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(1644-1718) Founder of Pennsylvania.

William Penn

(1644-1718) Founder of Pennsylvania.

(1821-1893) British explorer who undertook the exploration of the Nile discovering its source.

Sir Samuel White Baker

(1821-1893) British explorer who undertook the exploration of the Nile discovering its source.

(b. 1832) American diplomat and author

Andrew D. White

(b. 1832) American diplomat and author

(1819-1892) American poet. Author of <I>Leaves of Grass.</em>

Walt Whitman

(1819-1892) American poet. Author of Leaves of Grass.

The guava plant is prized for its fruit which resembles an apple or pear, and can have white, pink or red flesh.

Guava

The guava plant is prized for its fruit which resembles an apple or pear, and can have white, pink or…

Wading birds with long, slender bills found in warmer climates of both hemispheres. The Sacred ibis of the ancient Egyptians is white in color with long glossy, black plumes on the wings.

Sacred Ibis

Wading birds with long, slender bills found in warmer climates of both hemispheres. The Sacred ibis…

A large white bear that lives in the Arctic regions of North America. They are powerful swimmers and eat a variety of things including seal. They can run quickly across the ice due to their hairy soles.

Polar Bear

A large white bear that lives in the Arctic regions of North America. They are powerful swimmers and…

The sloth differs from all other arboreal four-legged mammals in its manner of climbing. It always has its back downward. It eats leaves and moves very slowly and deliberately.

Sloth

The sloth differs from all other arboreal four-legged mammals in its manner of climbing. It always has…

A hoofed, herbivorous mammal found in Africa. It is known for its distinct and regular stripes of black or brown on a white background.

Zebra

A hoofed, herbivorous mammal found in Africa. It is known for its distinct and regular stripes of black…

Nightingale, a small creeping bird seen running up and down the trunks of trees, getting its name from its habit of hatching open nuts it has previously wedged in the bark of trees, (Beach, 1909).

White-breasted Nuthatch

Nightingale, a small creeping bird seen running up and down the trunks of trees, getting its name from…

Oaks are easily recognized by their characteristic leaves and especially by their peculiar fruit, the well-known acorn.

Oak

Oaks are easily recognized by their characteristic leaves and especially by their peculiar fruit, the…

Partridge, a game bird belonging to the grouse family.

Partridge

Partridge, a game bird belonging to the grouse family.

Poison-ivy, a climbing or trailing shrub with variable three-foliate leaves, aerial rootlets and greenish flowers.

Poison Ivy

Poison-ivy, a climbing or trailing shrub with variable three-foliate leaves, aerial rootlets and greenish…

The name mushroom is generally applied to those soft white umbrella-shaped growths considered good to eat. It is always dangerous to eat mushrooms gathered in the woods by anyone other than an experienced collector.

Agaric mushroom

The name mushroom is generally applied to those soft white umbrella-shaped growths considered good to…

The name mushroom is generally applied to those soft white umbrella-shaped growths considered good to eat. It is always dangerous to eat mushrooms gathered in the woods by anyone other than an experienced collector.

mushroom

The name mushroom is generally applied to those soft white umbrella-shaped growths considered good to…

The swan has been an object of admiration for its graceful neck, oval head, prominent beak, soft, and white plumage.

Swan

The swan has been an object of admiration for its graceful neck, oval head, prominent beak, soft, and…

The swan has been an object of admiration for its graceful neck, oval head, prominent beak, soft, and white plumage.

Black Swan

The swan has been an object of admiration for its graceful neck, oval head, prominent beak, soft, and…

Pelicans often travel in considerable flocks, visiting the mouths of rivers or sea coasts.

Pelican

Pelicans often travel in considerable flocks, visiting the mouths of rivers or sea coasts.

These birds have long toes and claws that permit them to walk easily across leaves of tropical aquatic plants.

Jacana

These birds have long toes and claws that permit them to walk easily across leaves of tropical aquatic…

Wading birds with long, slender bills found in warmer climates of both hemispheres. The Sacred ibis of the ancient Egyptians is white in color with long glossy, black plumes on the wings.

Sacred Ibis

Wading birds with long, slender bills found in warmer climates of both hemispheres. The Sacred ibis…

Storks live in moist and swampy places by the side of pools and rivers.

Stork

Storks live in moist and swampy places by the side of pools and rivers.

White House in Washington, D.C., early 1900s view

White House, Early 1900s

White House in Washington, D.C., early 1900s view

(1819-1892) American poet. Author of <I>Leaves of Grass.</em>

Walt Whitman

(1819-1892) American poet. Author of Leaves of Grass.

The fallow deer may easily be known from the stag by its smaller size and flat horns, and the white spots that cover the body, (Wood, 1896).

Deer

The fallow deer may easily be known from the stag by its smaller size and flat horns, and the white…

Galls on leaf of rose. The location of a parasite is often marked by swellings of peculiar and fantastic or beautiful forms (galls) that grow on leaves and stems.

Gall

Galls on leaf of rose. The location of a parasite is often marked by swellings of peculiar and fantastic…

Galls on leaf of rose. The location of a parasite is often marked by swellings of peculiar and fantastic or beautiful forms (galls) that grow on leaves and stems.

Gall

Galls on leaf of rose. The location of a parasite is often marked by swellings of peculiar and fantastic…

Galls on stem of grape. The location of a parasite is often marked by swellings of peculiar and fantastic or beautiful forms (galls) that grow on leaves and stems.

Gall

Galls on stem of grape. The location of a parasite is often marked by swellings of peculiar and fantastic…

A rosette of leaves of Venus's flytrap seen from above.

Venus Flytrap

A rosette of leaves of Venus's flytrap seen from above.

Here is leaf that is shaped like the head of an arrow.

Leaf

Here is leaf that is shaped like the head of an arrow.

Here is leaf that is shaped like a lance.

Leaf

Here is leaf that is shaped like a lance.

Here is leaf that is shaped like a trowel.

Leaf

Here is leaf that is shaped like a trowel.

Here is leaf that is shaped like a fiddle.

Leaf

Here is leaf that is shaped like a fiddle.

Here is a leaf that is shaped like a shield.

Leaf

Here is a leaf that is shaped like a shield.

Here is a leaf that has a tendril on the end of it which clasps around whatever it touches.

Leaf

Here is a leaf that has a tendril on the end of it which clasps around whatever it touches.

This leaf is notched all around its edge.

Leaf

This leaf is notched all around its edge.

This leaf is notched all around its edge.

Leaf

This leaf is notched all around its edge.

This leaf is spread out like a hand.

Leaf

This leaf is spread out like a hand.

This leaf is spread out like a hand.

Leaf

This leaf is spread out like a hand.

Leaves are arranged in a great many different ways on their stems. Here are three leaves together on a stem.

Leaf

Leaves are arranged in a great many different ways on their stems. Here are three leaves together on…

Leaves are arranged in a great many different ways on their stems. Here the leaf-stem has three little branches, and each branch has three leaves.

Leaf

Leaves are arranged in a great many different ways on their stems. Here the leaf-stem has three little…

Leaves are arranged in a great many different ways on their stems. On this leaf-stem are a great many leaves.

Leaf

Leaves are arranged in a great many different ways on their stems. On this leaf-stem are a great many…

Here is a leaf of the pitcher plant. You see that it has an opening at the upper end. It can hold considerable water.

Pitcher Plant Leaf

Here is a leaf of the pitcher plant. You see that it has an opening at the upper end. It can hold considerable…

Here is a leaf of the Venus's fly trap which is a spring trap for flies and other insects. Here you see the leaf as it is spread out, wide open.

Venus Fly Trap Leaf

Here is a leaf of the Venus's fly trap which is a spring trap for flies and other insects. Here you…

Here is a leaf of the Venus's fly trap which is a spring trap for flies and other insects. The two parts of the leaf close together and the points on the edges are locked together.

Venus Fly Trap Leaf

Here is a leaf of the Venus's fly trap which is a spring trap for flies and other insects. The two parts…

This is the leaf of the common fern, or brake. On the back of the leaf are spores.

Fern Leaf

This is the leaf of the common fern, or brake. On the back of the leaf are spores.

This is the bud of a Horse-Chestnut. This will open and the leaves will push out.

Horse-Chestnut Bud

This is the bud of a Horse-Chestnut. This will open and the leaves will push out.

Stourton bore Sable a bend gold between six fountains. The fountain is a rounded charged with waves of white and blue

Stourton

Stourton bore Sable a bend gold between six fountains. The fountain is a rounded charged with waves…

Lilies with their stalks and leaves are in the grant of arms to Eton College

Eton College

Lilies with their stalks and leaves are in the grant of arms to Eton College

King holding a white dove

King

King holding a white dove

Fairy with wand standing on a leaf.

Fairy with wand

Fairy with wand standing on a leaf.

Fairy with duster standing on a leaf.

Fairy with duster

Fairy with duster standing on a leaf.

Fairy sitting on a leaf.

Fairy sitting

Fairy sitting on a leaf.

Fairy dancing on a leaf.

Fairy dancing

Fairy dancing on a leaf.

Fairy scrubbing a leaf.

Fairy scrubbing

Fairy scrubbing a leaf.

Fairy sweeping on a leaf.

Fairy sweeping

Fairy sweeping on a leaf.

Fairy sewing on a leaf.

Fairy sewing

Fairy sewing on a leaf.

Bookplate of two children reading with scenes from the book unfolding in the background.

Children Reading

Bookplate of two children reading with scenes from the book unfolding in the background.

Leaves and flowers

Leaves and flowers

Leaves and flowers

If you fix your eyes on the two white spaces between the lines it will appear as if the top space becomes wider at the ends, and as if the bottom space becomes wider in the middle. But both lines are perfectly straight.

Visual Illusion: Sloping Lines

If you fix your eyes on the two white spaces between the lines it will appear as if the top space becomes…

This is the staminate flower of White Ash, Fraxinus americana, (Keeler, 1915).

White Ash Flower

This is the staminate flower of White Ash, Fraxinus americana, (Keeler, 1915).