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

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…

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…

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

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

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

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…

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…

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

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

"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…

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…

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…

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

"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…

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).

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).

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

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

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.

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

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…

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

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