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Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: the broth, and the meat is all in Tags. But will not the heat overcome the attraction which the parts of the bones have for each other ? Father. The heat of boiling water will never effect this, but'a machine was invented several years ago, by Mr. Papin, for that purpose. It is called Papin's digester, and is used in taverns, and in many large families, for the purpose of dissolving bones, as completely as a lesser degree of heat Will liquefy jelly. On some future day I will show you an engraving of this machine, and explain its different parts, which are extremely simple. CONVERSATION IV. Of the Attraction of Cohesion. Father. I will now mention some other instances of this great law of nature. If two polished plates of marble, or brass, be put together with a little oil between them to fill up the pores in their surfaces, they will cohere so powerfully as to require a very considerable force to separate them.?Two globules of quicksilver placed very near to each other, will run together and form one large drop.?Drops of water will do the same.?Two circular pieces of cork placed upon water at about an inch distant will run together.?Balance a piece of smooth board on the end of a scale beam; then let it lie ftat on water, and five or six times its own weight will be required to separate it from the water. If a small globule of quicksilver be laid on clean paper, arid a piecfe of glass be brought into contact with it, the mercury will adhere to it, and be drawn away from the paper. But bring a larger globule into contact with the smaller one, arid it will forsake the glass, and unite with the other quicksilver. See Vol. H. Ccmver. XL. Charles. Did not you tell me that it was by means of the attraction of cohesion, that the little tea which is generally left at th...
| ISBN-13 | 9780217547055 |
|---|---|
| ISBN-10 | 0217547052 |
| Weight | 0.58 Pounds |
| Dimensions | 9.00 x 6.00 x 0.40 In |
| List Price | $19.99 |
| Format | Paperback |
|---|---|
| Pages | 172 pages |
| Publisher | |
| Published On | 2009-08-01 |
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