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"Archaeocidaris Urii, Flem (spine and intermediate plate); Carboniferous, Ireland." — Encyclopedia Britannica, 1893

Fossil Echinidea

"Archaeocidaris Urii, Flem (spine and intermediate plate); Carboniferous, Ireland." — Encyclopedia…

"Cidaris florigemma, with spine, a, and single ambulacral plate, magnified, b, (after Wright; Coral Rag." — Encyclopedia Britannica, 1893

Fossil Echinidea

"Cidaris florigemma, with spine, a, and single ambulacral plate, magnified, b, (after Wright; Coral…

"The plate A is 46 inches in diameter, and is composed of gun metal. These were put on by original graduation, mainly on the plan of Edward Troughton. One very great improvement in this engine is that the axis B is tubular, as seen at C. The object of this hollow is to receive the axis of the circle to be divided, so that it can be fixed flat to the plate by the clamps E, without having first to be detached from the axis and other parts to which it has already been carefully fitted. This obviates the necessity for resetting, which can hardly be done without some error. D is the tangent screw, and F the flame carrying it, which turns on carefully polished steel pivots. The screw is pressed against the edge of the plate by a spiral spring acting under the lever G, and by screwing the lever down the screw can be altogether removed from contact with the plate." — Encyclopedia Britannica, 1893

Dividing Engine

"The plate A is 46 inches in diameter, and is composed of gun metal. These were put on by original graduation,…

"Many species hibernate. The land-snails bury themselves in the ground, or conceal themselves under the back of trees, in holes in walls, or even in the stems of large umbelliferous plants. They close the mouth of the shell with a calcareous plate, technically called an epiphragm, which they secrete by means of their mantle, and which is perforated by a small hole to admit the air." — Encyclopediia Britannica, 1893

Helix Descrtorun

"Many species hibernate. The land-snails bury themselves in the ground, or conceal themselves under…

"When a water fall ranges between 10 and 70 feet, and the water supply is from 3 to 25 cubic feet per second, it is possible to construct a bucket wheel on which the water acts chiefly by its weight. If the variation of the head-water level does not exceed 2 feet, an overshot wheel may be used. The water is then projected over the summit of the wheel, and falls in a parabolic path into the buckets. With greater variation of head-water level, a pitch-back or high breast wheel is better. The water falls over the top of a sliding sluice into the wheel, on the same side as the head race channel. By adjusting the height of the sluice, the requisite supply is given to the wheel in all positions of the head-water level. The wheel consists of a cast-iron or wrought-iron axle C supporting the weight of the wheel. To this are attached two sets of arms A of wood or iron, which support circular segmental plates termed shrouds B. A cylindrical sole plate dd extends between the shrouds on the inner side. The buckets are formed by wood planks or curved wrought-iron plates extending from shroud to shroud, the back of the buckets being formed by the sole plate." — Encyclopedia Britannica, 1893

Water Wheel

"When a water fall ranges between 10 and 70 feet, and the water supply is from 3 to 25 cubic feet per…

A man wearing a full suit of armor riding a horse.

Suit of Armor

A man wearing a full suit of armor riding a horse.

"A genus of Orthopterous insects, having an oval or orbicular flattened body, the head hidden beneath the large plate of the prothorax, long thread-like antennae, and wings folded only longitudinally. The elytra are parchment-like, and the wings are sometimes very imperfectly developed, particularly in the females, as in the case of the common cockroach." — Chambers' Encyclopedia, 1875

Male Cockroach

"A genus of Orthopterous insects, having an oval or orbicular flattened body, the head hidden beneath…

"A genus of Orthopterous insects, having an oval or orbicular flattened body, the head hidden beneath the large plate of the prothorax, long thread-like antennae, and wings folded only longitudinally. The elytra are parchment-like, and the wings are sometimes very imperfectly developed, particularly in the females, as in the case of the common cockroach." — Chambers' Encyclopedia, 1875

Female Cockroach

"A genus of Orthopterous insects, having an oval or orbicular flattened body, the head hidden beneath…

"Tangential section of a larva of Astroides calicularis which has fixed itself on a piece of cork. ec, Ectoderm; en, endoderm; mg, mesogloea; m, m, mesenteries; s, septum; b, basal plate formed of ellipsoids of carbonate of lime secreted by the basal ectoderm; ep, epitheca." — The Encyclopedia Britannica, 1910

Astroides Calicularis

"Tangential section of a larva of Astroides calicularis which has fixed itself on a piece of cork. ec,…

"Ventral view of the posterior carapace or meso-metasomatic (opisthosomatic) fusion of Limulus polyphemus. The soft integument and limbs of the mesosoma have been removed as well as all the viscera and muscles, so that the inner surface of the terga of these somites with their entopophyses are seen. The unsegmented dense chitinous sternal plate of the metasoma (XIII to XVIII) is not removed." — The Encyclopedia Britannica, 1910

Limulus Polyphemus

"Ventral view of the posterior carapace or meso-metasomatic (opisthosomatic) fusion of Limulus polyphemus.…

"Ventral view of a scorpion. Palamnaeus indus, de Geer, to show the arrangement of the coxae of the limbs, the sternal elements, genital plate and pectens. M, Mouth behind the oval median camerostome. I, The chelicerae. II, The chelae. III to VI, the four pairs of walking legs. VIIgo, The genital somite or first somite of the mesosoma with the genital operculum (a fused pair of limbs). VIIIp, the pectiniferous somite. IXstg to XIstg, the four pulmonary somites. met, the pentagonal metasternite of the prosoma behind all the coxae. x, the sternum of the pectiniferous somite. y, the broad first somite of the metasoma." — The Encyclopedia Britannica, 1910

Scorpion

"Ventral view of a scorpion. Palamnaeus indus, de Geer, to show the arrangement of the coxae of the…

"The first three pairs of mesosomatic appendages of Scorpio and Limulus compared. VII. The genital operculum; VIII. The pectens of Scorpio and the first branchial plate of Limulus; IX. The first pair of lung-books of Scorpio and the second branchial plate of Limulus. gp, Genital pore; epst, Epistigmatic sclerite; stg, Stigma or orifice of the hollow tendons of the branchial plates of Limulus." — The Encyclopedia Britannica, 1910

Mesosomatic

"The first three pairs of mesosomatic appendages of Scorpio and Limulus compared. VII. The genital operculum;…

"View of the ventral surface of the mid-line of the prosomatic region of Limulus polyphemus. The coxae of the five pairs of limbs following the chelicerae were arranged in a series on each side between the mouth, M, and the metasternites, mets. sf, The sub-frontal median sclerite. Ch, the chelicerae. cam, The camerostome or upper lip. M, the mouth. pmst, The promesosternal sclerite or chitinous plate, unpaired. mets, the right and left metasternites (corresponding to the similarly placed pentagonal sternite of Scorpio." — The Encyclopedia Britannica, 1910

Limulus Polyphemus

"View of the ventral surface of the mid-line of the prosomatic region of Limulus polyphemus. The coxae…

"Thelyphonus, one of the Pedipalpi. A, Ventral view. I, Chelicera (detached). II, Chelae. III, Palpiform limb. IV to VI, The walking legs. stc, Sterno-coxal process (gnathobase) of the chelae. st1, Anterior sternal plate of the prosoma. st2, Posterior sternal plate of the prosoma. pregen, Position of the pracgenital somite (not seen). l, l, Position of the two pulmonary sacs of the right side. 1 to 11, Somites of the opisthosoma (mesosoma plus metasoma). msg, Stigmata of the tergosternal muscles. an, Anus. B, Dorsal view of the opisthosoma of the same. pregen, The prae-genital somite. p, The tergal stigmata of the tergo-sternal muscles. paf, Post-anal segmented filament corresponding to the post-anal spine of Limulus." — The Encyclopedia Britannica, 1910

Thelyphonus

"Thelyphonus, one of the Pedipalpi. A, Ventral view. I, Chelicera (detached). II, Chelae. III, Palpiform…

"Schizomus crassicaudatus, a Tartarid Pedipalp. Dorsal view of a male with the appendages cut short. I to VI. The prosomatic appendages. a, Anterior plate. b, Posterior plate of the prosomatic carapace. prae-gen, Tergum of the praegenital somite. II, The eleventh somite of the opisthosoma. pa, Post-anal lobe of the male—a conical body with narrow basal stalk." — The Encyclopedia Britannica, 1910

Schizomus

"Schizomus crassicaudatus, a Tartarid Pedipalp. Dorsal view of a male with the appendages cut short.…

"Liphistus desultor, Ventral view with the prosomatic appendages cut short expecting the chelicerae (1) whose sharp retroverts are seen. Between the bases of the prosomatic limbs an anterior and a posterior sternal plate (black) are seen. I, The sternum of the first opisthosomatic or genital somite covering the genital aperture and the first pair of lungsacs. In front of it the narrow waist is formed by the soft sternal area of the praegenital somite. 2, the sternite of the second opisthosomatic somite covering the posterior pair of lung-sacs; 3 and 4, the spinning appendages (limbs) of the opisthosoma; a, inner, b, outer ramus of the appendage; II, sternite of the eleventh somite of the opisthosoma: in front of it other rudimentary sternites; an, anus." — The Encyclopedia Britannica, 1910

Liphistius Desultor

"Liphistus desultor, Ventral view with the prosomatic appendages cut short expecting the chelicerae…

"Liphistius desultor. Under side of the uplifted genital or first opisthosomatic somite of the female; g, genital aperture; p, pitted plate, probably a gland for the secretion of adhesive material for the eggs; l, the edges of the lamellae of the lung-books of the first pair." — The Encyclopedia Britannica, 1910

Liphistius Desultor

"Liphistius desultor. Under side of the uplifted genital or first opisthosomatic somite of the female;…

"Galeodes sp., one of the solifugae. Dorsal view. I to VI, Bases of the prosomatic appendages. o, Eyes. a, Lateral region of the cephalic plate to which the first pair of appendages are articulated. b, Cephalic plate with median eye. c, Dorsal element of somites bearing third and fourth pairs of appendages. d, Second plate of the prosoma with fifth pair of appendages. e, Third or hindermost plate of the prosoma beneath which the sixth pair of legs is articulated. 1, 2, 9, 10, First, second, ninth and tenth somites of the opisthosoma. an, Anus." — The Encyclopedia Britannica, 1910

Galeodes

"Galeodes sp., one of the solifugae. Dorsal view. I to VI, Bases of the prosomatic appendages. o, Eyes.…

"Galeodes sp., one of the Solifugae. I to VI, The six prosomatic limbs cut short. o, The eyes. b, c, Demarcated areae of the cephalic or first prosomatic plate corresponding respectively to appendages I, II, III, and to appendage IV. d, Second plate of the prosoma-carrying appendage V. e, Third plate of the prosoma-carrying appendage VI. The prae-genital somite is absent. 1, First somite of the opisthosoma. 2, Second do. S, Prosomatic tracheal aperture between legs IV and V. S' and S'', Opisthosomatic tracheal apertures. 10, Tenth opisthosomatic somite. an, Anus." — The Encyclopedia Britannica, 1910

Galeodes

"Galeodes sp., one of the Solifugae. I to VI, The six prosomatic limbs cut short. o, The eyes. b, c,…

"Garypus litoralis, one of the Pseudoscorpiones. Ventral view. I to VI, Prosomatic appendages. o, Sterno-coxal process of the basal segment of the second appendage. 1, Sternite of the genital or first opisthosomatic somite; the prae-genital somite, though represented by a tergum, has no seperate sternal plate. 2 and 3, Sternites of the second and third somites of the opishosoma, each showing a tracheal stigma. 10 and 11, Sternites of the tenth and eleventh somites of the opisthosoma. an, Anus. " — The Encyclopedia Britannica, 1910

Garypus Litoralis

"Garypus litoralis, one of the Pseudoscorpiones. Ventral view. I to VI, Prosomatic appendages. o, Sterno-coxal…

"Stylocellus sumatranus, one of the Opiliones; after Thorell. Enlarged. A, Dorsal view; I to VI, the six prosomatic appendages. B, Ventral view of the prosoma and of the first somite of the opisthosoma, with the appendages I to VI cut off at the base; a, tracheal stigma; mx, maxillary processes of the coxae of the 3rd pair of appendages; g, genital aperture. C, Ventral surface of the prosoma and opisthosoma; a, tracheal stigma; b, last somite. D, Lateral view of the 1st and 2nd pair of apendages. E, Lateral view of the whole body and two 1st appendages, showing the fusion of the dorsal elements of the prosoma into a single plate, and of those of the opisthosoma into an imperfectly segmented plate continuous with that of the prosoma." — The Encyclopedia Britannica, 1910

Stylocellus Sumatranus

"Stylocellus sumatranus, one of the Opiliones; after Thorell. Enlarged. A, Dorsal view; I to VI, the…

"Holothyrus nitidissimus, one of the Acari; ater Thorell. A, Lateral view with appendages III to VI removed, I, plate covering the whole dorsal area, representing the fused tergal sclerites of the prosoma and opisthosoma; 2, similarly-formed ventral plate; 3, tracheal stigma. B, dorsal view of the same animal; II to VI, 2nd to 6th pairs of appendages. The 1st pair of appendages both in this and in C are retracted. C, Ventral view of the same; II to VI as in B; a, genital orifice; b, anus; c, united basal segments of the second pair of appendages; d, basal segment of the 6th prosomatic appendage of the right side. The rest of the appendage, as also of app. III, IV and V, has been cut away." — The Encyclopedia Britannica, 1910

Holothyrus Nitidissimus

"Holothyrus nitidissimus, one of the Acari; ater Thorell. A, Lateral view with appendages III to VI…

"Suit by Jacob Topf, nearly complete; the gorget does not belong to it." — The Encyclopedia Britannica, 1910

Full Plate Armor

"Suit by Jacob Topf, nearly complete; the gorget does not belong to it." — The Encyclopedia Britannica,…

"Abdominal Plate (worker of Apis), under side, third segment. W, wax-yielding surface, covering true gland; s, septem, or carina; wh, webbed hairs." — The Encyclopedia Britannica, 1910

Bee Abdomen

"Abdominal Plate (worker of Apis), under side, third segment. W, wax-yielding surface, covering true…

"The "roller" chain consists of a series of outside and inside links. The outside link A is made up of two steel side plates P united by two shouldered rivets R. The inside link B consists of two side plates P united by two tubular pieces T, which form bushes for the rivets R and pivots for the rollers L. The rivets, bushes and rollers are case-hardened." — The Encyclopedia Britannica, 1910

Bicycle Chain

"The "roller" chain consists of a series of outside and inside links. The outside link A is made up…

"Brank, or Branks, an instrument and formerly used in Scotland, and to some extent also in England, as a punishment for scolds. It consisted of an iron frame which went over the head of the offender, and had in front an iron plate which was inserted in the mouth, where it was fixed above the tongue, and kept it perfectly quiet." — Winston's Encyclopedia, 1919

Brank

"Brank, or Branks, an instrument and formerly used in Scotland, and to some extent also in England,…

"Sepulchral or monumental, large plates of brass inlaid in polished slabs of stone, and usually exhibiting the figure of the person intended to be commemorated, either in a carved outline on the plate or in the form of the plate itself. In place of the figure we sometimes find an ornamented cross. The earliest example of these monumental slabs now existing in England is that on the tomb of Sir John D'Abernon at Stoke D'Abernon Surrey." — Winston's Encyclopedia, 1919

Brasses

"Sepulchral or monumental, large plates of brass inlaid in polished slabs of stone, and usually exhibiting…

"The oldest form of blast heating apparatus, applied by Neilson, consisted of a tubular rivetted boiler plate heating vessel, mounted in a brick chamber OOOO, and heated by a fire underneath fed through the door D, the waste gases from the fire passing out at the far end of the chimney. Crescent-shaped partitions p, p, p inside the heater caused the current of air from the blowing engine which entered at B to take a serpentine course as indicated by the arrows, finally passing off at S to the furnace." — The Encyclopedia Britannica, 1893

Hotblast Stove

"The oldest form of blast heating apparatus, applied by Neilson, consisted of a tubular rivetted boiler…

"The electrical machine most usually employed consists of a large circular plate of glass, mounted upon a metallic axis, and supported upon pillars fixed to a secure base, so that the plate can, by means of a handle, w, be turned with ease. Upon the supports of the glass, and fixed so as to press easily but uniformly on the plate, are four rubbers, marked r r r r in the figure; and flaps of silk, s s, oiled on one side, are attached to these, and secured to fixed supports by several silk cords. When the machine is put in motion, these flaps of silk are drawn tightly against the glass, and thus the friction is increased, and electricity excited. The points p p collect the electricity from the glass, and convey it to the conductor, c, which is supported by the glass rod g." —Wells, 1857

Electrical Machine

"The electrical machine most usually employed consists of a large circular plate of glass, mounted upon…

"A form of an electrical machine. S being the glass cylinder turning on an axis, Y the conductor, F the rubber, A A supports." —Wells, 1857

Electrical Machine

"A form of an electrical machine. S being the glass cylinder turning on an axis, Y the conductor, F…

"It is of gold plate, so thick as to require no "piping" at the back to sustain it; but in general the repoused examples have a piping of copper wire." —The Encyclopedia Britannica, 1910

Gold Plate

"It is of gold plate, so thick as to require no "piping" at the back to sustain it; but in general the…

"Diadems or head fillets of pure hammered gold cut into thin plates, attached to rings by double gold wires, and fastened together at the back with thin twisted wire." —The Encyclopedia Britannica, 1910

Diadem

"Diadems or head fillets of pure hammered gold cut into thin plates, attached to rings by double gold…

"aa is the mast, b tackle hook, c, c brass flanges for fixing parts of lantern together, e and g weather guards, h plate glass front of lantern, i shutter by which lamps are trimmed, k lamps, l silver reflector. Revolving catoptric apparatus was applied to floating lights in England, and M. Letourneau, in 1851, proposed to employ a number of sets of dioptric apparatus in one lantern." —The Encyclopedia Britannica, 1910

Floating Lights

"aa is the mast, b tackle hook, c, c brass flanges for fixing parts of lantern together, e and g weather…

"Dioptric Floating Light. Elevation." —The Encyclopedia Britannica, 1910

Dioptric Light

"Dioptric Floating Light. Elevation." —The Encyclopedia Britannica, 1910

"Dioptric Floating Light. Horizontal Section." —The Encyclopedia Britannica, 1910

Dioptric Light

"Dioptric Floating Light. Horizontal Section." —The Encyclopedia Britannica, 1910

"The air pump is an engine by which the air can be pumped out of a vessel, or withdrawn from it. The vessel so exhausted, is called a receive, and the space thus left in the vessel, after withdrawing the air, is called a vacuum. The principles on which the air pump is constructed are readily understood, and are the same in all instruments of this kind, though the form of the instrument itself is often considerably modified. Let R be a glass vessel, or receiver, closed at the top, and open at the bottom, standing on a perfectly smooth surface, which is called the plate of the air pump. Through thie plate is an aperture, which communicates with the inside of the receiver, and the barrel of the pump. The piston rod works air tight through the barrel. At the extremity of the barrel, there is a valve which opens upwards, and is closed as the piston rises." —Comstock, 1850

Air Pump

"The air pump is an engine by which the air can be pumped out of a vessel, or withdrawn from it. The…

"The piston rods are furnished with racks, or teeth, and are worked by the toothed wheel a, which is turned backwards and forwards, by the lever and handle b. The exhaustion pipe c, leads to the plate on which the receiver stants. The valves v, n, u, and m, all open upwards." —Comstock, 1850

Air Pump

"The piston rods are furnished with racks, or teeth, and are worked by the toothed wheel a, which is…

"A plate of glass about 2.5 inches square is ruled with twenty-one lines in one direction .1 inch apart, and two lines in the other direction 2 inches apart. The extreme lines of the set therefore form a perfect square of 2 inches. These lines are ruled with exceeding accuracy and care, but provision is left for ascertaining any errors that remain either as to distance or want of perfect squareness." —The Encyclopedia Britannica, 1903

Micrometer

"A plate of glass about 2.5 inches square is ruled with twenty-one lines in one direction .1 inch apart,…

"Dollond's divided object-glass heliometer of the third type. A is the end of the reflecting telescope, upon which the adapter B is fitted. B carries a wheel (not seen in the figure) formed of a ring racked at the outer edge, and fixed to the brass plate CC, so that the pinion moved by the handle D may turn it into any position. Two plates F, G, with the attached semi-lenses, move in slides fixed to the plate CC, —simultaneous motion, in contrary directions, being communicated to them by turning the handle E, which drives a concealed pinion that works in the two racks seen in the highest part of the figure." —The Encyclopedia Britannica, 1903

Heliometer

"Dollond's divided object-glass heliometer of the third type. A is the end of the reflecting telescope,…

"No part of the equatorial mounting is shown in the figure, as it resembles every respect that usual Fraunhofer mounting. An adapted h is fixed on a telescope-tube, made of wood, in Fraunhofer's usual fashion. To this adapter is attached a flat circular flange h. The slides carrying the segments of the divided object-glass are mounted on a plate, which is fitted and ground to rotate smoothly on the flange h. Rotation is communicated by a pinion, turned by the handle c, which works in teeth cut on the edge of the flange h. The counterpoise w balances the head about its axis of rotation. The slides are moved by the screws a and b the divided heads of which serve to measure the separation of the segments. These screws are turned from the eye-end by bevelled wheels and pinions, the latter connected with the handles a', b'." —The Encyclopedia Britannica, 1903

Heliometer

"No part of the equatorial mounting is shown in the figure, as it resembles every respect that usual…

A name given to the plate armor of the leg below the knee.

Bainberg

A name given to the plate armor of the leg below the knee.

The perspective shown in this plate is parallel perspective; and the subject here intended to be represented is a flat and perfectly square surface, such as the floor of a room, a chess board, or any other such object. 1) The front edge of the given square; 2) One side of it receding to the vanishing point, which also is the point of sight; 3) The other side receding to the same point; 4) A line taken from one corner of the front edge, to the point of measuremen on the opposite side, and giving the perspective width or depth of the square at the intersection of the line 3; 5) A line drawn at the above intersection, and parallel to the front edge; this will give the back of the square. The lines 1, 2, 3, and 5 may then be strongly marked, and the figure will be thus completed. 6) This line is taken from the corner of the front edge to the opposite point of the measurement, showing how exactly either this line, o that marked 4, will give the perspective width of the square. It serves also to find the centre.

Parallel Perspective

The perspective shown in this plate is parallel perspective; and the subject here intended to be represented…

The perspective in this plate is "angular perspective," and the figure it represents is a flat square surface; its dimensions are supposed to be either twenty feet or twenty inches. 1) Two lines drawn from the nearest corner of theboard, to the horizontal line, and at a distance from each other equal to the thickness of the board; this fixes the vanishing point at 1. 2) A line drawn from the above vanishing point to the point of station. 3) A line taken at right angles to 2, from the point of station, and fixing on the horizontal line the position of the vanishing point 3. 4) Two lines drawn from the nearest corner of the board to the vanishing point 3, similarly to the previously drawn lines 1. 5) One point of measurement, obtained in the usual way, by the distance of 3 from the point of station. 6) The point of measurement. 7) The line of the geometrical scale, being a line drawn across the base of the nearest corner, and marked according to scale, twenty feet or twenty inches. 8,8) Lines taken from either end of the geometrical scale towards the point of measurement, but extending no farther than where they meet the lines 1,1, and 4,4. 9,10) Small perpendicular lines drawn at the above intersections, by which the width of the board is ascertained. 11) The side of the board opposite and really parallel to that marked 4, and therefore tending to the same vanishing point. 12) The back of the board, opposite and parallel to the front marked 1, and consequently tending to the same vanishing point. The lines 1,1; 4,4; 11 and 12, being strongly marked, the figure will be completed.

Angular Perspective

The perspective in this plate is "angular perspective," and the figure it represents is a flat square…

A book-plate of Sir Nicholas Bacon

Book-plate

A book-plate of Sir Nicholas Bacon

A book-plate of Lazarus Spengler by Albrecht Durer in 1515

Book-plate

A book-plate of Lazarus Spengler by Albrecht Durer in 1515

A book-plate of P. A. Convers in 1762

Book-plate

A book-plate of P. A. Convers in 1762

A book-plate of William Hewer in 1699

Book-plate

A book-plate of William Hewer in 1699

A book-plate of Francis Gwyn of Lansanor in 1698

Book-plate

A book-plate of Francis Gwyn of Lansanor in 1698

Brooch with disk for catch-plate

Brooch

Brooch with disk for catch-plate

A turned-up and elongated catch-plate in a leech fibula form

Brooch

A turned-up and elongated catch-plate in a leech fibula form

A turned-up and elongated catch-plate in a boat fibula form

Brooch

A turned-up and elongated catch-plate in a boat fibula form

A turned-up and elongated catch-plate in a boat fibula form

Brooch

A turned-up and elongated catch-plate in a boat fibula form

A type of brooch with disk for catch-plate and convoluted bow

Brooch

A type of brooch with disk for catch-plate and convoluted bow

A type of brooch with turned-up catch-plate and convoluted bow

Brooch

A type of brooch with turned-up catch-plate and convoluted bow

Australia's 7,686,850 square kilometers landmass is on the Indo-Australian Plate. Surrounded by Indian, Southern and Pacific oceans, Australia is separated from Asia by the Arafura and Timor seas. Australia has a total 25,760 kilometers of coastline.

Australian Scenery

Australia's 7,686,850 square kilometers landmass is on the Indo-Australian Plate. Surrounded by Indian,…

Plate-like covering of white grubs.

Spiracles

Plate-like covering of white grubs.

The San Jose scale, outline of anal plate of female.

San Jose Scale

The San Jose scale, outline of anal plate of female.

Ethmoid bone, posterior surface. The ethmoid bone is an exceedingly light, spongy bone, placed between the two orbits and at the root of the nose, contributing to form a part of each of these cavities. Label: 2, cribriform, or perforated plate.

Ethmoid Bone of the Human Skull

Ethmoid bone, posterior surface. The ethmoid bone is an exceedingly light, spongy bone, placed between…

Nerve ending in muscular fiber of a lizard (Kühne). The end-plate, or motorial ending of the axone, is seen sideways.

Nerve Ending in Muscle Fiber of Lizard

Nerve ending in muscular fiber of a lizard (Kühne). The end-plate, or motorial ending of the axone,…

"The metallic elements C and Z each conssted of two metals, the plate C being of copper and the plate of Z zinc. They were placed, as shown, in the glass vessels, which contained salt water and ordinary water of lye. Into each vessel, except the two end ones, the copper end of one arc and the zinc end of the next were introduced, the series, however long, ending with copper dipping into the terminal wbessel at one end and zinc into that at the other. The arrangement is almost exactly that of a modern one fluid battery." -Hawkins, 1917

Volta's Crown of Cups

"The metallic elements C and Z each conssted of two metals, the plate C being of copper and the plate…