Items related to Oral Training Lessons in Natural Science and General...
Oral Training Lessons in Natural Science and General Knowledge; Embracing the Subjects of Astronomy, Anatomy, Physiology, Chemistry, Mathematical ... Words, Etc. Intended for Teachers of Public S - Softcover
Synopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated.1871 Excerpt: ... spoonful of hydrochloric acid diluted with twice as much water. Then insert the cork and tube. The carbonic acid, after all the common air in the glass is expelled, will issue abundantly. It is so heavy that it can be collected in glass or other vessels, such as tumblers, at the extremity of the tube. It can even be poured from one glass to another.. A candle-flame may be extinguished by pouring it gently from a glass upon the flame. A lighted candle attached to a wire and lowered into a glass of carbonic acid is immediately extinguished.) Now let us revise. We have just described another process for generating or.... producing, the gas which is contained in.... limestone, which is.... carbonic acid. We introduce some substance, which likes the lime, better than.... the carbonic acid does. This substance is.... hydrochloric acid. It combines with the.... lime, and allows the carbonic acid to escape; it passes out through this bent.... tube. LESSON L. NATURAL SCIENCE--LIGHT AND HEAT: REFRACTION, REFLECTION AND ABSORPTION. You will all remember that we named three things in Nature that are considered to have no weight. They are said to be imponderable. What are they? Harry? Light, Heat, and Electricity. (See Lesson xxix.) What about them? Annie?.... They are the three imponderable bodies of Nature. Raise hands all who will make the complete statement. Ella? (She makes it.) Now our principal source of light and heat is the sun. The sun sends off or emits, its light and heat, in straight lines called.... rays., The word which means "to send off in rays "is radiate. Frank, you may state this again.... The sun radiates its light and heat. We are now prepared to extend this subject further. When the rays of.... light, or.... heat, pass off from any source such as....
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