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"An object in parallel perspective with one face in the picture plane is shown. At B is shown the top view of A with the cone of rays. C shows the picture plane detached and set forward in order that it may not interfere with the plan when revolved. D is the top view of C after the picture plane has been revolved." —French, 1911

Parallel Perspective

"An object in parallel perspective with one face in the picture plane is shown. At B is shown the top…

"For sprockets of different diameters, small rings D are used, of different diameters. The nut C is screwed on and off by a wrench; it has grooves, in order to get rid of the turnings that fall on the threads of the studs." —Grimshaw, 1902

Bicycle Sprockets Gear

"For sprockets of different diameters, small rings D are used, of different diameters. The nut C is…

"In order to get the best results from the tool the pressure on the handle should always be in the direction of the arrow shown above the latter, so as to put the pressure on the jaws at the points B and C, and not at D and E." —Grimshaw, 1902

Adjustable Wrench

"In order to get the best results from the tool the pressure on the handle should always be in the direction…

A Memograph is a clock that is designed to make a loud sound at a specific time. The primary use of these clocks is to awaken people from their sleep in order to start their days in the mornings, but can also be used for short naps; they are sometimes used for other reminders as well.

Memograph Clock

A Memograph is a clock that is designed to make a loud sound at a specific time. The primary use of…

Most boilers consist of a rotating drum called a tumbler through which heated air is circulated to evaporate the moisture from the load. The tumbler is rotated relatively fast in order to maintain space between the articles in the load.

Clothes Boiler

Most boilers consist of a rotating drum called a tumbler through which heated air is circulated to evaporate…

This is a military insignia for "the junior order of moose."

Military Badge

This is a military insignia for "the junior order of moose."

This ice chest is used in the storage of ice in order to maintain a cool temperature for drinks and other liquids

Ice Chest for Liquid Dispensing Apparatus

This ice chest is used in the storage of ice in order to maintain a cool temperature for drinks and…

"Moonwort, or moon—fern, in botany belonging to the order Ophioglossaceae. It has a tuberous root—stock and a stout fleshy glabrous fround 3 to 6 in. long, with a sterile and fertile portion." —Encyclopaedia Britannica

Botrychium Lunaria Moonwort Fern with Root

"Moonwort, or moon—fern, in botany belonging to the order Ophioglossaceae. It has a tuberous root—stock…

"In this machine a petrol or paraffin engine drives a water—ballast roller through the medium of a clutch, a simple form of change—speed gear—box, and a single roller chain. The leading roller, by which steering is effected, is also filled with water, in order to obtain the dead weight necessary for rolling." —Encyclopaedia Britannica, 1910

Thornycroft Military Oil Tractor

"In this machine a petrol or paraffin engine drives a water—ballast roller through the medium…

"Polygonaceae, a natural order of Dicotyledons, containing 30 genera with about 700 species, chiefly in the north temperate zone, and represented in Great Britain by three genera. They are mostly herbs characterized by the union of the stipules into a sheath or ocrea, which protects the younger leaves in the bud stage." —Encyclopaedia Britannica Company, 1910

Stem and Leaf Part of Polygonum

"Polygonaceae, a natural order of Dicotyledons, containing 30 genera with about 700 species, chiefly…

"Polygonaceae is mainly a north temperate order. A few genera are tropical which has 125 species restricted to tropical and sub—tropical America. Polygonum has a very wide distribution to the mountains of tropical Africa and South Africa, through the highlands of tropical Asia to Australia, and in America as far south as Chile. Most of the genera have a limited distribution. Of the three which are native in the British Isles." —Encyclopaedia Britannica Company, 1910

Flowers and Leaves of Common Dock

"Polygonaceae is mainly a north temperate order. A few genera are tropical which has 125 species restricted…

A machine using an electric motor to rotate thin, rigid vanes in order to move air, as for cooling.

Fan Propeller

A machine using an electric motor to rotate thin, rigid vanes in order to move air, as for cooling.

A machine that inserts staples into sheets of paper in order to fasten them together

Stapling Machine

A machine that inserts staples into sheets of paper in order to fasten them together

Built by Seti I and completed by his son Ramses II. The pillars in this temple contain carvings of very fine quality.

The Temple of Abydos

Built by Seti I and completed by his son Ramses II. The pillars in this temple contain carvings of very…

"In order that [Alaric's] body might be saved from the gaze of the vulgar and the rage of his foes, he gave direction that it should be buried in the bed of the river Busentinus."—Ridpath, 1885

The Burial of Alaric in the Bed of the Busentinus

"In order that [Alaric's] body might be saved from the gaze of the vulgar and the rage of his foes,…

"1. Companies of the Regulars marching into Concord. 2. Companies of the Regulars drawn up in order. 3. A Detachment destroying the Provincial Stores. 4, 5. Colonel Smith and Major Pitcairn viewing the Provincials, who were mustering on an East Hill in Concord. 6. The Court and Town-house. 7. The Meeting-house."—Coffin, 1879.

British Troops on Concord Common

"1. Companies of the Regulars marching into Concord. 2. Companies of the Regulars drawn up in order.…

"We see here a number of cooks busily engaged in making some broth which they wish to have better than common. For once, they unite their skill. One thinks that everything out to be well salted in order to be palatable, another puts in a good deal of pepper, while another prefers to have a variety of savory herbs. Each of these cooks are careful to put in enough of their favorite ingredients, and thus the broth is cooked. When put on the table it is found to be too salt for some of the company, too high seasoned for others, etc. In short, the broth is spoiled for their eating."—Barber, 1857

Too Many Cooks Spoil the Broth

"We see here a number of cooks busily engaged in making some broth which they wish to have better than…

"These two boys have just been let out of school, and are returning home. Their father's house is seen in the distance on the right, and between it and the school-house there is a large tract of marshy and miry ground. The elder brother shows his wisdom in going round in the old beaten path. But the younger brother, in his eagerness to get home first, takes a shorter cut across the marsh. He takes a pole with him in order to leap across the ditches he may find in his way. In leaping across one of them the pole breaks, he falls into the ditch, and is mired nearly up to his neck in mud. It is unnecessary to state which boy got home first, or who made the best appearance after they got home."—Barber, 1857

The Longest Way Round, is the Shortest Way Home

"These two boys have just been let out of school, and are returning home. Their father's house is seen…

Roger Williams was the founder of the Providence Plantation in Rhode Island, as well as the first Baptist church in America. He crossed the Pawtucket River in order to obtain more land from the Native Americans.

Roger Williams Crossing the Pawtucket River

Roger Williams was the founder of the Providence Plantation in Rhode Island, as well as the first Baptist…

"Instituted by Napoleon in 1802; given to both soldiers and civilians for distinguished services to the state. In the present order of the French Republic the symbolical head of the republic appears in the center, and a laurel wreath replaces the imperial crown."—Webster, 1920

Cross of the Legion of Honor

"Instituted by Napoleon in 1802; given to both soldiers and civilians for distinguished services to…

The mace is carried in order to represent an official's authority.

House of Commons Mace

The mace is carried in order to represent an official's authority.

African slaves jumping the slave ship in order to obtain freedom.

A Dash for Liberty

African slaves jumping the slave ship in order to obtain freedom.

"At the age of twenty-one the squire became a knight, being then introduced to the order of knighthood by a peculiar and impressive service."—Myers, 1905

Arming a Knight

"At the age of twenty-one the squire became a knight, being then introduced to the order of knighthood…

"From a gravestone of the first century A.D. The standard consists of a spear crowned with a wreath, below which is a crossbar bearing pendant acorns. Then follow, in order, a metal disk. Jupiter's eagle standing on a thunderbolt, a crescent moon, an amulet, and a large tassel."—Webster, 1913

A Roman Standard Bearer

"From a gravestone of the first century A.D. The standard consists of a spear crowned with a wreath,…

"The Star is the badge, first ordered by Charles I. The rays are of silver or diamonds. The star is worn on the left breast."—Aveling, 1891

Star of the Order of the Garter

"The Star is the badge, first ordered by Charles I. The rays are of silver or diamonds. The star is…

"The Jewel or Badge, attached to the collar, or worn depending from a broad dark green ribbon which crosses the left shoulder, is formed of a figure of St. Andrew, of gold enamelled, his surcoat purpure, and his mantle vert, bearing before him his own cross saltire, the whole being irradiated with golden rays, and surrounded by an oval bearing the motto, 'nemo me impune lacessit.''"—Aveling, 1891

Insignia of the Order of the Thistle

"The Jewel or Badge, attached to the collar, or worn depending from a broad dark green ribbon which…

"The ribbon, of sky-blue, four inches in width, is worn over the right shoulder, and sustains the badge when the collar is not worn."—Aveling, 1891

Insignia of the Order of St. Patrick

"The ribbon, of sky-blue, four inches in width, is worn over the right shoulder, and sustains the badge…

"The collar, of gold, in weight thirty ounces, is composed of nine imperial crowns, and eight groups of rose, thistle, and shamrock, issuing from a sceptre, and enamelled proper, all linked together with seventeen knots enamelled ar., and having The Badge as a pendant."—Aveling, 1891

Insignia of the Order of the Bath

"The collar, of gold, in weight thirty ounces, is composed of nine imperial crowns, and eight groups…

"This Order was instituted by Her Majesty the Queen, in the year 1861, for bestowing honor upon the people of her Indian Empire. The Order consists of the Sovereign, a Grand Master, always to be Governor-General of India, and twenty-five Knights, with such Honorary Knights as the Crown may appoint. The Knights are to include both Naval, Military, and Civil officers, and natives of India."—Aveling, 1891

Insignia of the Order of the Star of India

"This Order was instituted by Her Majesty the Queen, in the year 1861, for bestowing honor upon the…

"The Savoy cabbages have wrinkled leaves and have a peculiar flavor that is much liked by most people. They are improved in quality by a slight touch of frost."—Rawson, 1892

Globe Curled Savoy

"The Savoy cabbages have wrinkled leaves and have a peculiar flavor that is much liked by most people.…

"The Improved Long Orange is the standard stock carrot. The roots are large and long, and are of good quality for feeding."—Rawson, 1892

Improved Long Orange Carrot

"The Improved Long Orange is the standard stock carrot. The roots are large and long, and are of good…

A squash with a hard shell and better quality than other species of squash.

Essex Hybrid

A squash with a hard shell and better quality than other species of squash.

"In the second order of levers, the resistance is between the fulcrum and the power; and, as before, P : W :: BF : AF, but the pressure of the fulcrum is equal to W-P, or the weight less the power."—Pettigrew, 1874

Second Kind of Lever

"In the second order of levers, the resistance is between the fulcrum and the power; and, as before,…

"In the third order of lever the power acts between the prop and the resistance, where also P : W :: BF : AF, and the pressure on the fulcrum is P-W, or the power less the weight."——Pettigrew, 1874

Third Kind of Lever

"In the third order of lever the power acts between the prop and the resistance, where also P : W ::…

The skeleton of a dugong, one of four living species in the order Sirenia.

Skeleton of the Dugong

The skeleton of a dugong, one of four living species in the order Sirenia.

A diagram showing the motions a young frog makes while swimming. In this stage of life, the frog makes ellipses in order to move through the water.

Ellipses of Swimming Frog

A diagram showing the motions a young frog makes while swimming. In this stage of life, the frog makes…

In order to grow achimenes they have to be started and grown in stove heat until they flower. Roots should be started in February until the end of April. When the shoots are about two inches high then the root can be transplanted to the pots where they will be grown.

Root of the Achimene

In order to grow achimenes they have to be started and grown in stove heat until they flower. Roots…

Frog hopper belong to the same order as aphidoe, to the section which has the leathery upper wings. It is the larva of the frog hoppers the produce a frothy secretion referred to as frog spit or cuckoo spit. This secretion is harmful to plants.

Larva, Frothy Secretion, and Perfect Insect of the Frog Hopper

Frog hopper belong to the same order as aphidoe, to the section which has the leathery upper wings.…

House crickets are in the order Orthoptera. Crickets are destructive to plants in every stage after leaving the egg.

House Cricket

House crickets are in the order Orthoptera. Crickets are destructive to plants in every stage after…

Grasshoppers belong to the order Orthoptera. Grasshoppers have mouths fit for biting, net-veined wings, and thick front wings.

Green Grasshopper

Grasshoppers belong to the order Orthoptera. Grasshoppers have mouths fit for biting, net-veined wings,…

Cockroaches belong to the order Orthoptera. Cockroaches are harmful to plants in every stage after leaving the egg.

Female Cockroach

Cockroaches belong to the order Orthoptera. Cockroaches are harmful to plants in every stage after leaving…

Frog hoppers belong to the order Heteroptera. This order is also known as plant bugs. These insects are very small.

Larva, Frothy Section, and Perfect Insect of the Frog Hopper

Frog hoppers belong to the order Heteroptera. This order is also known as plant bugs. These insects…

Size and good quality in the flowers of the Lily of the Valley depend upon the cultivation and attention given to the preparation of the crowns.

Flowering Stem of the Lily of the Valley

Size and good quality in the flowers of the Lily of the Valley depend upon the cultivation and attention…

Fan training of pears is better adapted for walls that are much higher than those usually surrounding gardens. Once established, fan trained trees bear fruit of good quality.

Fan Training of Pear Trees

Fan training of pears is better adapted for walls that are much higher than those usually surrounding…

The order marattiaceae, and the maratiia family, consists of stately tropical ferns with thickened, often erect, stems. The leaves are usually very large. The ophioglossaceae order has plants of small or medium size, often somewhat fleshy.

Marattiaceae and Ophioglossaceae

The order marattiaceae, and the maratiia family, consists of stately tropical ferns with thickened,…

The hymenophyllaceae order consists of very delicate ferns. The cyatheaceae order usually consists of tree ferns with large leaves. The polypodiaceae order consists of ferns of very diverse habit.

Hymenophyllaceae, Cyatheaceae, and Polypodiaceae

The hymenophyllaceae order consists of very delicate ferns. The cyatheaceae order usually consists of…

Schizaeaceae: 1, aneimia, sporangium. Osmundaceae: 2, Osmunda, sporangium; a, front view, b, back view. Salviniaceae: 3, salvinia, a, whole plant; b, section of sporocarps showing sporangia. Marsileaceae: 4, marsilea, a, whole plant; b, sporocarp germinating; c, sporocarp emitting gelatinous thread with sori; 5, pilularia, a, cross section of sporocarp; b, sporocarp emitting sporangia.

Schizaeaceae, Osmundaceae, Salviniaceae, and Marrsileaceae

Schizaeaceae: 1, aneimia, sporangium. Osmundaceae: 2, Osmunda, sporangium; a, front view, b, back view.…

Cycadaceae is an order with more or less woody plants. The stems are thick, unbranched, columnar, or tuberous. Ginkogoaceae is an order of much branched trees with deciduous leaves.

Cycadaceae and Ginkogoaceae

Cycadaceae is an order with more or less woody plants. The stems are thick, unbranched, columnar, or…

Taxaceae order consists of the yew family. The Pinaceae order consists of the pine family. The Gnetaceae order consists of gnetum family, which has semi-woody plants of diverse habit.

Taxaceae, Pinaceae, and Gnetaceae

Taxaceae order consists of the yew family. The Pinaceae order consists of the pine family. The Gnetaceae…

The typhaceae order consists of perennial marsh herbs with creeping rootstocks. The pandanaceae order consists of shrubby plants with simple or branched stems and prop roots. The naiadaceae order consists of immersed aquatic herbs.

Typhaceae, Pandanaceae, and Naiadaceae Orders

The typhaceae order consists of perennial marsh herbs with creeping rootstocks. The pandanaceae order…

Alismaceae is an order of herbaceous marsh plants with milky juice. Butomaceae is an order of aquatic or marsh herbs. Hydrocharitaceae is an order of submerged aquatic herbs. Pictured are various parts of flowers of those orders.

Alismaceae, Butomaceae, and Hydrocharitaceae Orders

Alismaceae is an order of herbaceous marsh plants with milky juice. Butomaceae is an order of aquatic…

Gramineae order consists of the grass family. Pictured are (1a) a part of a grass panicle, (1b) spikelet, (2) avena, (2a) portion of panicle, (2b), spikelet, (e.g.) empty glume, (fl.g.) flowering glume or lemma, (pal) palet or palea, (2c), ground plan of spikelet, (3) phleum, spikelet, and (4), phalaris, sheath and ligule.

Gramineae Order

Gramineae order consists of the grass family. Pictured are (1a) a part of a grass panicle, (1b) spikelet,…

Pictured from the cyperaceae orders are (1) scirpus, (1a) a portion of inflorescence, (1b) flower, (2) eriophorum, spikelet, (3) carex, (3a) inflorescence, and (3b) vertical section of perigynium. Pictured from the palmaceae order are (4) chamaerops, (4a) spathe and spadix, and (4b) floral diagram. Pictured from the cyclanthaceae order are (5) cyclanthus, inflorescence, and (6) carludovica, inflorescence.

Cyperaceae, Palmaceae, and Cyclanthaceae Orders

Pictured from the cyperaceae orders are (1) scirpus, (1a) a portion of inflorescence, (1b) flower, (2)…

Pictured from the araceae order are (1) arisaema, spathe and spadix, and (2) arum spadix with male and female flowers. Pictured from the lemnaceae order are (3) lemna, (3a) whole plants, and (3b) male and female flowers, and spathe. Pictured from the bromeliaceae order is (4) bromelia flower, (5) ananas, (5a) fruiting inflorescence, and (5b) floral diagram. Pictured from the commelinaceae order is (6) commelina flower and (7) tradescantia flower.

Araceae, Lemnaceae, Bromeliaceae, and Commelinaceae Orders

Pictured from the araceae order are (1) arisaema, spathe and spadix, and (2) arum spadix with male and…

Shown are flowers of the pontederiaceae, juncaceae, liliaceae, and amaryllidaceae orders. These flowers include (1) pontederia, (2) luzula, (3) juncus, (4) dracaena, (5) fritillaria, (6) leucoium, and (7) narcissus.

Pontederiaceae, Juncaceae, Liliaceae, and Amaryllidaceae Orders

Shown are flowers of the pontederiaceae, juncaceae, liliaceae, and amaryllidaceae orders. These flowers…

Shown are the orders of Casuarinaceae, Saururaceaem, Oiperaceae, and Chloranthaceae. Pictured are various flowers and fruits of these order including casuarina, saururus, piper, and chlorantus.

Casuarinaceae, Saururaceaem, Oiperaceae, and Chloranthaceae Orders

Shown are the orders of Casuarinaceae, Saururaceaem, Oiperaceae, and Chloranthaceae. Pictured are various…

Shown are the Urticaceae, Loranthaceae, and Olacaceae orders. Urtica, banksia, protea, phoradendron, and liriosma are flowers of these orders that are illustrated here.

Urticaceae, Loranthaceae, and Olacaceae Orders

Shown are the Urticaceae, Loranthaceae, and Olacaceae orders. Urtica, banksia, protea, phoradendron,…

Pictured are the orders of Nyctanginaceae, Phytolaccaceae, Aizoaceae, and Portulacaceae. Flowers of those orders include: (1) mirabilis, (2) neea, (3) phytolacca, (4) molluga, (5) aizoon, (6) mesembryanthemum, and (7) calandrinia.

Nyctanginaceae, Phytolaccaceae, Aizoaceae, and Portulacaceae

Pictured are the orders of Nyctanginaceae, Phytolaccaceae, Aizoaceae, and Portulacaceae. Flowers of…

Pictured are the orders of Bassellaceae and Caryophyllaceae. The flower pictured belong to the Bassellaceae order is (1) boussingaultia. The flowers pictured that belong to the order of Caryophyllaceae are (2) silene, (3) agrostemma, (4) arenaria, (5) sagina, (6) spergula, and (7) paronychia.

Bassellaceae and Caryophyllaceae Order

Pictured are the orders of Bassellaceae and Caryophyllaceae. The flower pictured belong to the Bassellaceae…

Nymphaeaceae is an order of aquatic herbs including the water lily family. This order has eight genera and about sixty species. Pictured are various flowers belonging to the order.

Order of Nymphaeaceae

Nymphaeaceae is an order of aquatic herbs including the water lily family. This order has eight genera…