Diagram of a lancelet. The mouth is surrounded by a circle of tentacles; below the notochord is a row…
The right ventricle is in the shape of a crescent moon and the left ventricle is in the shape of a circle.
"Battle of Pea Ridge, Ark., fought March 6th, 7th and 8th, 1862, between the Federal forces, 13,000…
"Bombardment of Fredericksburg, Va., by the army of the Potomac, commanded by General Burnside, Thursday,…
"Grant's Campaign in Virginia. The Battle of Coal Harbor, June 1st, 1864. On the 1st of June the Confederates…
Chimney Point Landing. This view is taken from the green in front of the inn at Chimney Point, looking…
"Reverse of a Massachusetts Treasury note. This is a fac simile of the device on the back of one of…
"Pulaski's Banner. On one side of the banner are the letters U. S., and in a circle around them the…
"Battle of Pea Ridge, Ark., fought March 6th, 7th and 8th, 1862, between the Federal forces, 13,000…
"Battle of Pea Ridge, Ark., fought March 6th, 7th and 8th, 1862, between the Federal forces, 13,000…
"The Peacock-butterfly, V. Io, has the edges of the wings denticulated; above they are of a…
"The spiders with which we in temperate climates are most acquainted are of small size, but in hot regions…
"The Corn flower is a well-known composite weed of cornfields, universally known and admired for the…
"The Corn flower is a well-known composite weed of cornfields, universally known and admired for the…
"Corona (a crown) in astronomy is a halo or luminous circle round one of the heavenly bodies; specifically…
"The walrus, also called the morse, seahorse, and sea cow, is now confined to the regions within the…
"Yucca is a genus of American plants, natural order Liliaceæ popularly known as Adam's needle.…
"These animals are generally called Tree-corals, on account of the forms of the polypidons…
"The Iron Crown was a golden crown, set with precious stones, with which anciently the kings of Italy,…
"A Ring is any circle or section of a cylinder. Rings of gold, silver, and of other metals and materials…
"A Ring is any circle or section of a cylinder. Rings of gold, silver, and of other metals and materials…
"A Ring is any circle or section of a cylinder. Rings of gold, silver, and of other metals and materials…
"Shark is an English popular name for any individual of the group Selachoidei. Sharks are scaleless,…
"This game is played by means of seven pins, made so that they may either be driven into the ground…
"Raise the arm vertically to its full extent and describe horizontal circles." — Moss, 1914
"It has four cardinal points, N, E, S, and W marked, as well as a circle graduated in degrees from sero…
"When an electromagnet is U-shaped, the coils around the two ends of the bent iron core are so wound…
A cone is a solid whose base is a circle, and whose convex surface tapers uniformly to a point called…
A roman moulding, called a Bead. It is a molding consisting of a semi-circle on a flat surface.…
A roman moulding, called a Cavetto. It consists of a quarter circle with a sunk fillet below.…
A Portuguese sea explorer who sailed for both Portugal and Spain. He was the first to sail from Europe…
A ruminany quadruped native to the Rocky Mountains, ranging from Idaho to the Arctic Circle. it is a…
a solid which may be concieved as generated by the revolution of a rectangle about one of its sides.
A solid belonging to the isometric system, with 24 trapezoidal planes. It is the parallel hemihedral…
An instrument consisting essentially of a dipping needle, a verticle graduated circle whose center coincides…