This sign indicates that traffic in the left lane must turn left.

Left Turn Only, Black and White

This sign indicates that traffic in the left lane must turn left.

"The Straight Through Only sign may be used to require a road user in a particular lane to proceed straight through an intersection." -Federal Highway Administration, 2007

Straight Only, Black and White

"The Straight Through Only sign may be used to require a road user in a particular lane to proceed straight…

"If used, the Optional Movement Lane Control sign shall be used for two or more movements from a specific lane or to emphasize permitted movements. If used, the Optional Movement Lane Control sign shall be located at the intersection. If used, the Optional Movement Lane Control sign shall indicate all permissible movements from specific lanes."-Federal Highway Administration, 2007

Optional Movement Lane Control, Black and White

"If used, the Optional Movement Lane Control sign shall be used for two or more movements from a specific…

"The Keep Right sign may be used at locations where it is necessary for traffic to pass only to the right of a roadway feature or obstruction.""If used, the Keep Right sign should be installed as close as practical to approach ends of raised medians, parkways, islands, underpass piers, and at other locations where it is not readily apparent that traffic is required to keep to the right. The sign should be mounted on the face of or just in front of a pier or other obstruction separating opposite directions of traffic in the center of the highway such that traffic will have to pass to the right of the sign."-Federal Highway Administration, 2007

Keep Right, Black and White

"The Keep Right sign may be used at locations where it is necessary for traffic to pass only to the…

"The Keep Right sign may be used at locations where it is necessary for traffic to pass only to the right of a roadway feature or obstruction.""If used, the Keep Right sign should be installed as close as practical to approach ends of raised medians, parkways, islands, underpass piers, and at other locations where it is not readily apparent that traffic is required to keep to the right. The sign should be mounted on the face of or just in front of a pier or other obstruction separating opposite directions of traffic in the center of the highway such that traffic will have to pass to the right of the sign."-Federal Highway Administration, 2007

Keep Right, Black and White

"The Keep Right sign may be used at locations where it is necessary for traffic to pass only to the…

"The Keep Right sign may be used at locations where it is necessary for traffic to pass only to the right of a roadway feature or obstruction.""If used, the Keep Right sign should be installed as close as practical to approach ends of raised medians, parkways, islands, underpass piers, and at other locations where it is not readily apparent that traffic is required to keep to the right. The sign should be mounted on the face of or just in front of a pier or other obstruction separating opposite directions of traffic in the center of the highway such that traffic will have to pass to the right of the sign."-Federal Highway Administration, 2007

Keep Right, Black and White

"The Keep Right sign may be used at locations where it is necessary for traffic to pass only to the…

"The Keep Left sign may be used at locations where it is necessary for traffic to pass only to the left of a roadway feature or obstruction."-Federal Highway Administration, 2007

Keep Left, Black and White

"The Keep Left sign may be used at locations where it is necessary for traffic to pass only to the left…

"The DO NOT ENTER sign shall be used where traffic is prohibited from entering a restricted roadway."-Federal Highway Administration, 2007

Do Not Enter, Black and White

"The DO NOT ENTER sign shall be used where traffic is prohibited from entering a restricted roadway."…

"The WRONG WAY sign may be used as a supplement to the DO NOT ENTER sign where an exit ramp intersects a crossroad or a crossroad intersects a one-way roadway in a manner that does not physically discourage or prevent wrong-way entry." -Federal Highway Administration, 2007

Wrong Way, Black and White

"The WRONG WAY sign may be used as a supplement to the DO NOT ENTER sign where an exit ramp intersects…

"Selective Exclusion signs give notice to road users that State or local statutes or ordinances exclude designated types of traffic from using particular roadways or facilities."-Federal Highway Administration, 2007

No Trucks, Black and White

"Selective Exclusion signs give notice to road users that State or local statutes or ordinances exclude…

"Selective Exclusion signs give notice to road users that State or local statutes or ordinances exclude designated types of traffic from using particular roadways or facilities."-Federal Highway Administration, 2007

No Bicycles, Black and White

"Selective Exclusion signs give notice to road users that State or local statutes or ordinances exclude…

This sign indicates that the parking space is reserved for persons with disabilities.

Reserved Parking, Black and White

This sign indicates that the parking space is reserved for persons with disabilities.

"To make the parking regulations more effective and to improve public relations by giving a definite warning, a sign reading TOW-AWAY ZONE may be appended to, or incorporated in, any parking prohibition sign. The Tow-Away Zone symbol sign may be used instead of the word message sign. The sign may have either a black or red legend and border on a white background." -Federal Highway Administration, 2007

Tow-Away Zone, Black and White

"To make the parking regulations more effective and to improve public relations by giving a definite…

"To make the parking regulations more effective and to improve public relations by giving a definite warning, a sign reading TOW-AWAY ZONE may be appended to, or incorporated in, any parking prohibition sign. The Tow-Away Zone symbol sign may be used instead of the word message sign. The sign may have either a black or red legend and border on a white background." -Federal Highway Administration, 2007

Tow-Away Zone, Outline

"To make the parking regulations more effective and to improve public relations by giving a definite…

"To make the parking regulations more effective and to improve public relations by giving a definite warning, a sign reading TOW-AWAY ZONE may be appended to, or incorporated in, any parking prohibition sign. The Tow-Away Zone symbol sign may be used instead of the word message sign. The sign may have either a black or red legend and border on a white background." -Federal Highway Administration, 2007

Tow-Away Zone, Silhouette

"To make the parking regulations more effective and to improve public relations by giving a definite…

The "NO PARKING sign may be used to prohibit any parking along a given highway."-Federal Highway Administration, 2007

No Parking, Black and White

The "NO PARKING sign may be used to prohibit any parking along a given highway." -Federal Highway Administration,…

"The No Pedestrian Crossing sign may be used to prohibit pedestrians from crossing a roadway at an undesirable location or in front of a school or other public building where a crossing is not designated."-Federal Highway Administration, 2007

No Pedestrian Crossing, Black and White

"The No Pedestrian Crossing sign may be used to prohibit pedestrians from crossing a roadway at an undesirable…

"The No Hitchhiking sign may be used to prohibit standing in or adjacent to the roadway for the purpose of soliciting a ride."-Federal Highway Administration, 2007

No Hitchhiking, Black and White

"The No Hitchhiking sign may be used to prohibit standing in or adjacent to the roadway for the purpose…

"When a National Network route is signed, the National Network sign shall be used."-Federal Highway Administration, 2007

National Network, Black and White

"When a National Network route is signed, the National Network sign shall be used." -Federal Highway…

"The National Network Prohibition sign may be used to identify routes, portions of routes, and ramps where trucks are prohibited. The sign may also be used to mark the ends of designated routes."-Federal Highway Administration, 2007

National Network Prohibition, Black and White

"The National Network Prohibition sign may be used to identify routes, portions of routes, and ramps…

"The National Network Prohibition sign may be used to identify routes, portions of routes, and ramps where trucks are prohibited. The sign may also be used to mark the ends of designated routes."-Federal Highway Administration, 2007

National Network Prohibition, Black and White

"The National Network Prohibition sign may be used to identify routes, portions of routes, and ramps…

The workmanship of the white marble columns, and of the large squared stones which are joined without cement, shows a cultivated skill.

Elevation of Platform at Pasargadæ

The workmanship of the white marble columns, and of the large squared stones which are joined without…

Oil stoves are able to deliver enough heat for a 3000 square foot home and with burn rates as low as 1/16 gallon per hour for smaller homes it can be a very efficient way to heat. Super clean blue flame burn technology actually vaporizes the fuel and burns at efficiencies of up to 81 percent. They burn soot free, smoke free, smell free and provide an even steady heat for your home.

Oil Stove

Oil stoves are able to deliver enough heat for a 3000 square foot home and with burn rates as low as…

"The contours are sketched lightly in pencil and the hachures drawn perpendicular to them, starting at the summit and making heavier strokes for steeper slopes. The rows of strokes should touch the pencil line, to avoid white streaks along the contours." —French, 1911

Shoreline Contour Map Method of Execution

"The contours are sketched lightly in pencil and the hachures drawn perpendicular to them, starting…

A blue print frame used to make copies of mechanical drawing. The process is done by exposing a sensitized paper in contact with the tracing paper to the light source in the frame. A chemical reaction takes place when washing with water to create a strong blue color, creating the image.

Blue Print Frame

A blue print frame used to make copies of mechanical drawing. The process is done by exposing a sensitized…

"Showing a system with chromatic difference of spherical aberration. O" ₌ image of O for red light; O'" for blue. The system is under—corrected for red, and over—corrected for blue rays." —Encyclopaedia Britannica, 1910

Light Correction of Blue and Red Lights using Spherical Lens

"Showing a system with chromatic difference of spherical aberration. O" ₌ image of O for red light;…

"They have also a shorter focus for red, and a longer one for blue, and thus magnify the red image more than the blue; and as the objective gives a large blue and small red image, the two cancel one another and a colourless image is produced." —Encyclopaedia Britannica, 1910

Huyegenian Eyepiece Diagram Showing Lens Refraction

"They have also a shorter focus for red, and a longer one for blue, and thus magnify the red image more…

A usually automatic machine for washing clothes and linens.

Early Washing Machine

A usually automatic machine for washing clothes and linens.

A usually automatic machine for washing clothes and linens.

Washing Machine

A usually automatic machine for washing clothes and linens.

A steel bucket filled with sand which is used to put out fires. Typically, fire buckets are painted bright red and have the word 'Fire' stencilled on them in white lettering. They are placed in prominent positions in rooms or corridors.

Fire Bucket

A steel bucket filled with sand which is used to put out fires. Typically, fire buckets are painted…

Large willow tree of Eurasia and North Africa having greyish canescent leaves and grey bark

White Willow

Large willow tree of Eurasia and North Africa having greyish canescent leaves and grey bark

Tall perennial Old World salvia with violet-blue flowers; found in open grasslands

Salvia Pratensis

Tall perennial Old World salvia with violet-blue flowers; found in open grasslands

This plant is thought to have originated in Europe, featuring rich pink and white flowers.

Saponaria Officinalis

This plant is thought to have originated in Europe, featuring rich pink and white flowers.

This is a tropical fruiting tree.

White Sapote

This is a tropical fruiting tree.

This perennial features white flowers, and thin racemes.

Saururus Cernuus

This perennial features white flowers, and thin racemes.

This plant belongs to the scillia showing leaves that are usually pink and blue.

Bifolia Scilla

This plant belongs to the scillia showing leaves that are usually pink and blue.

This plant features rich and showy yellow flowers.

Wall Pepper

This plant features rich and showy yellow flowers.

This herb is commonly used for its blue, red, and purple flowers.

Florist Cineraria

This herb is commonly used for its blue, red, and purple flowers.

This herb belongs to the canary islands, featuring flowers that look like daisy's. Flowers for this herb are usually either purple, red, or blue.

Senecio Cruentus

This herb belongs to the canary islands, featuring flowers that look like daisy's. Flowers for this…

This perennial is known for its white cone shaped flowers.

Shortia Galacifolia

This perennial is known for its white cone shaped flowers.

A vine belonging to the smilarcaceae family, their leaves are gray and white.

Smilax Glauca

A vine belonging to the smilarcaceae family, their leaves are gray and white.

A vine which is native to Costa Rica, featuring vines and blue flowers.

Solanum Wendlandii

A vine which is native to Costa Rica, featuring vines and blue flowers.

A roundheaded tree with dark green leaves, bearing rich white flowers.

Sophora Japonica

A roundheaded tree with dark green leaves, bearing rich white flowers.

Shrub with white flowers that blossom in the spring.

Spiraea Prunifolia

Shrub with white flowers that blossom in the spring.

A large shrub usually bearing white flowers.

Syringa Japonica

A large shrub usually bearing white flowers.

This is a white clover, bearing pink flowers and glossy leaves. This flora is common the US.

Trifolium Repens

This is a white clover, bearing pink flowers and glossy leaves. This flora is common the US.

The White Trillium is a perennial belonging to the lily family.

Trillium Grandiflorum

The White Trillium is a perennial belonging to the lily family.

A blue orchid, native to India.

Vanda Caerulea

A blue orchid, native to India.

Shrubs related to the honeysuckle, featuring clusters of little white flowers.

Viburnum Pubescens

Shrubs related to the honeysuckle, featuring clusters of little white flowers.

Old world shrub with clusters of white flowers and red fruit.

Viburnum Opulus

Old world shrub with clusters of white flowers and red fruit.

Commonly cultivated groundcover bearing dark leaves, and blue toned flowers.

Vinca Minor

Commonly cultivated groundcover bearing dark leaves, and blue toned flowers.

Violet native to Europe, bearing white flowers.

Viola Odorata

Violet native to Europe, bearing white flowers.

Violet of blue color.

Blue Violet

Violet of blue color.

African plant known for a white spathe and yellow spad.

Calla Lily

African plant known for a white spathe and yellow spad.

A buckwheat of the Fagopyrum genus, an annual Asian plant. Plant features white and pink flowers.

Fagopyrum Esculentum

A buckwheat of the Fagopyrum genus, an annual Asian plant. Plant features white and pink flowers.

This perennial is native to both South Africa and Australia; plant bears blue daisy-like flowers.

Blue Daisy

This perennial is native to both South Africa and Australia; plant bears blue daisy-like flowers.

An image of laguncularia racemosa, or white mangrove. They grow in coastal areas of bays, lagoons, and tidal creeks. This white mangrove has aerating roots, or roots that rdide above the ground.

Aerating Roots of Swamp Mangrove

An image of laguncularia racemosa, or white mangrove. They grow in coastal areas of bays, lagoons, and…

Also know as cicuta maculata. This plant is native to temperate areas of the Northern Hemisphere, and is identified by having small green or white flowers hanging in an umbrella shape. It is considered one of America's most toxic plants to humans.

American Water Hemlock

Also know as cicuta maculata. This plant is native to temperate areas of the Northern Hemisphere, and…

Also known as Cyanocitta cristata. These birds have a loud, harsh voice and striking colors. They occasionally prey upon the eggs or young of other birds, but mostly feed largely upon grain and other hard seeds. They are located broadly throughout North America.

The Common Blue Jay

Also known as Cyanocitta cristata. These birds have a loud, harsh voice and striking colors. They occasionally…

Often called Plymouth Rocks. There are seven varieties: barred, blue, buff, Columbian, partridge, silver-penciled and white. They originated in the United States.

Pair of Barred Plymouth Rocks

Often called Plymouth Rocks. There are seven varieties: barred, blue, buff, Columbian, partridge, silver-penciled…