1062 



Section 12: Thermo-electricity. Miscellanea. 



No. 63416 



63417. 1 : 5! 



52 069. 1 : .-,. 



63416. 1:2. 



63 418. 1 : 2. 



63419. 1:3. 



63420. 1:8. 



52,069. Rotating Thermocouple for the Whirling Table, Figure, cylindrical pattern, of * 



iron and German silver, with spring contacts sliding on the cylinder 0. !.">.<> 



On rotating, heating in the cylinder takes place by the friction of the spring, the friction causing 

 a current, which flows from iron to German silver or vice-versa according to the position of the spring. 



63.416. Needle-shaped Thermocouple, Figure (M. P., 9 lh Edn., Ill, Fig. 825), for intro- 

 ducing into plant and animal tissues 0. 10. 



63.417. Thermocouple, F i g u r e, after Friedr. C. G. Miiller (M. T., Fig. 234), of iron and 

 constantan 0. 8. 



63.418. Thermo-cell, F i g u r e, after Friedr. C. G. Muller (M. T., Fig. 233) 0. 1. 8 



63.419. Thermo-pile after Melloni, Figure, Demonstration Model, with three bismuth- 

 antimony cells on stand, with two terminals 0.18.0 



63.420. Apparatus for Determining Temperature with Thermocouple, Figure (\V. u. E. 



phys. I'rakt., 4 th Edn., Fig. 327), with adjustable stand, L> baths and 2 thermometers L'. 10. 



The thermocouples consist of an approx. 3 mm thick German silver wire which at a and \> resper- 

 tively is soldered to a copper wire of same thickness; glass tubes are slipped over the vertical ends 

 of these copper wires at a and b and reach to the junctions. The junctions themselves are immersed 

 in reagent glasses Tilled with paraffin oil or petroleum. The sheet iron vessels are filled with water and 

 are provided with thermometers. 



Cl. 3883, 



Thermo-piles for Charging Accumulators: see p. s.v.i 680.3006,4522, 



Thermo-piles for Shewing Thermal Differences: see Section "Heat". 2098, 3097. 



