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A characteristic a-separate compound coral. The columns are prismatic and their walls pierced by regular pores. Internally the tubes are divided by horizontal plates or tabulae. This is an important limestone builder in the Palaeozoic.

Compound Coral

A characteristic a-separate compound coral. The columns are prismatic and their walls pierced by regular…

Illustration of a right circular cylinder with a smaller cylinder removed from the center and placed next to it.

Cylinder Cut From a Cylinder

Illustration of a right circular cylinder with a smaller cylinder removed from the center and placed…

Illustration of a hollow cylinder.

Hollow Cylinder

Illustration of a hollow cylinder.

Illustration of a thin hollow cylinder. It resembles a washer and is often referred to as a disc.

Hollow Cylinder

Illustration of a thin hollow cylinder. It resembles a washer and is often referred to as a disc.

Illustration of a hollow cylinder viewed at an angle.

Hollow Cylinder

Illustration of a hollow cylinder viewed at an angle.

Illustration of a hollow cylinder viewed at an angle from above.

Hollow Cylinder

Illustration of a hollow cylinder viewed at an angle from above.

Illustration of a right circular cylinder.

Right Circular Cylinder

Illustration of a right circular cylinder.

Illustration of a right circular cylinder with the height larger than the diameter.

Right Circular Cylinder

Illustration of a right circular cylinder with the height larger than the diameter.

Illustration of 2 right circular cylinders in which one cylinder is twice the height of the other.

2 Right Circular Cylinders

Illustration of 2 right circular cylinders in which one cylinder is twice the height of the other.

Illustration of 2 right circular cylinders in which one cylinder is twice the height and twice the diameter of the other.

2 Right Circular Cylinders

Illustration of 2 right circular cylinders in which one cylinder is twice the height and twice the diameter…

Illustration of 3 right congruent tangent circular cylinders. The height of all the cylinders is greater than the diameter of the base.

3 Congruent Tangent Right Circular Cylinders

Illustration of 3 right congruent tangent circular cylinders. The height of all the cylinders is greater…

Illustration of 3 right congruent tangent circular cylinders.

3 Congruent Tangent Right Circular Cylinders

Illustration of 3 right congruent tangent circular cylinders.

Illustration of 3 right congruent tangent circular cylinders. The height of all the cylinders is greater than the diameter of the base.

3 Congruent Tangent Right Circular Cylinders

Illustration of 3 right congruent tangent circular cylinders. The height of all the cylinders is greater…

Illustration of 4 congruent tangent right circular cylinders. The height of all the cylinders is greater than the diameter of the base.

4 Congruent Tangent Right Circular Cylinders

Illustration of 4 congruent tangent right circular cylinders. The height of all the cylinders is greater…

The pressure at the bottom of an apparatus due to the weight of the liquid is dependent of the height of the liquid, not its shape. So, if an apparatus has a number of tubes, then the water in each tube will be the same height regardless of shape

Water Level

The pressure at the bottom of an apparatus due to the weight of the liquid is dependent of the height…

Any long tube or hollow body.

Pipe

Any long tube or hollow body.

"A conduit or canal constructed, especially in a town or city, to carry off superfluous, water, soil, and other matters; a public drain. A, B, C, D, E forms used in London, Paris, and other European cities; F, G, H, I, J, K, L, special forms used in New York and other American cities. F shows a method of repairing with tiles at the bottom of an oval sewer. G, tile-bottomed sewer. H, barrel sewer...of wood bound with iron. I, a form used for large sewers. J, section of pipe sewer. K, half section of sewer having section similar to B, but also provided with a spandrel. L, the aqueduct form, used for large sewers only, it rests on a bed of concrete." —Whitney, 1889

Collection of Sewer Cross-Sections

"A conduit or canal constructed, especially in a town or city, to carry off superfluous, water, soil,…

"A double nut which has right-hand and left-hand threads for attaching the joint-ends of rods or tubes; a union. a, a1, rods or pipes to be joined, a having a right-hand screw and a1 a left-hand screw, to which screws the right and left sleeve-nut b is fitted." -Whitney, 1889

Sleeve Nut

"A double nut which has right-hand and left-hand threads for attaching the joint-ends of rods or tubes;…

This worm is also called a fan worm, plume worm or red tube worm. <p> "A Linnean genus of worms, subsequently used with various restrictions, now type of the family <i>Serpulidae</i>. They are cephalobranchiate tubicolous annelids, inhabiting cylindrical and serpentine or tortuous calcareous tubes, often massed together in a confused heap, and attached to rocks, shells, etc. in the sea." -Whitney, 1889

Calcareous Tubeworm (Serpula)

This worm is also called a fan worm, plume worm or red tube worm. "A Linnean genus of worms, subsequently…