Journal . ratus to prevent the diffusioninto the open of the vapour emanating from the liquids a precaution, in addition to giving great security, leads alsoto a considerable saving, especially when one deals with suchliquids as petrol, benzol, alcohol, ether, etc., which emit vapoursin very large quantities even at normal temperature. The three accompanying tables (pages 109 and 110) giveinteresting information on this point. Table 1 gives the vapour tension of various liquids underatmospheric pressure for temperatures from 10° to 40° C. Table 2 gives for the same temperatures th
Journal . ratus to prevent the diffusioninto the open of the vapour emanating from the liquids a precaution, in addition to giving great security, leads alsoto a considerable saving, especially when one deals with suchliquids as petrol, benzol, alcohol, ether, etc., which emit vapoursin very large quantities even at normal temperature. The three accompanying tables (pages 109 and 110) giveinteresting information on this point. Table 1 gives the vapour tension of various liquids underatmospheric pressure for temperatures from 10° to 40° C. Table 2 gives for the same temperatures the correspondingweight in grammes of vapour saturating a volume of 1 cubicmetre at atmospheric pressure, such weights having been cal-culated with the help of the formula at the foot of the table. Table 3 shows the volume in litres of the liquid resulting fromthe condensation of the said weights of saturating vapour percubic metre. The magnitude of those figures is very striking and gives foodfor Fig. 13. Totalising Meter. Fig. 13 shows a meter of the authors design. The thumbscrew in the centre is pulled forward, thereby disconnecting the PNEUMATIC HANDLING OF LIQUIDS. 10i-> pointer from the internal mechanism. This pointer is set tothe figure which corresponds to the number of litres or gallonsit is desired to supply, and the thumb screw is pushed in, therebyfixing the pointer to the internal mechanism. As the liquid isallowed to flow, the pointer indicates the amount supplied, ,if it were set at 50, it would continue to turn backwards untilit coincided with the zero mark, which it would not do untilthe 50 litres or gallons had been supplied to the , if it were stopped at 10 the customer would know he hadreceived only (50 - 10) = 40 volumes. TABLEAU No. Maxima de Yapeurs a la Pression H = 760 mm. de Mercure. Tempera-turesCenti-grades. Pentane. C6HM Ether(C2H5)20 _ AlcoolEthylique. (C-H5)OH 10 283
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Keywords: ., bookcentury1800, bookdecade186, bookpublisherlondon, bookyear1861
