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Illustrated are various shapes of cabbage. These shapes include flat, round or ball, egg shaped, oval, and conical.

Cabbage Shapes

Illustrated are various shapes of cabbage. These shapes include flat, round or ball, egg shaped, oval,…

Pictured are several forms of onion: (1) flat, (2) long globe, (3) globe, (4) oblong, and (5) oblate.

Forms of Onion

Pictured are several forms of onion: (1) flat, (2) long globe, (3) globe, (4) oblong, and (5) oblate.

This image shows one of Friedrich Froebel's divided cube (this one divided into eight smaller parallelograms). Froebel's cubes were used to encourage creativity in kindergarten-age children. The children could rearrange the smaller shapes into combinations that showed life, knowledge, and beauty.

Froebel's Divided Cube (Eight Smaller Parallelograms)

This image shows one of Friedrich Froebel's divided cube (this one divided into eight smaller parallelograms).…

This image shows one of Friedrich Froebel's divided cube (this one divided into many smaller cubes and prisms). Froebel's cubes were used to encourage creativity in kindergarten-age children. The children could rearrange the smaller shapes into combinations that showed life, knowledge, and beauty.

Froebel's Divided Cube (Complex)

This image shows one of Friedrich Froebel's divided cube (this one divided into many smaller cubes and…

Three shapes of sweet potato leaves. On left, cut-leaf type; in center, shouldered leaf; and on right, entire or "round" leaf.

Sweet Potato Leaves

Three shapes of sweet potato leaves. On left, cut-leaf type; in center, shouldered leaf; and on right,…

"A large nail or pin, generally of iron. The larger forms of spikes, particularly railroad spikes, are chisel-pointed, and have a head or fang projecting to one side to bite the rail. Spikes are also made split, barbed, grooved, and of other shapes." &mdash;Whitney, 1889 <p>Illustration of a dock spike, used in building docks and piers.

Dock Spike

"A large nail or pin, generally of iron. The larger forms of spikes, particularly railroad spikes, are…

"A large nail or pin, generally of iron. The larger forms of spikes, particularly railroad spikes, are chisel-pointed, and have a head or fang projecting to one side to bite the rail. Spikes are also made split, barbed, grooved, and of other shapes." &mdash;Whitney, 1889 <p>Illustration of cut spike, also called a large cut nail.

Cut Spike

"A large nail or pin, generally of iron. The larger forms of spikes, particularly railroad spikes, are…

"A large nail or pin, generally of iron. The larger forms of spikes, particularly railroad spikes, are chisel-pointed, and have a head or fang projecting to one side to bite the rail. Spikes are also made split, barbed, grooved, and of other shapes." &mdash;Whitney, 1889 <p>Illustration of two railway spikes, used to fasten the rails to sleepers.

Railway Spikes

"A large nail or pin, generally of iron. The larger forms of spikes, particularly railroad spikes, are…

"A large nail or pin, generally of iron. The larger forms of spikes, particularly railroad spikes, are chisel-pointed, and have a head or fang projecting to one side to bite the rail. Spikes are also made split, barbed, grooved, and of other shapes." &mdash;Whitney, 1889 <p>Illustration of a barbed spike.

Barbed Spike

"A large nail or pin, generally of iron. The larger forms of spikes, particularly railroad spikes, are…

"A large nail or pin, generally of iron. The larger forms of spikes, particularly railroad spikes, are chisel-pointed, and have a head or fang projecting to one side to bite the rail. Spikes are also made split, barbed, grooved, and of other shapes." &mdash;Whitney, 1889 <p>Illustration of a spike that is both barbed and forked.

Barbed and Forked Spike

"A large nail or pin, generally of iron. The larger forms of spikes, particularly railroad spikes, are…

"A large nail or pin, generally of iron. The larger forms of spikes, particularly railroad spikes, are chisel-pointed, and have a head or fang projecting to one side to bite the rail. Spikes are also made split, barbed, grooved, and of other shapes." &mdash;Whitney, 1889 <p>Illustration of two forked spikes. When driven into wood, the points spread and hook into the wood.

Forked Spikes

"A large nail or pin, generally of iron. The larger forms of spikes, particularly railroad spikes, are…