

Illustration of a cone of revolution used to show that the lateral area is equal to half the product of the slant height by the circumference of the base.

Lateral Area of Cone of Revolution

Illustration of a cone of revolution used to show that the lateral area is equal to half the product…

The contours of a cone are circles of different sizes, one within another, and the same distance apart, because the slope is at all points the same." — Moss, 1914

Contours of a cone

The contours of a cone are circles of different sizes, one within another, and the same distance apart,…

Development and top completion exercise problem of the cone by dividing the base into equal parts and creating an arc to revolve the sides of the plane.

Development Exercise of Cone

Development and top completion exercise problem of the cone by dividing the base into equal parts and…

Pattern that can be used to make a cone. Development of a cone.

Development of a Cone

Pattern that can be used to make a cone. Development of a cone.

A rolled out image of a cone by dividing the base in equal parts and arcs to measure the true lengths.

Development of Cone

A rolled out image of a cone by dividing the base in equal parts and arcs to measure the true lengths.

Illustration of a frustum of a cone.

Frustum of a Cone

Illustration of a frustum of a cone.

Frustum of a cone.

Frustum of Cone

Frustum of a cone.

Frustum of a cone.

Frustum of Cone

Frustum of a cone.

"The lateral area of a frustum of a cone of revolution is equal to half the sum of the circumferences of its bases multiplied by the slant height."

Frustum of Cone to Find Lateral Area

"The lateral area of a frustum of a cone of revolution is equal to half the sum of the circumferences…

"The volume of a frustum of a circular cone is equivalent to the sum of the volumes of three cones whose common altitude is the altitude of the frustum and whose bases are the lower base, the upper base, and the mean proportional between the bases of the frustum."

Frustum of Cone to Find Volume

"The volume of a frustum of a circular cone is equivalent to the sum of the volumes of three cones whose…

Illustration of an oblique cone.

Oblique Cone

Illustration of an oblique cone.

Plan and elevation of a cone.

Plan and Elevation of a Cone

Plan and elevation of a cone.

Illustration of the intersection of a cone and a plane.

Intersection of a Cone and a Plane

Illustration of the intersection of a cone and a plane.

Illustration showing a cone cut by a plane that is along the axis of symmetry.

Plane Passing Through A Cone

Illustration showing a cone cut by a plane that is along the axis of symmetry.

Illustration of a plane parallel to the base passing through a cone (section made is a circle).

Plane Parallel to Base, Passing Through a Cone

Illustration of a plane parallel to the base passing through a cone (section made is a circle).

Illustration of a plane parallel to the base passing through a cone (section made is a circle).

Plane Parallel to Base, Passing Through a Cone

Illustration of a plane parallel to the base passing through a cone (section made is a circle).

Illustration of a plane passing through the vertex of a cone (section made is a triangle).

Plane Passing Through the Vertex of a Cone

Illustration of a plane passing through the vertex of a cone (section made is a triangle).

Illustration of a plane passing through the vertex of a cone (section made is a triangle).

Plane Passing Through the Vertex of a Cone

Illustration of a plane passing through the vertex of a cone (section made is a triangle).

Illustration of a pyramid circumscribed about a cone.

Pyramid Circumscribed About a Cone

Illustration of a pyramid circumscribed about a cone.

Illustration of a pyramid and with a regular polygon inscribed in and circumscribed about a cone. "If a pyramid whose base is a regular polygon is inscribed in or circumscribed about a circular cone, and if the number of sides of the base of the pyramid is indefinitely increased, the volume of the cone is the limit of the volume of the pyramid, and the lateral area of the cone is the limit of the lateral area of the pyramid."

Cone With Regular Polygon Inscribed and Circumscribed About

Illustration of a pyramid and with a regular polygon inscribed in and circumscribed about a cone. "If…

Illustration of a pyramid inscribed in a cone.

Pyramid Inscribed in a Cone

Illustration of a pyramid inscribed in a cone.

Illustration of a cone of revolution.

Cone of Revolution

Illustration of a cone of revolution.

Illustration of a right circular cone with the diameter of the base equal to the height of the cone.

Right Circular Cone

Illustration of a right circular cone with the diameter of the base equal to the height of the cone.

Illustration of a right circular cone with the diameter of the base greater than the height of the cone.

Right Circular Cone

Illustration of a right circular cone with the diameter of the base greater than the height of the cone.

Illustration of a right circular cone resting on an element such that the vertex is on the bottom and a vertical and horizontal element meet at a right angle.

Right Circular Cone on Side

Illustration of a right circular cone resting on an element such that the vertex is on the bottom and…

Illustration showing a cone rolled out on a plane.

Cone Rolled On Plane

Illustration showing a cone rolled out on a plane.

Illustration used to compare the volumes of a cone, a sphere, and a cylinder.

Comparative Volumes Of A Cone, Sphere, And Cylinder

Illustration used to compare the volumes of a cone, a sphere, and a cylinder.

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…

Illustration of 2 right circular cones that are similar.

2 Similar Right Circular Cones

Illustration of 2 right circular cones that are similar.

An exercise problem to complete the top and develop, stretched out, image of the flange and hood cones by using series of cone development.

Development Exercise of Flange and Hood Cones

An exercise problem to complete the top and develop, stretched out, image of the flange and hood cones…

Instantaneous axis of two cones, each with angular velocity

Conic Motion

Instantaneous axis of two cones, each with angular velocity

Two dimensional view of the cuts required to create the conic sections hyperbola, parabola, ellipse, and circle.

Conic Sections 2D

Two dimensional view of the cuts required to create the conic sections hyperbola, parabola, ellipse,…