Journal . ations to be made to theLocal Secretary. OX THE VARIOUS FORMS OF FILTERPUMPS OB WATER-JET ASPIRATORS. 1 V, , Since the publication of Sprengels paper on thevacuum in 1865, and Bunsens paper on an improvedle of filtration i: 9, the applications of the air pump have become so familiar as to be consideredalmost indispensable in chemical ami physical hi bora- As commonly understood, the air pump and theaspirator are machines which differ not in principle,but only in degree, anil Geissler, Joule, and othershave constructed mercurial aspirators which are airpumps capabl
Journal . ations to be made to theLocal Secretary. OX THE VARIOUS FORMS OF FILTERPUMPS OB WATER-JET ASPIRATORS. 1 V, , Since the publication of Sprengels paper on thevacuum in 1865, and Bunsens paper on an improvedle of filtration i: 9, the applications of the air pump have become so familiar as to be consideredalmost indispensable in chemical ami physical hi bora- As commonly understood, the air pump and theaspirator are machines which differ not in principle,but only in degree, anil Geissler, Joule, and othershave constructed mercurial aspirators which are airpumps capable of giving very perfect vacua. The pumps used in chemical and physical laltories may be classified as follows :— 1. Barometric or weight pumps, which are: (a)Statical, such G issler, which exhaust air by the alternate emptying and tilling of a vesselforming the upper part of a barometric column, (b)Dynamic, such as the Sprengel, in which the con-tinuous; falling of a liquid through a tube of uniform. A Ground Plan of the Royal Jubilee Exhibition of Manchester is herewith inserted, and shows the position of Section III. (Chemical and Allied Industries). Space has been allotted to applicants as far as the area available will allow. JamLIS R. 1 mast, J. I \v. h tic i Jol)mercl Q. 1anal} UpHerts R. fOUU Jets w,facto Wiinstr Jolanal .Incher .inchei Wanal £ R 0 far, . »bop GinA GlaG-\ Loi ABtOI Feb. 28,1887.) THE JOURNAL OF THE SOCIETY OF CHEMICAL INDUSTRY. 05 bore and of a length rather greater than the baro-metric column of the liquid produces the exhaustiveeffect. The barometric pumps are generally workedby mercury or water. 2. Momentum or pulsation pumps, such as theJagn pump, which depend on the momentum andpull of an intermittently interrupted column of theliquid used, the action being similar to that of thehydraulic ram used for lifting water by the sud-denly interrupted How of a larger quantity of the ram the water is raised in front by
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
