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"If the conducting wire is bent into the form shown, the lines of force will pas around the wire from one face of the loop to the other, and in the direction indicated by the 'rule of thumb' just given." -Avery 1895

Magnetic Field Around a Current Carrying Wire

"If the conducting wire is bent into the form shown, the lines of force will pas around the wire from…

"Lines of force of a circular loop. If a current flow through the loop in the direction indicated, the lines of force both inside and outside the loop, will cross the plane of the loop at right angles, and all those which cross the loop on the inside will pass through the plane in one direction...while all on the outside will return through the plane in the opposite direction." -Hawkins, 1917

Lines of Force

"Lines of force of a circular loop. If a current flow through the loop in the direction indicated, the…

"Illustrating Maxwell's 'corkscrew rule' for relative directions of current and lines of force...a current flow through the wire ab in the direction from a to b, the magnetic lines will encircle the wire in the direction of the curved arrow ro which shows the direction in which the corkscrew must be turned to advance in the direction of the arrow n." -Hawkins, 1917

Maxwell's Corkscrew Rule

"Illustrating Maxwell's 'corkscrew rule' for relative directions of current and lines of force...a current…

"And he gave unto Moses, when he had made an end of communing with him upon mount Sinai, the two tables of the testimony, tables of stone, written with the finger of God." Exodus 31:18 ASV <p>Illustration of God handing Moses the New Law on tablets of stone. Moses kneels on Mount Sinai and reaches up to God, who appears in a cloud. Five angels, three on one side of God and two on the other, play trumpets pointed down to earth. The Israelites can be seen camped at the bottom of the mountain. The golden calf is visible.

Moses Receives the Ten Commandments on Two Tablets of Stone

"And he gave unto Moses, when he had made an end of communing with him upon mount Sinai, the two tables…

"Right hand rule to determine the direction of magnetic field around a conductor carrying a current. The thumb of the right hand is placed along the conductor, pointing in the direction in which the current is flowing, then...the finger tips will point in the direction of the magnetic whirls." -Hawkins, 1917

Right Hang Rule

"Right hand rule to determine the direction of magnetic field around a conductor carrying a current.…

"Right hand palm rule to determine the direction of the magnetic field around a conductor carrying a current." -Hawkins, 1917

Right Hand Rule

"Right hand palm rule to determine the direction of the magnetic field around a conductor carrying a…

"A rule for direction of induced current which in some cases, is more conveniently applied than Fleming's rule." -Hawkins, 1917

Right Hand Rule

"A rule for direction of induced current which in some cases, is more conveniently applied than Fleming's…

"Fleming's rule for direction of induced current. Extend the thumb, forefinger and middle finger of the right hand [as shown]. Place the hand [so that] the thumb will point in the direction in which the conductor moves, the forefinger in the direction of the lines of force (N to S), then will the middle finger point in the direction in which the induced current flows." -Hawkins, 1917

Right Hand Rule of Induced Current

"Fleming's rule for direction of induced current. Extend the thumb, forefinger and middle finger of…

"The palm rule for direction of induced current: If the palm of the right hand be held against the direction of the lines of force, the thumb in the direction of the motion, then the fingers will point in the direction of the induced current." -Hawkins, 1917

Right Hand Rule, Palm

"The palm rule for direction of induced current: If the palm of the right hand be held against the direction…

"Right hand rule for polarity of a solenoid: If the solenoid be grasped in the right hand, so that the fingers point in the direction in which the current is flowing in the wires, the thumb extended will point in the direction of the north pole [of the solenoid]." Hawkins, 1917

Right Hand Rule, Solenoid

"Right hand rule for polarity of a solenoid: If the solenoid be grasped in the right hand, so that the…

A decimeter rule.

Decimeter rule

A decimeter rule.

Standard steel ruler.

Steel Rule

Standard steel ruler.

A straightedged strip, as of wood or metal, for drawing straight lines and measuring lengths.

Drawing Ruler

A straightedged strip, as of wood or metal, for drawing straight lines and measuring lengths.