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Twenty Shillings Bill (20 shillings) Delaware currency from 1746. Type with engraved border and royal arms printed by Benjamin Franklin.

Paper Money, Twenty Shillings Bill, 1746

Twenty Shillings Bill (20 shillings) Delaware currency from 1746. Type with engraved border and royal…

Leaves - simple; alternate; edge sharp-toothed. Outline - long oval to reverse egg-shape. Apex - taper-pointed. Base - pointed or rounded. Leaf/Stem - one fourth to one half inch long, smooth, reddish, usually with two small wart-like glands on the raised border near the base of the leaf. Leaf - two to three inches long; smooth when mature; "net-veined," with distinct furrows over the ribs; somewhat downy on the ribs and in their angles. Bark - of trunk very dark reddish-green or bronze-green, resembling that of a cherry-tree. Fruit - one half to two thirds inch in diameter; broad oval; yellow, orange, or red; with a thick and acid skin and a pleasant flavor. August. Stone - slightly flattened, and with both edges winged and sharp. Found - from Canada southward to Florida and westward, and often in cultivation. General Information - A small tree (sometimes a bush), eight to twenty feet high, with hard, reddish wood. In cultivation it forms an excellent stock on which to graft the domestic plums.

Genus Prunus L. (Cherry, Plum)

Leaves - simple; alternate; edge sharp-toothed. Outline - long oval to reverse egg-shape. Apex - taper-pointed.…

Leaves - simple; alternate; edge quite deeply wavy-toothed. Outline - reverse egg-shape or oval. Apex - blunt-pointed. Base - pointed. Leaf - five to eight inches long; smooth, and rather bright green above; whitish-downy beneath, becoming almost silvery-white; often with a rather deep hollow just below the middle, and usually abruptly spreading above; the teeth unequal, longest toward the middle of the leaf, sometimes almost long enough to be called lobes; mostly rounded at the apex, but sometimes ending in a hard point; the main ribs prominent and rust-colored. Bark - of trunk, grayish-white, dividing into large, flat scales. Acorns - usually in pairs on a stem one and a quarter to three inches long. Cup - rounded, rather thin, rough, with sharp scales; the upper scales bristle-tipped, forming a border, or sometimes a fringe, along the edge; slightly downy within. Nut - one inch or less in length, egg-shape; sweet. October. Found - from Southern Maine and the Upper St. Lawrence to Southeastern Iowa and Western Missouri, south to Delaware and along the Alleghany Mountains to Northern Georgia; along borders of streams and in swamps, in deep, rich soil. Its finest growth is in the region of the Great Lakes. General Information - A tree thirty to sixty feet high or more, with wood similar in value to that of the White Oak. Quercus, possible from a Celtic word meaning to inquire, because it was among the oaks that the Druids oftenest practised their rites.

Genus Quercus, L. (Oak)

Leaves - simple; alternate; edge quite deeply wavy-toothed. Outline - reverse egg-shape or oval. Apex…

Leaves - simple; opposite; edge closely and sharply toothed. Outline - egg-shape. Apex - pointed. Base - round. Quite variable. Leaf/Stem - winged on both sides with a wavy border; when young, sprinkled with brownish glands. Leaf - about three to four inches long, and half as wide or more; smooth. Flowers - white, in flat, stemless clusters. May, June. Fruit - one half inch long; oval; sweetish; red, becoming almost black when ripe; edible. Found - from Hudson's Bay through the Northern States, southward to Georgia. Common in swamps and rich, moist soil. General Information - A tree fifteen to twenty feet high, with hard, ill-smelling wood.

Genus Viburnum, L. (Haw and Viburnum)

Leaves - simple; opposite; edge closely and sharply toothed. Outline - egg-shape. Apex - pointed. Base…

Leaves - simple; opposite; edge lobed, with the lobes irregularly sharp-toothed and notched. Outline - roundish, with three to five lobes (the lowest pair, if present, the smallest); and with the hollows between the lobes pointed and usually extending less than half-way to the base of the leaf. Apex - of the lobes, pointed. Base - heart-shaped (or sometimes rounded.) Leaf/Stem - long and round. Leaf - (very variable in size and in the toothing and shape of its lobes); whitish beneath. Bark - smoothish; gray, becoming dark and rough with age. Flowers - rich crimson, on short stems in drooping clusters. March, April. Fruit - bright red, smooth, with stems two to three inches long. The wings are about one inch long. At first they approach each other, but afterward are somewhat spreading. September. Found - widely distributed in swamps and along streams especially in all wet forests eastward from the Mississippi to the Atlantic, and from Southern Canada to Florida and Texas. General Information - A tree thirty to sixty feet high, with wood of considerable value, especially when it shows a "curly grain." It is one of the very earliest trees to blossom in the spring, and to show its autumn coloring in the fall.

Genus Acer, L. (Maple)

Leaves - simple; opposite; edge lobed, with the lobes irregularly sharp-toothed and notched. Outline…

Section through the right kidney from its outer to its inner border. Labels: 1, cortex; 2, medulla; 2' , pyramid of Malpighi; 2", pyramid of Ferrein; 5, small branches of the renal artery entering between the pyramids; A, a branch of the renal artery; D, the pelvis of the kidney; U, ureter; C, a calyx.

Section of the Right Kidney

Section through the right kidney from its outer to its inner border. Labels: 1, cortex; 2, medulla;…

A drawing board is usually made of well-seasoned and straight-grained soft pine, the grain running lengthwise of the board.

Drawing Board

A drawing board is usually made of well-seasoned and straight-grained soft pine, the grain running lengthwise…

Celtic border with knots

Celtic Border

Celtic border with knots

Reverse side of American one cent piece with wheat stalks (produced from 1909-1958).

Wheat Cent

Reverse side of American one cent piece with wheat stalks (produced from 1909-1958).

Characters from "The Little Red Hen." The dog, cat, and rat do not want to help the hen make bread.

Animals

Characters from "The Little Red Hen." The dog, cat, and rat do not want to help the hen make bread.

"The Little Red Hen" cutting wheat to make bread.

Hen

"The Little Red Hen" cutting wheat to make bread.

A sack of wheat.

Sack

A sack of wheat.

The Little Red Hen carries her sack of wheat with a wheelbarrow.

Hen

The Little Red Hen carries her sack of wheat with a wheelbarrow.

The grain elevator of Port Arthur in Canada.

Port Arthur

The grain elevator of Port Arthur in Canada.

"Donkey carrying a load of grain sheaves in the Pyramid Age." -Breasted, 1914.

Donkeys

"Donkey carrying a load of grain sheaves in the Pyramid Age." -Breasted, 1914.

Scapula. Labels: a, superior angle; d, the glenoid cavity, or socket for the round head of the arm bone; m, the aeromion process; n, the caracoid process, which serve to protect the joint; f, the base; g, the costa, or inferior border, and h, the superior border of the triangle; l, the spine; o, the semilunar notch, for the passage of an artery, vein, and nerve.

Scapula

Scapula. Labels: a, superior angle; d, the glenoid cavity, or socket for the round head of the arm bone;…

Decorative frame or border with graduates and educational items.

Graduate Border

Decorative frame or border with graduates and educational items.

Border of four boys eating pie.

Boy Frame

Border of four boys eating pie.

Border of a cartoon man and woman at the dinner table.

Cartoon Couple Frame

Border of a cartoon man and woman at the dinner table.

A decorative border with the King of France and al of his men.

King and Men

A decorative border with the King of France and al of his men.

A decorative border with a sleeping farmer while the cow stands on the pump and the sheep play cribbage.

Farm Border

A decorative border with a sleeping farmer while the cow stands on the pump and the sheep play cribbage.

A decorative border with a chicken on a farm.

Chicken Border

A decorative border with a chicken on a farm.

A decorative border with a frog in a swamp.

Frog Border

A decorative border with a frog in a swamp.

A decorative border with a donkey being pulled, and then in the barn eating hay.

Donkey Border

A decorative border with a donkey being pulled, and then in the barn eating hay.

A decorative border of vines and apples.

Apple Border

A decorative border of vines and apples.

The Korean foxtail variety of millet, a grain.

Korean Foxtail Millet

The Korean foxtail variety of millet, a grain.

"Fruit of upright chess (Bromus racemosus): a, a', spikelet; b, b', single fruit, inner face, showing pedicel, palet, and concave face of glume with awn; c, outer face of glume; d, d', caryopsis or grain; e, pedicel." -Department of Agriculture, 1899

Grass Seed

"Fruit of upright chess (Bromus racemosus): a, a', spikelet; b, b', single fruit, inner face, showing…

"Stages in the development of the elements of the xylem. A, progressive steps in the development of a tracheal tube. 1, row of procambial or cambial cells that are to take part in the formation of a tube; 2, the same at a later stage enlarged in all dimensions; 3, the cells in 2 have grown larger, their cross-walls have been dissolved out, and the wall has become thickened and pitted; 4, the walls in 3 have become more thickened, the pits have an overhanging border, the walls have become lignified as indicated by the stippling, and finally the protoplasts have disappeared, and the tube is mature and dead." -Stevens, 1916

Xylem Development 1

"Stages in the development of the elements of the xylem. A, progressive steps in the development of…

"Different stages in the development of a bordered pit. b, The original, thin, primary wall; a, the overhanging border formed as the wall thickened. B, Thickening of the wall has continued and extended the border; the primary wall has thickened at c, forming the torus. C, the border and the torus are finished." -Stevens, 1916

Pit Development

"Different stages in the development of a bordered pit. b, The original, thin, primary wall; a, the…

"Semi-diagrammatic cross section of a leaf showing by arrows how the water passes from the tracheal elements of a vein into the border parenchyma cells, and thence into the palisade and spongy parenchyma, from which it evaporates into the intercellular spaces and passes from the leaf through the stomata. a, upper epidermis; b, lower epidermis; c, palisade parenchyma; g, spongy parenchyma; d, border parenchyma; e, tracheal elements; and the stippled cells bellow e, the phloem cells." -Stevens, 1916

Leaf Water Flow

"Semi-diagrammatic cross section of a leaf showing by arrows how the water passes from the tracheal…

"Showing intercellular spaces: f, between the palisade cells; e, in a leaf; g, border parenchyma; h, tracheal elements of the vein." -Stevens, 1916

Intercellular Spaces of Leaf

"Showing intercellular spaces: f, between the palisade cells; e, in a leaf; g, border parenchyma; h,…

"Cross section of a portion of a leaf of Indian corn. a, upper and b, lower epidermis; c, c, palisade cells; n, border parenchyma containing starch within its chloroplasts; e, vascular bundle; d, d, stomata." -Stevens, 1916

Indian Corn Leaf Cells

"Cross section of a portion of a leaf of Indian corn. a, upper and b, lower epidermis; c, c, palisade…

"Diagram indicating the succession of the conducting tissues of a vein from the base toward the apex. a, border parenchyma; b, companion cells; c, sieve tubes; d, undivided mother cells of companion cells and sieve tubes; e, tracheal elements." -Stevens, 1916

Plant Vein

"Diagram indicating the succession of the conducting tissues of a vein from the base toward the apex.…

"Showing concentric and eccentric striations of starch grains. e, potato starch eccentrically striated; f, compound starch grain from potato; g, bean starch concentrically striated." -Stevens, 1916

Starch Grain Striations

"Showing concentric and eccentric striations of starch grains. e, potato starch eccentrically striated;…

The head, foot, and tail of a Stone Chat Wheat-Ear

Stone Chat Wheatear

The head, foot, and tail of a Stone Chat Wheat-Ear

"The Hessian Fly (Cecidiomya destructor). a, the adult; b, larva; c, pupa; d, larvae in position on stalk of wheat." -Galloway, 1915

Hessian Fly Stages

"The Hessian Fly (Cecidiomya destructor). a, the adult; b, larva; c, pupa; d, larvae in position on…

A decorative border of children and nature.

Children Border

A decorative border of children and nature.

A decorative frame of flowers and vines.

Floral Frame

A decorative frame of flowers and vines.

A decorative border for spring with vines, a nest, and dragonflies.

Spring Border

A decorative border for spring with vines, a nest, and dragonflies.

A decorative border of envelopes, letters, and inkwells with four windows and banners for captions.

Letter and Ink Border

A decorative border of envelopes, letters, and inkwells with four windows and banners for captions.

A decorative divider with wheat in the center, surrounded by dogs, rabbits, and other plants.

Animal Divider

A decorative divider with wheat in the center, surrounded by dogs, rabbits, and other plants.

Of the Figwort family (Scrophulariaceae), cow-wheat (Melampyrum lineare).

Cow-Wheat

Of the Figwort family (Scrophulariaceae), cow-wheat (Melampyrum lineare).

"Lengthwise section of grain of corn. y, yellow, oily part of endosperm; w, white, starchy part of endosperm; p, plumule; s, the shield (cotyledon), in contact with the endosperm for absorption of food from it; r, the primary root." -Bergen, 1896

Corn Grain

"Lengthwise section of grain of corn. y, yellow, oily part of endosperm; w, white, starchy part of endosperm;…

"Section through exterior part of a grain of wheat. c, cuticle or outer layer of bran; ep, epidermis; m, layer beneath epidermis; qu, sch, layers of hull next to seed-coats; br, n, seed-coats; Kl, layer containing proteid grains; st, cells of the endosperm filled with starch." -Bergen, 1896

Wheat Grain

"Section through exterior part of a grain of wheat. c, cuticle or outer layer of bran; ep, epidermis;…

"Pollen grains. a, pumpkin; b, enchanter's nightshade; c, Albuca; d, pink; e, hibiscus." -Bergen, 1896

Pollen Grains

"Pollen grains. a, pumpkin; b, enchanter's nightshade; c, Albuca; d, pink; e, hibiscus." -Bergen, 1896

"The plant tillers like wheat, but not to the same degree. The cane ground is kept clean by hand-hoeing, or by the plough." -Lupton

Gathering, Sugar Cane

"The plant tillers like wheat, but not to the same degree. The cane ground is kept clean by hand-hoeing,…

"To find the number of bushels of grain in a bin or box, multiply the length in feet by the height in feet, then by the width in feet and then by 8. For instance. In a bin 10 feet long, 6 feet high and 8 feet wide, 10 x 8 x 6 x 8 = 384." -Foster, 1921

Capacity

"To find the number of bushels of grain in a bin or box, multiply the length in feet by the height in…

A machine for cutting down standing grain, usually worked by a pair of horses, the cutting machinery being driven by being connected with the wheels on which the machine is drawn over the field.

Reaping Machine

A machine for cutting down standing grain, usually worked by a pair of horses, the cutting machinery…

A species of grain of which there are several varieties It is an esculent grain bearing naked seeds on a flat ear, furnished with awns like barley.

Rye Grain

A species of grain of which there are several varieties It is an esculent grain bearing naked seeds…

The coat of arms of Alberta, a province of Canada.

Alberta Coat of Arms

The coat of arms of Alberta, a province of Canada.

A section of the eye seen from within. Labels: 1, The divided edge of the three coats. 2, The pupil. 3, The iris. 4, The ciliary processes. 5, The scolloped border of the retina.

A Section of the Eye Seen from Within

A section of the eye seen from within. Labels: 1, The divided edge of the three coats. 2, The pupil.…

"Cell of Pellionia Daveauana, showing starch-grains. The black, crescent-shaped body on the end of each grain is the amyloplast." -Gager, 1916

Pellionia Plant Cell

"Cell of Pellionia Daveauana, showing starch-grains. The black, crescent-shaped body on the end of each…

A vertical section of an intestinal villus of a cat. Labels: a, the striated basilar border of the epithelium; b, columnar epithelium; c, goblet cells; d, centrai lymph vessel; e, unstriped muscular fibers; f, adenoid stroma of the villus in which are contained lymph corpuscles.

Intestinal Villus of a Cat

A vertical section of an intestinal villus of a cat. Labels: a, the striated basilar border of the epithelium;…

Section of the villus of a rat killed during fat absorption. Labels: ep, epithelium; str, striated border; c, lymph cells; c', lymph cells in the epithelium; l, central lacteal containing disintegrating lymph corpuscles

Villus of a Rat

Section of the villus of a rat killed during fat absorption. Labels: ep, epithelium; str, striated border;…

View of a section of the ovary of the cat. Labels: 1, outer covering and free border of the ovary; 1', attached border; 2, the ovarian stroma, presenting a fibrous and vascular structure; 3, granular substance lying external to the fibrous stroma; 4, blood-vessels; 5, ovigerms in their earliest stages occupying part of the granular layer near the surface; 6, ovigerms which have begun to enlarge and to pass more deeply into the ovary; 7, ovigerms round which the Graafian follicles and tunica granulosa are now formed and which have passed somewhat deeper into the ovary and are surrounded by the fibrous stroma; 8, more advanced Graafian follicle with the ovum imbedded in the layer of cells constituting the proligerous disc; 9, the most advanced follicle containing the ovum; 9', a follicle from which the ovum has accidentally escaped; IO, corpus luteum.

Ovary of the Cat

View of a section of the ovary of the cat. Labels: 1, outer covering and free border of the ovary; 1',…

These are very destructive parasites that attack valuable crops. Cluster-cups are orange-colored spores in little cup-like clusters.

Cluster-Cups on Barberry (Lower Side)

These are very destructive parasites that attack valuable crops. Cluster-cups are orange-colored spores…

These are very destructive parasites that attack valuable crops. Black lines and dots appear on the wheat forming masses of spores called winter spores.

Winter Spores (teleutospores) on Wheat

These are very destructive parasites that attack valuable crops. Black lines and dots appear on the…

Upper aperture of the larynx in the open (1) and shut (2) position. Labels: A, cushion of epiglottis; B, apices of arytenoids; C, arytenoepiglottidean folds; E, posterior aspect of cricoid; F, false vocal cords; G, rima glottidis,between true vocal cords; H, posterior border of thyroid cartilage; I, tip of great horn of hyoid.

Larynx is Open and Shut Positions

Upper aperture of the larynx in the open (1) and shut (2) position. Labels: A, cushion of epiglottis;…

These are very destructive parasites that attack valuable crops. Rusty lines and dots appear on the leaves, which are masses of spores called summer spores.

Summer Spores (Uredospores) on Wheat

These are very destructive parasites that attack valuable crops. Rusty lines and dots appear on the…

Showing the average position of the abdominal viscera with their surface markings. Labels: A, sterno-ensiform point; A', sterno-ensiform line; B, mid-epigastric point; B', mid-epigastric or transpyloric line; C, umbilical point; C', umbilical line; D, mid-hypogastric point; D', mid-hypogastric line; E, outer border of the right and left rectus abdominis; F, Monro's point- on the right spino-umbilical line at the outer border of the rectus abdomninis.

Abdominal Region

Showing the average position of the abdominal viscera with their surface markings. Labels: A, sterno-ensiform…