"Argent, the lower half of the shield three bars wavy, azure. WAVY. Curved lines, undulating like the waves of the sea." -Hall, 1862

Bars Wavy

"Argent, the lower half of the shield three bars wavy, azure. WAVY. Curved lines, undulating like the…

Work of the waves in cutting away rocky coasts. Cliffs of Normandy; the coast has been cut back so far that the tributaries of the old river systems now enter the sea independently.

Cliffs of Normandy

Work of the waves in cutting away rocky coasts. Cliffs of Normandy; the coast has been cut back so far…

A curved wavy line.

Line, Curved Wavy

A curved wavy line.

Stylized Greek ship with waves and rocks.

Greek ship

Stylized Greek ship with waves and rocks.

As part of a mutiny, Henry Hudson is seized and set adrift along with the loyal carpenter and the sick crew members.

Henry Hudson

As part of a mutiny, Henry Hudson is seized and set adrift along with the loyal carpenter and the sick…

"Slit A is a very small opening. The light coming from the soldier on the right shines through the slit in straight lines making the image of the soldier inverted on wall W." —Quackenbos 1859

Inverted Image

"Slit A is a very small opening. The light coming from the soldier on the right shines through the slit…

Lighthouse in the water.

Lighthouse

Lighthouse in the water.

A line invected for dividing a field. "Escutcheons that have more than one tincture are divided by lines ... Curved and angular lines are numerous, and each has an Heraldic name expressive of its form." -Hall, 1862

Line Invected

A line invected for dividing a field. "Escutcheons that have more than one tincture are divided by lines…

Waves are swimming motions of the water, caused by the action of the wind. Their height and velocity deepen on the forces of the wind, and depth of the basin in which they occur. The stronger the wind, and the deeper the ocean, the higher the waves and the greater their velocity.

Ocean Wave

Waves are swimming motions of the water, caused by the action of the wind. Their height and velocity…

"Party per fess, engrailed, argent and gules. PARTY PER FESS. A shield parted in the centre by an horizontal line through the fess point." -Hall, 1862

Party Per Fess Engrailed

"Party per fess, engrailed, argent and gules. PARTY PER FESS. A shield parted in the centre by an horizontal…

"Sonometer used when studying waves." -Avery 1895

Sonometer

"Sonometer used when studying waves." -Avery 1895

"Apparatus used that will show changes in the flame upon the glass sheet M, when sound is introduced into the tube at A." -Avery 1895

Flame Sonometer

"Apparatus used that will show changes in the flame upon the glass sheet M, when sound is introduced…

"Enlarged sectional view of a ripple or train of waves." —Croft 1917

Wave

"Enlarged sectional view of a ripple or train of waves." —Croft 1917

"Using the rope...start a crest at A. At the moment of its reflection at B as a trough, start a second crest at A. The trough and crest will meet near the middle of the rope. the rope particles at this point, being thus simultaneously acted upon by opposite forces, will remain at rest or nearly so." -Avery 1895

Destructive Interference

"Using the rope...start a crest at A. At the moment of its reflection at B as a trough, start a second…

An illustration of waves demonstrating different nodes.

Waves

An illustration of waves demonstrating different nodes.

"...represents two sets of sound waves with like periods and phases but different amplitudes." -Avery 1895

Waves with Different Amplitudes with Equal Periods

"...represents two sets of sound waves with like periods and phases but different amplitudes." -Avery…

"Showing diagrammatically one explanation of the production of light waves by revolving electrons." —Croft 1917

Light Waves Explanation

"Showing diagrammatically one explanation of the production of light waves by revolving electrons."…

"Diagram indicating one explanation which has been advanced for light and heat waves generated by the movement of an electron around its orbit in a molecule and by the simultaneous movement of the molecule." —Croft 1917

Light Waves

"Diagram indicating one explanation which has been advanced for light and heat waves generated by the…

"...represents two such wave systems meeting in opposite phases." -Avery 1895

Waves with Opposite Phases

"...represents two such wave systems meeting in opposite phases." -Avery 1895

An illustration of various sound waves.

Sound Waves

An illustration of various sound waves.

An illustration of various sound waves.

Sound Waves

An illustration of various sound waves.