Part 50 (1/2)

Yes; because the basis of this science consists in an _analytical_ exaation of the properties and uses of all substances we are acquainted with; and the study of the effects of _heat_ and _eneral and subordinate laws

_analytical_, relating to analysis

_Investigation_, act of searching, or tracing out

_Subordinate_, inferior in nature, dignity or power

Relate a few e of Chemistry

Many of the wonderful operations of Nature, and the changes which take place in substances around us, are, by its means, revealed to us In every manufacture, art, or walk of life, the chehbor It is necessary to the farrowth of plants, the use of manures, and their proper application: and indispensable to the physician, that he may understand the animal economy, and the _effects_ which certain _causes_ cheetable, and mineral poisons The study is, therefore, an invaluable branch in the education of youth: it is useful, not only in the active, but the _ the foundation of an ardent and inquiring mind Even an everyday walk in the fields can be productive of instruction, by a knowledge of it;--and let us always ree is Power”

_Indispensable_, necessary, not to be done without

CHAPTER XIX

ATTRACTION, TIDES, GRAVITY, ARTESIAN WELLS, AIR, ANEROID BAROMETER, EAR-TRUMPET, STETHOSCOPE, AUDIPHONE, TELEPHONE, PHONOGRAPH, MICROPHONE, MEGAPHONE, TASIMETER, BATHOMETER, ANEMOMETER, CHRONOMETER

What is Attraction?

By attraction is meant that property or quality in the particles of bodies which makes them tend toward each other

Are there several kinds of attraction?

Yes Attraction has received different na to the circumstances under which it acts: The force which keeps the particles of ether to form bodies or masses, is called attraction of _cohesion_; that which ether only on their surfaces, is called _adhesion_; that which inclines different masses toward each other, as the earth and the heavenly bodies, is called _gravitation_; that which forces the particles of substances of different kinds to unite, is known under the name of _chemical attraction_; that which causes the needle of the compass to point constantly toward the poles of the earth, is _netic attraction_; that which is excited by friction in certain substances, is known as _electrical attraction_

How do you know that attraction exists through the whole universe?

This great universal laas first discovered by Sir Isaac Newton The sun and planets and other heavenly bodies are only guided in their path by gravitation

Do we experience this attraction upon our earth?

Yes; because our earth is carried around the sun by it; and, further, the tides show it very clearly

What are the Tides?

The ebbing and flowing of the sea, which regularly takes place twice in twenty-four hours The cause of the tides is the attraction of the sun, but chiefly of theon the waters of the ocean

What is Gravity?