ClipArt ETC
"As the liquid flows out of each orifice, each stream follows a parabolic path based upon pressure of the liquid inside the container. Orifices A and C are equidistant, thus reach the same point." —Quackenbos 1859

Course of Streams

"As the liquid flows out of each orifice, each stream follows a parabolic path based upon pressure of…

"A block of stone perforated by the pholus dactylus." — Goodrich, 1859

Pholas dactylus

"A block of stone perforated by the pholus dactylus." — Goodrich, 1859

A small instrument for boring holes by turning it with the hand.

Gimlet

A small instrument for boring holes by turning it with the hand.

Boring holes around a bridge.

Hole

Boring holes around a bridge.

Illustration of a frustum of a pyramid having a rectangular base and a hole passing through the center of the frustum.

Frustum Of A Rectangular Pyramid With Hole

Illustration of a frustum of a pyramid having a rectangular base and a hole passing through the center…

"Rotate the disk slowly, blowing meanwhile through a tube of about 3/16 inch bore, the nozzle of the tube being held opposite the interior ring of holes. As each successive hold comes before the end of the tube, a puff of air goes through the disk. As the speed of the disk increases, the puffs become more frequent, and finally blend into a whizzing sound in which the ear can detect a smooth tone. As the disk is given an increasing velocity, this tone rises in pitch." -Avery 1895

Siren

"Rotate the disk slowly, blowing meanwhile through a tube of about 3/16 inch bore, the nozzle of the…