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Download Publications of the University of Manchester Volume 10; Economic Series

Publications of the University of Manchester Volume 10; Economic Series by University Of Manchester
Publications of the University of Manchester Volume 10; Economic Series
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Author: University Of Manchester
Page Count: 50 pages
Published Date: 01 Mar 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781130149425
Download Link: Publications of the University of Manchester Volume 10; Economic Series
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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. 1908 Excerpt: ...viewed in a well darkened room the blue light of the silent discharge, which is an indication of good working order, can be observed. Each unit is of rectangular form, requires 1 H.P., and yields from 13 5--27 gms. ozone per hour, according to the dryness of the air and the rate of flow. In case of interruption of the current or of the air supply, as is, for instance, brought about by fracture of the glass cylinder, an automatic device stops the flow of water in the tower and indicates the faulty cell. Vosmaer Process. An experimental plant using this process was worked for some time at Nieuwersluis on the river Vecht, near Amsterdam. The capacity of the plant was 2 K.W. and purified 300 gallons per hour. This process has now been installed at Philadelphia by the "Water Improvement Co." and brought to a higher state of efficiency. It is expected that it will be adopted by the City for the purification of 345,000,000 gallons daily; the estimated cost of the installation being $700,000. Ozone purification should prove of great value in Philadelphia on account of the typhoid epidemics which are at present so prevalent on account of the bad condition of the water. The advantage which the Vosmaer system claims over the Siemens and Halske is that there are no solid dielectrics between the dischargers. The brush discharge is produced between sharp pointed combs and flat electrodes. The voltaic arc and spark discharges are prevented by a special system of connections. By means of a step up transformer a potential of 5,000 volts is obtained. The current passes through a high tension choking coil, and is connected with the ozonising apparatus after being shunted by a condenser which raises the effective E.M.F. to about 10,000 volts. Air is drawn by means of...

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