Scene from the story, "Bat, Bat."

Boy and Bat

Scene from the story, "Bat, Bat."

A piece of furniture consisting of a seat, legs, back, and often arms, designed to accommodate one person.

Dining Chair

A piece of furniture consisting of a seat, legs, back, and often arms, designed to accommodate one person.

"The spade is commonly used for digging and trenching, but much of this work is now better done by means of Parkes's diggging-fork, which is both handier and lighter, and breaks up the ground better than the spade." — Encyclopedia Britannica, 1893

Digging-Fork

"The spade is commonly used for digging and trenching, but much of this work is now better done by means…

The Earth in Space.

Earth

The Earth in Space.

Cause of the Curved Shape of the Earth's Orbit.

Earth Orbit

Cause of the Curved Shape of the Earth's Orbit.

"...a certain amount of salt may be successfully dropped into a tumbler brim-full of water without causing it to overflow. The particles of water, which are supposed to be globular, do not everywhere touch each other, and the particles of salt are accommodated in the interstices between them." —Quackenbos 1859

Water with Salt Molecules

"...a certain amount of salt may be successfully dropped into a tumbler brim-full of water without causing…

The shape of the earth is that of a round ball or sphere slightly flattened at two opposite sides. Such a body is termed a <em>spheroid</em>. There are two kinds of spheroids-<em>oblate</em> and <em>prolate</em>; the former as the shape of an orange, the latter that of a lemon. The straight line that runs through the centre of a sphere or spheroid and terminates at the circumference is called the <em>diameter</em>. If the sphere rotates-that is, moves around like a top-the diameter on which it turns is called the <em>axis</em>. In the oblate spheroid the axis is the shorter diameter; in the prolate spheroid the axis is the longer diameter.

Oblate and Prolate Spheroid

The shape of the earth is that of a round ball or sphere slightly flattened at two opposite sides. Such…

Signal for an interval.

Signal interval

Signal for an interval.