Chemical Age Volume 9

Chemical Age Volume 9

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 edition. Excerpt: ...This volume of gas is of course measured at the temperature of the flue and must be reduced to standard conditions. V = volume of gas at 0C, T: degrees C, and t = degrees F. The anemometer is not a very accurate method of measuring the flow of gases due to a number of causes, one of which is that the velocity of gases in the center of a flue is greater than at its sides, etc. On account of variations in flow only recording instruments are of much value for actual measuring purposes. An instrument depending on the same principles as the above has been brought out by the firm of Paul de Bruyn Duesseldorf, which has proved re-, liable for measuring gas flow in flues, etc.-The working of the apparatus is explained by Fig. 19, which gives a sectional view. The two tubes bent similar to those used with the anemometer are connected to the tanks, P and Q, respectively. These simply serve to take up and equalize any sudden changes in pressure. P is connected to the tube bent towards the gas and communicates with the interior of F, a bell floating in the ring-shaped outer compartment of the compartment, G. The low pressure tube in the gas pipe communicates through Q with D, the hollow chamber which makes the bell float. According to the changes of pressure in F and D the bell will rise or fall and will lift the lever, L, by means of the rod, H. The chamber, G, is kept air tight by the mercury seal, M. In order to avoid the error arising from the varying air pressure on this seal, there is a compensating device consisting of a similar seal attached to the other end of the lever. The lever communicates with a pen which moves o_ver the revolving drum, K. The apparatus is standardized so that the velocity per second is indicated on the recording paper....show more

Product details

  • Paperback | 152 pages
  • 189 x 246 x 8mm | 286g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 123693833X
  • 9781236938336