Elements of Chemistry for Common and High Schools

Elements of Chemistry for Common and High Schools

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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. 1875 edition. Excerpt: ...live in cities and large towns these two gases are in common use. Illuminating gas which lights their houses is a mixture of them. We do not mean that it contains nothing else, fpr there are small quantities of several other gases with them, but the value of illuminating gas is due to marsh gas and olefiant gas, and it would be better than it ever is, if it contained these two alone. Is illuminating gas obtained from wood?--The illuminating gas for lighting cities and towns is not obtained by heating wood; to do so would make it too costly. The sub-stance generally used is bituminous coal. How is it obtained from coal?--If bituminous coal be heated just as the wood-was heated in the experiment which we have studied, (Fig. 42) a large quantity of the mixture of gases is caught in the receiver. Indeed that experiment may help us to understand the operation as conducted on a large scale. What is used instead of the flask?--Instead of the flask, in which the wood was heated, there are several long iron cylinders set in a furnace. Etch one of these will hold as much as one hundred or one hundred and fifty pounds of coal. When these cylinders have been filled with coal, they are shut air-tight, and the furnace fire is kindled. The intense heat soon changes the volatile parts of the coal to gas, and drives it out of the cylinders just as the lamp flame did with the wood in the experiment shown in figure. What is used instead of the bottle?--Instead o f the bottle in which the liquids were caught, (Fig. 42) there are several different things through which the impure gas must go. The most important of these are: 1st. A horizontal cylinder, quite large and partly full of water. 2nd. Several tall upright pipes so fixed that the gas must go up ono and down...show more

Product details

  • Paperback | 50 pages
  • 189 x 246 x 3mm | 109g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236663853
  • 9781236663856