"Goad-spur, 13th or 14th century. A spur without a rowel and having a single more or less blunt point.…
"Fig 27. - Bones of the right wing of a duck, Clangula islandica, A, shoulder, omos; B, elbow, ancon;…
Illustration of a parallelogram with diagonals AC and BD intersecting at point O.
Illustration used to show "The two perpendiculars to the sides of an angle from any point in its bisector…
Illustration used to show "The two perpendiculars to the sides of an angle from any point not in its…
Illustration used to prove "The bisectors of the angles of a triangle are concurrent in a point which…
Illustration used to prove "The perpendicular bisectors of the sides of a triangle are concurrent in…
Illustration used to show "Any two medians of a triangle intersect each other in a trisection point…
This sign is used to indicate that a point of interest is nearby. A point of interest is a location…
This sign is used to indicate that a point of interest is nearby. A point of interest is a location…
This sign is used to indicate that a point of interest is nearby. A point of interest is a location…
This sign is used to indicate that a point of interest is nearby. A point of interest is a location…
"Gyroscope. Gyroscopic top, an instrument consisting of a heavy fly-wheel revolving about an axis one…
The sculpture of comus depicts comus (God of festivities) with the attending spirit descending on a…
The bowie knife is a type of sheath knife with a clip point. This knife has a unique twisted design.
Color flag of Algeria. Two equal vertical bands of green (hoist side) and white; a red, five-pointed…
Black and white outline flag of Algeria. Two equal vertical bands of green (hoist side) and white; a…
Color flag of Angola. Two equal horizontal bands of red (top) and black with a centered yellow emblem…
Black and white outline flag of Angola. Two equal horizontal bands of red (top) and black with a centered…
Color flag of Aruba. Blue, with two narrow, horizontal, yellow stripes across the lower portion and…
Black and white outline flag of Aruba. Blue, with two narrow, horizontal, yellow stripes across the…
Color flag of Australia. Blue with the flag of the UK in the upper hoist-side quadrant and a large seven-pointed…
Black and white outline flag of Australia. Blue with the flag of the UK in the upper hoist-side quadrant…
Color flag of Azerbaijan. Three equal horizontal bands of blue (top), red, and green; a crescent and…
Black and white outline flag of Azerbaijan. Three equal horizontal bands of blue (top), red, and green;…
Color flag of Burkina Faso. Two equal horizontal bands of red (top) and green with a yellow five-pointed…
Black and white outline flag of Burkina Faso. Two equal horizontal bands of red (top) and green with…
Color flag of Burundi. Divided by a white diagonal cross into red panels (top and bottom) and green…
Black and white outline flag of Burundi. Divided by a white diagonal cross into red panels (top and…
Color flag of Central African Republic. Four equal horizontal bands of blue (top), white, green, and…
Black and white outline flag of Central African Republic. Four equal horizontal bands of blue (top),…
Color flag of Chile. Two equal horizontal bands of white (top) and red; a blue square the same height…
Black and white outline flag of Chile. Two equal horizontal bands of white (top) and red; a blue square…
Color flag of China. Red with a large yellow five-pointed star and four smaller yellow five-pointed…
Black and white outline flag of China. Red with a large yellow five-pointed star and four smaller yellow…
Color flag of Congo, Democratic Republic of the. Sky blue field divided diagonally from the lower hoist…
Black and white outline flag of Congo, Democratic Republic of the. Sky blue field divided diagonally…
Color flag of Djibouti. Two equal horizontal bands of light blue (top) and light green with a white…
Black and white outline flag of Djibouti. Two equal horizontal bands of light blue (top) and light green…
Color flag of Ghana. Three equal horizontal bands of red (top), yellow, and green, with a large black…
Black and white outline flag of Ghana. Three equal horizontal bands of red (top), yellow, and green,…
Color flag of Guinea-Bissau. Two equal horizontal bands of yellow (top) and green with a vertical red…
Black and white outline flag of Guinea-Bissau. Two equal horizontal bands of yellow (top) and green…
Color flag of Israel. White with a blue hexagram (six-pointed linear star) known as the Magen David…
Black and white outline flag of Israel. White with a blue hexagram (six-pointed linear star) known as…
Color flag of Jordan. Three equal horizontal bands of black (top), representing the Abbassid Caliphate,…
Black and white outline flag of Jordan. Three equal horizontal bands of black (top), representing the…
Color flag of Liberia. 11 equal horizontal stripes of red (top and bottom) alternating with white; there…
Black and white outline flag of Liberia. 11 equal horizontal stripes of red (top and bottom) alternating…
Color flag of Malaysia. 14 equal horizontal stripes of red (top) alternating with white (bottom); there…
Black and white outline flag of Malaysia. 14 equal horizontal stripes of red (top) alternating with…
Color flag of Marshall Islands. Blue with two stripes radiating from the lower hoist-side corner - orange…
Black and white outline flag of Marshall Islands. Blue with two stripes radiating from the lower hoist-side…
Color flag of Mauritania. Green with a yellow five-pointed star above a yellow, horizontal crescent;…
Black and white outline flag of Mauritania. Green with a yellow five-pointed star above a yellow, horizontal…
Color flag of Morocco. Red with a green pentacle (five-pointed, linear star) known as Sulayman's (Solomon's)…
Black and white outline flag of Morocco. Red with a green pentacle (five-pointed, linear star) known…
Color flag of Nauru. Blue with a narrow, horizontal, yellow stripe across the center and a large white…