Handbook for the physiological laboratory / by E. Klein [and others] ; edited by J. Burdon-Sanderson.

Date:
1873
Catalogue details

Licence: In copyright

Credit: Handbook for the physiological laboratory / by E. Klein [and others] ; edited by J. Burdon-Sanderson. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

    257/270 (page 253)
    Fig. 334.—Screw-press. The substauce from which the fluid is to be expressed is wrapped iu strong flaunel or calico, and the liquid wliich oozes out is collected as it runs from the small spout. FIG. 335.—Bunseu's water air-pump. This consists of a ■wide glass-tube a, into which another tube b.b'.b, passes air-tight. 0, is an india-rubber tube connecting a with the water supply, d, is a clamp to stop the flow of water through c. e, is anotlier clamp to regulate the flow. /, is a reservoir to prevent any water which may accidentjilly come over from getting into J. a. is a plug to let out any water from /. h, is a screw for connecting a air-tight to a piece of tut>ing, which should luiss 32 feet, if possible, below the level of a. I, is a piece of strong india-njbber tubing to connect the air-pump with./, the bell-jar, to be exhausted. Tlie water rushes in at c and dowij ft, carrying bubl)les of air with it, as shown ■ipi)osite n, till the e.vhaus- tion is complete, a is represented as half full of water. A, a funnel tlxed air-tight iu the india-rublier stopper of.;. I a small cone of platinum foil to prevent the filter from being broken, m, a plate of ground glass, n. a beaker to receive the filtr.ate. N, a m.anometerto measure the degree of exliaustion. 0, a piece of platinum foil of the proper size and shape to n.ake the cone, (. s, a mould, and ( a stamp, to give the proper shape to the cone, I. p. is a cone of porous earthenware used as a funnel. is a piece of wide india-nibber tubing stretched o^-e^ the funnel r. and holding the cone 2^ air-tight. r. is a funnel inserted into the stopper of a bell-jar. The bell-jar may either be e.xh.austed by n.eans of a tube in the stopper like / or bv a tubulaturo in the side, as is supposed to be tlie case wjtli that linlding r. Fir,. 336 It may also be used to keep li(|uidsattho - ■' i„t,1„rin-filtration 'bystibstitu'tingicetorhotw.atcr. There are two kinds of those funnels. One of reez.ngpon t d m» filt'^^^^^^^^ is closed by a cork through which the tube them has suMpl ;™„ °,s„ funnel which contains the filter is thus in direct contact with the warn, water ,.r of aghvssfunuel p.isse.s^^^^^^^^^ ^^^^ other form h.us a copper funnel in the situation of the dotted line ice with winch the , j, therefore only in<lirectly surrounded by the water or ice and in this ^^'^^^^^ '^^^^^^^^^^ therefore not be so exactly regulated, but it can be remove.l with great „n the '^W^^^''';;; , ,; .e whid. isnot thecase when the other fonn isomployed. facility an.Uuwaheymtj^ ^^^^^ ,„,„er figure shows the dialyzer with the parchment paper stretched ov^r it.^^The lower shows it in use Moating on water.