Chemistry and Physics. 



surface, but is n function of the electromotive force, 

 tube be immersed in mercury, and dilute sulphuric 

 in the tube above the mercury, and a current from : 

 he so passed through the liquids that the mercury f< 

 tive pole, the column will be depressed to an extent 

 the diameter of the tube. In making an electrons 



of mercury by means of a horizontal glass tube t 

 metal, except that it contains a bubble of dilute ac 



in electromotive force equal to T ,-,-,', ,,„ °f ■ 

 capable of decomposing water must lie 

 measured by causing two currents to act against each other. 

 The index bubble is brought to zero by uniting the mercury cups 

 hyawire. The apparatus is very convenient, as it requires no 

 preparation and is extremely simple in its action. He next showed 



\ ~:lnl e 

 ed by Mr. Tisl 



" >m a small onnce into unu 

 iner the mercury and the i 



«>" ni-Tniiiieiit aiTini-oi hv Air, 1 lslev for proilurne. 

 the dropping of mercury from a small orifice into d'i 

 acid ; if the vessels containing the mercury and th 



i manometer suitable for in. isii ng ver\ >1ili t iriat >ns 

 nv. and he illustrated the use of it for proving Laplace's 



1 pressure multiplied 1 



t consists of a U-tube one arm of winch is 

 aoout fifteen inches Ion- and i> bent horizontally and levelled with 

 great care. If the shorter arm be connected with a tube on which 

 a bubble has been blown and the diameter of the bubble be varied, 

 the position of the extremity of the alcohol column will be found 

 to vary in accordance with the above law.— Nature, xv, 210. 



13. EntwicJcelung der theoretischen Ansichten nherilU <jq:»t«rUn 

 ^■li>>yjel,-,rh;ndungen: von Gko. A. Smyth (of Amherst Mass ). 

 12 2 pp. 8vo. Berlin, 1876.— In the ab. 



_ mic bodies, winch mav 

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and* 



i ich 



■-'adds 



. the 



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ftult, Berzelii 



