912 



Voltaic Electricity. Section 4: Ohm's, Kirchhoff's and Joule's Laws. 



No. 61837 - 



61 839. 1 : 9. 



61843. I: 10. 



61 837. 1 : 5. 







61 841. 1 : 0. 



. 



..... ..Mt *..... 



61 843. 1 : 4. 



61 846. 1 : 6. 



61.837. Rheostat after Whcatstone (M. P., 10' h Edn., IV, 1, Figs. 343 a and b; 9 th Edn., 

 Ill, Pigs. 361 and 362), Figu re, with 1 slate cylinder 160 mm long. The resist mice 

 corresponding to one turn should be quoted 



61.838. - - i d e m, with 1 cylinder 250 mm long 



61.839. Rheochord after Poggendorff, Figu r e (M. P., 9 th Edn., Ill, Fig. 364), with 2 pla- 

 t ilium wires 1 m long and mercury contact vessel 



61.840. Rheochord, Figure, simple, with sliding contact, measuring wire 500 nun long 



61.841. 4 Resistance Spirals of thick Manganin Wire, F i g n re. after Friedr. C. G. Miiller 

 (M. T. Fig. 194) one. each of 1, 0.5, 0.2 and 0.1 ohm 



61.842. Resistance of 0.01 ohm, for Shunt Experiments, after Friedr. ('. G. Miiller (M. T. 

 Fig. 1!5) 



61.843. 3 Resistance Spirals, after I-Yiedr. C. G. Miiller, Figure (M. T. Fig. 191), of copper, 

 German silver and manganin, of equal length and cross section, for demonstrating 

 temperature coefficient 



61.844. Device for explaining that the conducting resistance of a metallic conductor depends 

 upon the temperature; with platinum wire (\Y. I). Fig. 514 [487J) 



61.845. Device for the same Purpose, for liquids (W. D. Fig. 515 [488]) 



(]. 24 II-.'. 21110, 

 4 133, 4809, 



s. il. 



3. 0. 



3. 6. 



4. 0. 



' 1. 10. 



0. 16. 



1. 0. 



0. 0. 



n. 4. 

 0. 1.0 



24(53, 

 2474. 



