ClipArt ETC
Argonaut, side view submerged, 1901. Key: C-driving wheel, E-rudder and guiding wheel, G-air lock, K-compartment for searchlight, L-forward lookout compartment, M-gasoline tanks, N-compressed air reserve, O-water ballast, S-conning-tower, T-compass, U-outside steering gear.

Argonaut, side view

Argonaut, side view submerged, 1901. Key: C-driving wheel, E-rudder and guiding wheel, G-air lock, K-compartment…

The richest instrument in compass and in variety of timbre of all the wind instruments. Its tube is absolutely cylindrical, open and its column of air is set in vibration by a single flexible reed.

Clarinet

The richest instrument in compass and in variety of timbre of all the wind instruments. Its tube is…

A valved brass wind instruments that resemble the bugle and have a full even tone and wide compass.

Alto Saxhorn

A valved brass wind instruments that resemble the bugle and have a full even tone and wide compass.

Diagram of a ship's compass.

Compass, Ship's

Diagram of a ship's compass.

Compass card, part of ship's compass.

Compass Card

Compass card, part of ship's compass.

"A Binnacle, corrupted from bittacle, a wooden case or box in which the compass on board a ship is kept to protect it from injury."—(Charles Leonard-Stuart, 1911)

Binnacle

"A Binnacle, corrupted from bittacle, a wooden case or box in which the compass on board a ship is kept…

"The Trombone is a large, deep, and loud-toned instrument of the trumpet kind, the name being an augmentative of tromba, a trumpet. It consists of two tubes, so constructed that one may slide in and out of the other, and thus form one tube that can be lengthened at will and made of varying pitch. There are three kinds of trombones, called after their compass the alto, tenor, and bass trombones."—(Charles Leonard-Stuart, 1911)

Tenor Trombone

"The Trombone is a large, deep, and loud-toned instrument of the trumpet kind, the name being an augmentative…

Smith showing compass to the Native Americans

Smith

Smith showing compass to the Native Americans

"It has four cardinal points, N, E, S, and W marked, as well as a circle graduated in degrees from sero to 360 degrees, clockwise around the circle." — Moss, 1914

Box compass

"It has four cardinal points, N, E, S, and W marked, as well as a circle graduated in degrees from sero…

"The principal of a tourniquet is easily understood, a pad or compass placed on the line of the artery and a strap or band to go over the pad and around the limb so that, when tightened, it will press the pad down upon the artery and interrupt the flow of the blood." — Moss, 1914

Tourniquet

"The principal of a tourniquet is easily understood, a pad or compass placed on the line of the artery…

A instrument used for navigation. The needle is magnetic and always points to the north pole.

Compass

A instrument used for navigation. The needle is magnetic and always points to the north pole.

A pair of hands, each holding a narrow bit of wire over a compass needle.

Hands with wires

A pair of hands, each holding a narrow bit of wire over a compass needle.

"Bring the two ends of the wire into contact, and thus close the circuit. The needle instantly flies around as though it was trying to place itself at right angles to the wire. Break the circuit, and the needle swings back to its north and south position. Twist the wires together, and bend the conductor into a loop so that the current passes above the needle in one direction and beneath the needle in the other direction. The deflection of the needle will be greater than before." — Avery, 1895

Needle, compass

"Bring the two ends of the wire into contact, and thus close the circuit. The needle instantly flies…

A magnetic compass.

Compass

A magnetic compass.

"Secure the two ends of the wire by double-pointed tacks. Place a small pocket compass upon the block thus wound, and turn the block until the coils of wire are parallel to the needle when the circuit is open. Then pass a current through the coil. The deflection of the needle is much stronger than before, although, owing to the weakening of the cell, the deflection falls off after a time." — Avery, 1895

Galvanoscope

"Secure the two ends of the wire by double-pointed tacks. Place a small pocket compass upon the block…

"A small bar magnet suspended in such a manner as to allow it to assume its chosen position relative to the earth is a magnetic needle. The needle may turn in a horizontal plane, it is a horizontal needle; e.g., the mariner's or the surveyor's compass. If it turns freely in a vertical plane, it constitutes a dipping-needle." — Avery, 1895

Dipping needle

"A small bar magnet suspended in such a manner as to allow it to assume its chosen position relative…

"The horizontal angular distance between two meridians. <em>Magnetic A.</em> the horizontal angular distance of the magnetic from the geographical meridian. <em>A. compass</em>; a variety of ship's compass." &mdash; Williams, 1889

Azimuth

"The horizontal angular distance between two meridians. Magnetic A. the horizontal angular…

"A kind of compass for measuring the diameter of round bodies." &mdash; Williams, 1889

Calipers

"A kind of compass for measuring the diameter of round bodies." — Williams, 1889

A tool to know your direction.

Compass

A tool to know your direction.

A compass that tells direction.

Compass

A compass that tells direction.

An illustration with multiple instruments used for navigation. These items include a globe, compass, map and books.

Globe

An illustration with multiple instruments used for navigation. These items include a globe, compass,…

An instrument consisting essentially of a dipping needle, a verticle graduated circle whose center coincides with the axis of the needle, and a graduated horizontal circle, the whole being supported by a tripod. Also called an inclinometer.

Dipping Compass

An instrument consisting essentially of a dipping needle, a verticle graduated circle whose center coincides…

An early compass.

Compass

An early compass.

A historical astronomical instrument used to predict positions of the Sun, Moon, planets and stars.

Regiomontanus' Astrolabe

A historical astronomical instrument used to predict positions of the Sun, Moon, planets and stars.

A historical astronomical instrument used to predict positions of the Sun, Moon, planets and stars.

Later Astrolabe

A historical astronomical instrument used to predict positions of the Sun, Moon, planets and stars.

An instrument which could more readily adapt itself to the swaying of the observer's body in a sea-way, soon displaced in good measure the astrolabe on shipboard. It in several ways modified forms for a long time served mariners as a convenient help in ascertaining the altitude of the celestial bodies. Precisely when it was first introduced is not certain; but the earliest description of it which has been found is that of Werner in 1514.

Jackstaff

An instrument which could more readily adapt itself to the swaying of the observer's body in a sea-way,…

An improvement upon the jackstaff from Davis, the Arctic navigator.

Backstaff

An improvement upon the jackstaff from Davis, the Arctic navigator.

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil and pen point are provided, either of which may be inserted into a socket in one leg of the instrument, for the drawing of circles in pencil or ink." &mdash; Hallock, 1905

Compasses

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil…

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil and pen point are provided, either of which may be inserted into a socket in one leg of the instrument, for the drawing of circles in pencil or ink." &mdash; Hallock, 1905

Compasses

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil…

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil and pen point are provided, either of which may be inserted into a socket in one leg of the instrument, for the drawing of circles in pencil or ink." &mdash; Hallock, 1905

Compasses

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil…

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil and pen point are provided, either of which may be inserted into a socket in one leg of the instrument, for the drawing of circles in pencil or ink." &mdash; Hallock, 1905

Compasses

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil…

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil and pen point are provided, either of which may be inserted into a socket in one leg of the instrument, for the drawing of circles in pencil or ink." &mdash; Hallock, 1905

Compasses

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil…

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil and pen point are provided, either of which may be inserted into a socket in one leg of the instrument, for the drawing of circles in pencil or ink." &mdash; Hallock, 1905

Compasses

"The compasses, next to the T square and triangles, are used more than any other instrument. A pencil…

"Three principal parts, the card, the needle on its lower suface, and the case. The whole is enclosed in the compass-box, or binnacle. the term compass is said to have been applied to the instrument because the card involves or compasses the whole plane of the horizon, or because the needle indicates the whole circle of possible variations of direction. The surface of the card is divided by radiating lines into 32 parts, each containing 11 degrees." &mdash; Encyclopedia Britannica, 1893

Compass Card

"Three principal parts, the card, the needle on its lower suface, and the case. The whole is enclosed…

"Plan and Transverse Section of Sir William Thomson's Compass-card. B, Corrector for quadrantal error; C, Box for corrector; a, Aluminium boss; b, Central cap of sapphire; c, Cords connecting rim and boss; d, Magnets; e, Threads connecting magnets; f, Aluminium rim; f, Cords supporting magnets; g,g', Knife edges for gimbals." &mdash; Encyclopedia Britannica, 1893

Compass Card

"Plan and Transverse Section of Sir William Thomson's Compass-card. B, Corrector for quadrantal error;…

"The sine electrometer of August, is a modification of the single pendulum electroscope, analogous in principle to Pouillet's sine compass. A is a pendulum suspended by two threads to secure motion in one plane; B is a ball fixd to the case, and connected with a suitable electrode." &mdash; Encyclopedia Britannica, 1893

Sine Electrometer

"The sine electrometer of August, is a modification of the single pendulum electroscope, analogous in…

"Compass, Mariner's, is the name given to the instrument by which sailors are enabled to steer their course on the ocean out of sight of land, and when neither sun nor stars are visible. the ancients, to whom it was unknown, could seldom venture to lose sight of the coast. The direct power of the magnet seems to have been unknown in Europe till late in the 12th century." &mdash; Chambers' Encyclopedia, 1875

Compass

"Compass, Mariner's, is the name given to the instrument by which sailors are enabled to steer their…

"Upon a tripod provided with levelling screws stands the pillar P, to which is fixed the graduated azimuthal circle CC. The compass box B, with the vernier V, attached to it, moves on the azimuthal circle by means of a pivot at the pillar P. Two uprights, U, U, are fixed to the side of the compass-box, on the tops of which rests the axis of the telescope T. A graduated are A, is fixed to the bottom of one of the uprights, and the angle of elevation of the telescope is marked by the vernier on the arm E, attached to the axis of the telescope. A level, L, is also hung on the axis of the telescope, for adjusting the instrument. Inside the compass-box is another graduated circle, F, the line joining the zero-points of which is parallel to the axis of the telescope. All the fittings are in brass or copper, iron, of course, being unsuitable." &mdash; Chambers' Encyclopedia, 1875

Declinometer

"Upon a tripod provided with levelling screws stands the pillar P, to which is fixed the graduated azimuthal…

A tool used to tell direction.

Compass

A tool used to tell direction.

"Condensing Straight Prisms.&mdash;These, either by reflexion or refraction or both, cause a ray fr proceeding in any compass bearing from a fixed light apparatus AA to emerge in the direction, e.g., parallel to the corresponding ray fb, which proceeds in the same compass bearing from another part of the apparatus and so of any other ray fc which is bent parallel to the ray fa." &mdash;The Encyclopedia Britannica, 1910

Straight Prisms

"Condensing Straight Prisms.—These, either by reflexion or refraction or both, cause a ray fr…

A compass placed in some convenient part of a ship on the midship line and provided with vanes, screws, and other apparatus for observing the bearings of heavenly and terrestrial objects.

Azimuth Compass

A compass placed in some convenient part of a ship on the midship line and provided with vanes, screws,…

"At sea the declination is generally observed by means of an azimuth compass invented by Kater. It consists of a magnet with a graduated compass card attached to it. At the side of the instrument opposite the eye there is a frame which projects upwards from the plane of the instrument in a nearly vertical direction, and this frame contains a wide rectangular slit cut into two parts by a wire extending lengthwise. The eye-piece is opposite this frame, and the observer is supposed to point the instrument in such a manner that the wire above mentioned shall bisect the sun's visible disk. There is a totally reflecting glass prism which throws into the eye-piece an image of the scale of the graduated card, so that the observer, having first bisected the sun's disk by the wire, must next read the division of the scale which is in the middle of the field of view." &mdash;The Encyclopedia Britannica, 1903

Azimuth Compass

"At sea the declination is generally observed by means of an azimuth compass invented by Kater. It consists…

A tool used for navigating

Navigation

A tool used for navigating

Still life arrangement including a globe, telescope, book, right angle, rolled map, and dividers.

Still Life with Globe and Telescope

Still life arrangement including a globe, telescope, book, right angle, rolled map, and dividers.

If a magnetized bar or needle be suspended at its centre of gravity so as to move freely in a horizontal plane, after a few oscillations it will come to rest, with one of it ends pointing nearly to the geographical north pole of the earth.

The Magnetic Needle

If a magnetized bar or needle be suspended at its centre of gravity so as to move freely in a horizontal…

Diagram of points on a compass.

Compass Points

Diagram of points on a compass.

A wooden case or box in which the compass on board a ship is kept to protect it from injury. A light is placed within it at night to insure that its indications are seen. It is placed immediately in front of the wheel or steering apparatus, and secured to the deck, usually by metal stays. The after portion has glass windows, so that the compass is at all times visible to the helmsman, who stands at the wheel.

Binnacle

A wooden case or box in which the compass on board a ship is kept to protect it from injury. A light…

Three suspended concentric circles free to move independently of each other at right angles.

Gyroscope

Three suspended concentric circles free to move independently of each other at right angles.

Different compasses used in mechanical drawing.

Compasses

Different compasses used in mechanical drawing.

The use of a compass in drawing perfect circles

Compass Use

The use of a compass in drawing perfect circles

Hairspring dividers are for creating bisectors of circles. They are similar to a compass, but with two points and no pencil.

Dividers

Hairspring dividers are for creating bisectors of circles. They are similar to a compass, but with two…

Method to draw the bisector of a line

Bisect A Line

Method to draw the bisector of a line

Method to bisect an angle

Bisect An Angle

Method to bisect an angle

Method to construct an equilateral triangle

Construct Equilateral Triangle

Method to construct an equilateral triangle

Method to construct a scalene triangle

Construct Scalene Triangle

Method to construct a scalene triangle

Draftsman's method to draw a tangent, AB, to a circle

Tangent To A Circle

Draftsman's method to draw a tangent, AB, to a circle

Draftsman's method to draw a line tangent to two given circles

Tangent To Two Circles

Draftsman's method to draw a line tangent to two given circles

Draftsman's first method for drawing a parabola

Parabola First Method

Draftsman's first method for drawing a parabola

Draftsman's first method to draw a parabola

Hyperbola First Method

Draftsman's first method to draw a parabola

"The magnetic poles of the earth do notc oincide with its geographical poles and, condequently, in some places, the magnetic needle does not point ot the geographical north. The angle that the axis of a compass-bneedle makes with the geographical meridian at any place is called the declination or variation of the needle at that place...Lines drawn through places on the earth where the declination is the sam are called isogonic lines, as shown." -Avery 1895

Isogonic Lines of Earth

"The magnetic poles of the earth do notc oincide with its geographical poles and, condequently, in some…