"Diagram of the metamorphosis of the free, tailed larva into the fixed Ascidian. A, stage of free-swimming larva; B, larva recently fixed; C, older fixed stage. adh, adhesive papillae; atr, atrial cavity; cil. gr, ciliated groove; end, endostyle; ht, heart; med, ganglion of trunk; n. gn, nerve-ganglion; noto, notochord; or, oral aperture; rect, reectum; sens ves, sense vesicle; stig, stigmata; stol, stolon; t, tail." -Parker, 1900

Ascidian Stages

"Diagram of the metamorphosis of the free, tailed larva into the fixed Ascidian. A, stage of free-swimming…

The barnacle is a type of fixed crustacean.

Barnacle

The barnacle is a type of fixed crustacean.

"Compound pulleys using one fixed and two moveable pulleys to pull a weight up by applying a downward force." -Avery 1895

Compound Pulley

"Compound pulleys using one fixed and two moveable pulleys to pull a weight up by applying a downward…

A jib crane is a type of crane where a horizontal member (jib or boom), supporting a moveable hoist, is fixed to a wall or to a floor-mounted pillar. Jib cranes are used in industrial premises and on military vehicles. The jib may swing through an arc, to give additional lateral movement, or be fixed. Similar cranes, often known simply as hoists, were fitted on the top floor of warehouse buildings to enable goods to be lifted to all floors.

Jib Crane

A jib crane is a type of crane where a horizontal member (jib or boom), supporting a moveable hoist,…

F, fixed coil; D, movable coil; S, spiral spring; T, Torsion head; MM, Mercury cups; I, Index needle.

Siemens Electrodynamometer

F, fixed coil; D, movable coil; S, spiral spring; T, Torsion head; MM, Mercury cups; I, Index needle.

"A moveable pulley is seldom used alone. It is generally combined with a fixed pulley, as shown [here]." —Quackenbos 1859

Fixed and Moveable Pulley

"A moveable pulley is seldom used alone. It is generally combined with a fixed pulley, as shown [here]."…

"A pulley is a wheel having a grooved rim for carrying a rope or other line, and tuning on an axis carried in a frame, called a pulley block. The pulley is fixed if the block is stationary." — Avery, 1895

Fixed Pulley

"A pulley is a wheel having a grooved rim for carrying a rope or other line, and tuning on an axis carried…

"A fixed pulley is one whose block is not movable. In this case, if the weight W be lifted by pulling down P, the other end of the cord W will evidently move the same distance upwards that P moves downwards; hence, P must equal W." — Hallock, 1905

Fixed Pulley

"A fixed pulley is one whose block is not movable. In this case, if the weight W be lifted by pulling…

"[This illustration] represents a fixed pulley. The block is attached to a projecting beam. P is the power, and W the weight. For every inch that P descends, W ascends the same distance." —Quackenbos 1859

Fixed Pulley

"[This illustration] represents a fixed pulley. The block is attached to a projecting beam. P is the…

"Holophotal Fixed Light varied by Flashes.—Fresnel's double agents are here also dispensed with by the single agency of panels of fixed light apparatus p', p' and cylindrical refractors L', L', alternating with panels of holophotal apparatus p, p, L, L, both of which revolve together round the central burner." —The Encyclopedia Britannica, 1910

Holophotal Light

"Holophotal Fixed Light varied by Flashes.—Fresnel's double agents are here also dispensed with…

"An inclined plane is a smooth, hard, inflexible surface, inclined so as to make an oblique angle with the horizon." -Avery 1895

Inclined Plane

"An inclined plane is a smooth, hard, inflexible surface, inclined so as to make an oblique angle with…

Illustration showing a line that moves so that its ends constantly touch two fixed lines which are perpendicular to each other. Locus of the midpoint.

Circle Made by Ends of a Line Touching Two Fixed Lines Perpendicular to Each Other

Illustration showing a line that moves so that its ends constantly touch two fixed lines which are perpendicular…

"System of moveable pulleys. Each pulley has a separate rope attached to a fixed support at one end." —Quackenbos 1859

Movable Pulleys

"System of moveable pulleys. Each pulley has a separate rope attached to a fixed support at one end."…

"When a high degree of force is required, several moveable pulleys may be combined, as represented [here]. A and B are fixed pulleys; C and D are moveable ones, from the block of which the weight W is suspended" —Quackenbos 1859

Multiple Pulleys

"When a high degree of force is required, several moveable pulleys may be combined, as represented [here].…

"The nut, N, through which the screw passes, answers also for one of the beams of the press. If the screw be turned to the right, it wil advance downwards, while the nut stands still." -Comstock 1850

Nut Fixed Screw

"The nut, N, through which the screw passes, answers also for one of the beams of the press. If the…

"A pulley is a grooved wheel, around which a rope is passed, and is either fixed or moveable." — Goodrich, 1844

Pulley

"A pulley is a grooved wheel, around which a rope is passed, and is either fixed or moveable." —…

"In this, the screw is fixed, while the nut, N, by being turned by the lever, L, from right to left, will advance down the screw." -Comstock 1850

Screw Fixed Screw

"In this, the screw is fixed, while the nut, N, by being turned by the lever, L, from right to left,…

"...represents a simple pulley, with a single fixed wheel. In other forms of the machine, the wheel moves up and down with the weight." -Comstock 1850

Simple Pulley

"...represents a simple pulley, with a single fixed wheel. In other forms of the machine, the wheel…

"Two fixed pulleys used to raise W." -Comstock 1850

Simple Pulley

"Two fixed pulleys used to raise W." -Comstock 1850

"Start a trough from A. At the moment of its reflection as a crest a B, start a crest at A as shown. The two crests will meet near the middle of the rope. The crest at the point and moment of meeting results from two forces acting in the same direction; their resultatnt is greater than either of the components." -Avery 1895

Constructive Interference

"Start a trough from A. At the moment of its reflection as a crest a B, start a crest at A as shown.…

"Suport a soft cotton rope several yards long between two fixed supports, as the opposite sides of the room, or the floor and the ceiling. With a ruler, strike the rope a blow near one end so as to form a crest, as shown. Vary the tension of the rope if necessary, until the crest is easily seem. Notice the crest, c, travels from A to B, where it is reflected back to A as a trough, t." -Avery 1895

Fixed Wave Reflection

"Suport a soft cotton rope several yards long between two fixed supports, as the opposite sides of the…