Elementary Lessons in Physics Author:John B. Gifford General Books publication date: 2009 Original publication date: 1894 Original Publisher: Thompson, Brown, and Company Subjects: Physics Notes: This is a black and white OCR reprint of the original. It has no illustrations and there may be typos or missing text. When you buy the General Books edition of this book you get free trial access to... more » Million-Books.com where you can select from more than a million books for free. Excerpt: HI. STATES OF MATTER. 1. LIQUIDS. EXPERIMENT 5. (At bome.) Put your finger into water, and stir it round. Obs. 1. Observe the ease with which the finger is moved through the water. Inf. 1. Make an inference in regard to the movement of the particles of water among themselves. Remove your finger, keeping the end downward. Obs. 2. Observe what forms at the end. Inf. 2. Infer whether the particles tend to separate or to cling together. 1. What two things do you find to be true of the particles of water ? 2. Name three other substances of which the same is true. 3. What common name may you give to these substances ? 4. What would you say that liquids are? (See question 1, above.) Derive liquid. 2. SOLIDS. 5. Compare wood, iron, and glass with liquids. In which of the above points do they agree? (See question 1.) In which do they differ ? EXPERIMENT 6. (At school.) Fasten one end of a stick of sealing wax firmly in a horizontal position. Leaving the other end unsupported, suspend from it a weight of one quarter of a pound. Fig. 2. Obs. Let it remain for two days, observing the effect from time to time. What is the result ? Inf. 1. Make an inference in regard to the movement of the molecules among themselves. Inf. 2. Give a common name for such substances as wood, iron, and wax. What have you found to be the distinguishing properties of these substances? (See question 5, above, and Inf. 1.) How would you define solids. Derive the term. 3. AERIFORM MATTER. EXPERIMENT 7. (At school.) Fit two horse-radish b...« less