This apparatus is used to prove Boyle's Law which describes the relationship between the product pressure and volume within a closed system as constant when temperature remains at a fixed measure; both entities remain inversely proportional.

Proof of Boyle's Law for Expanding Air

This apparatus is used to prove Boyle's Law which describes the relationship between the product pressure…

Used as a form of humiliating punishment for angry women, a ducking stool was "a stool or chair in which common scolds were formerly tied and plunged into water." -Whitney, 1911

Ducking Stool

Used as a form of humiliating punishment for angry women, a ducking stool was "a stool or chair in which…

"Both as a lawyer and a statesman Mr. Evarts ranks high." —The Popular Cyclopedia, 1888

William M. Evarts

"Both as a lawyer and a statesman Mr. Evarts ranks high." —The Popular Cyclopedia, 1888

"Pascal's Law finds an important application in the hydraulic press, in the more common forms of which the pressure of a piston operated by a lever is transmitted through a pipe to a piston of larger area." -Avery 1895

Hydraulic Press

"Pascal's Law finds an important application in the hydraulic press, in the more common forms of which…

"Pascal's Law finds an important application in the hydraulic press, in the more common forms of which the pressure of a piston operated by a lever is transmitted through a pipe to a piston of larger area." -Avery 1895

Hydraulic Press, Perspective

"Pascal's Law finds an important application in the hydraulic press, in the more common forms of which…

An illustration of judge putting a law book on a scale.

Judge

An illustration of judge putting a law book on a scale.

James Kent (July 31, 1763 – December 12, 1847) was an American jurist and legal scholar from New York.

James Kent

James Kent (July 31, 1763 – December 12, 1847) was an American jurist and legal scholar from New…

John Law, Scottish economist.

John Law

John Law, Scottish economist.

"Experiment illustrating Lenz's Law. If a copper ring be held in front of an ordinary elecromagnet, and the current circulating through the coil of the magnet be in such a direction as to magnetize the core as indicated b the letters S N, then as the current increases in the coil more and more of the lines of force proceeeding from N pass through the ring OO from left to right." -Hawkins, 1917

Lenz's Law

"Experiment illustrating Lenz's Law. If a copper ring be held in front of an ordinary elecromagnet,…

(1755-1835) Chief Justice of the United States Supreme Court.

John Marshall

(1755-1835) Chief Justice of the United States Supreme Court.

John Marshall (September 24, 1755 – July 6, 1835) was an influential Chief Justice of the United States who shaped American constitutional law and made the Supreme Court a center of power.

John Marshall

John Marshall (September 24, 1755 – July 6, 1835) was an influential Chief Justice of the United…

"Pressure exerted anywhere upon a liquid inclosed in a vessel is transmitted undiminished in all direction, and acts with the same force upon all equal surfaces, and in a direction at right angles to those surfaces." -Avery 1895

Pascal's Law

"Pressure exerted anywhere upon a liquid inclosed in a vessel is transmitted undiminished in all direction,…

"...let the area of the piston a be 1 square inch; of b, 40 square inches. According to Pascal's law, 1 pound placed on a will balance 40 pounds placed on b." —Hallock 1905

Pascal's Law and Water Pressure

"...let the area of the piston a be 1 square inch; of b, 40 square inches. According to Pascal's law,…

"Let the are of the piston a be 20 square inches; of b, 7 sq. in.; of c, 1 sq. in.; of d, 6 sq. in.; of e, 8 sq. in; and of f, 4 sq. in. If... a force of five pounds be applied at c, a pressure of five pounds per square inch will be transmitted in all directions, and in order that there shall be no movement, the required pressure must be applied by all the other pistons in proportion." —Hallock 1905

Water Pressure Demonstration

"Let the are of the piston a be 20 square inches; of b, 7 sq. in.; of c, 1 sq. in.; of d, 6 sq. in.;…

A picture of the Senate Chamber in Washington D.C.

Senate Chamber

A picture of the Senate Chamber in Washington D.C.

(1811-1874) American statesman, jurist, politician

Charles Sumner

(1811-1874) American statesman, jurist, politician