942 



Voltaic Electricity. Section 5: Electrochemistry. 



NIL <!_' I'M 



a, a. 



62 193. 1 : 7. 



62 196. 1 : 10. 62 197. 1 : 10. 



62 198. 1 : 5. 



62200. 1 : 10. 



62.193. Voltameter after Hofmann, Figure, with platinum electrodes, with two glass d. 

 tubes of 75 ccm, divided in 1 / 6 ccm 1. 12. 



62.194. - - idem, with carbon electrodes 1. 10. 



62.195. --idem, modified by Friedr. C. G. Miiller (M. T. Fig. 202) 1. 4.0 



62.196. Voltameter after Hofmann, improved by Kolbe, Figure (Kolbe-Skellon, Intro- 

 duction to Electricity, Part II, Fig. 134 B ; Ztschr. f . d. phys. u. chem. U. 14, 1901, 



p. 77), with platinum electrodes 7x40x0.3 mm 2. 15. o 



62.197. Gas Voltameter after Kolbe, Figure (Kolbe-Skellon, Introduction to Electricity, 

 Part II, Fig. 134 A; Ztschr. f. d. phys. u. chem. U. 10, 1897, p. 75), for quantitative 

 experiments, with platinum electrodes 7x40x0.3 mm 2.10.0 



62.198. Voltameter after Kohlrausch, Figure (M. P., 10"' Edn., IV, 1, Fig. 463; 9 th Edn., 

 Ill, Fig. 343), with thermometer fused in and with large platinum electrodes, can be 



used up to 30 amps 3. IL'. t> 



This voltameter is very well adapted for quickly checking ammeters. To fill it is only neressai \ 

 to invert it. The bung should be removed when in use. 



62.199. Voltameter after Friedr. C. G. Miiller, in glass jar for water cooling (M. T. Fig. 201) 0. 12. ti 



62.200. Precision Gas Voltameter after Friedr. C. G. Miiller, F i g u r e (Ztschr. f. d. phys. 

 u. chem. U. 14, 1901, p. 140; M.T. p. 288), for quickly and conveniently calibrating 

 ammeters, also well adapted for practical school work. The apparatus can remain per- 

 manently filled ready for use 2. s. o 



62.201. Water Decomposing Apparatus for laryc quantities of oxyiren and hydrogen, F i g u r e, 



for potentials of 820 volts (M. P., 9 th Edn., Ill, Fig. 449) . 3. 0. 



62.202. Voltameter after (Jrimsehl, for catching separated gases; is inverted for filling; also 

 suitable for practical school use (Ztschr. f. d. phys. u. chem. I'. 18. l'.'o:>, p. 2s:; 



Figs. 1 and la; Grimselil, Fig. 852) ' 0. 16.0 



62.203. Gas Voltameter after Grimselil, for trapping the gases in general; of low resistance. 

 rapidly decomposing with 3 4 volts (Ztschr. f. d. phys. u. chem. I". 18, 1905, p. 2SI. 



Figs. 2 and I' a) ' 0. 10. o 



Six of these apparatus can be used for demonstrating Faraday's first law (<(. < 'liinsfhl. Fi.n. 850). 



Cl. 5959, 3482, 3481. 2304, 5380. 



