266 SEC. 10. ELECTRICITY. 



1289. Single-cell Apparatus, for examining the thermo- 

 electric properties of liquids. George Gore, F.R.S. 



(See Proceedings of the Royal Society, 1871.) 



1290. Large Single-cell Apparatus, with platinum-plates, 

 for showing the thermo-electric properties of liquids. 



George Gore, F.R.S. 



1291. Pour-cell Apparatus, with copper plates, for showing 

 the thermo-electric properties of liquids. George Gore, F.R.S. 



(See Philosophical Magazine, 1857.) 



1292. Twelve-cell Apparatus, with platinum-wire elec- 

 trodes, for examining the thermo-electric properties of liquids. 



George Gore, F.R.S. 

 (See Proceedings of the Royal Society, 1871.) 



1293. Model of the most improved form of apparatus for 

 investigating the thermo-electric properties of liquids. Used with 

 ribbons of platinum, gold, palladium, and silver. 



George Gore, F.R.S. 



1294. Thermo-Electric Battery or Clamond Pile. 



Thermo- Electric Company. 



The poles or generators are constructed of zinc and antimony, both being 

 metals bearing great electrical properties. The electricity is given out with- 

 out any intermediate agency, except heat, which is generated as gas ; coke 

 or charcoal is consumed. Economy in maintenance, and cleanliness in ap- 

 plication, gives this arrangement an advantage over other batteries, and the 

 current obtained is constant and free from polarization or exhaustion. 



1297. Thermo-Battery. Siemens and Halske, Berlin. 



1297a. Thermo-Electric Pile, small student's form, nickel- 

 plated. Harvey, Reynolds, and Co. 



1298. Thermo-electric Pile (Noe's arrangement). 



P. Dorffel, Berlin. 



The elements, consisting of a round rod (positive) and thin wires" (nega- 

 tive), are arranged in two opposite rows of 64 elements each, whose heating 

 bars (cast of positive metal and protected against the flame by copper casing) 

 project in a row into the open space between the elements, so that they^are 

 all alike heated by the stand of Bunsen burners below, and convey the currents 

 to the elements. The cooling of the other junctions is effected by means of 

 metallic cool-plates attached to them, supported by the wooden frame under 

 the elements. The electro-motive force is equal to 6 Bunsen or 120 Jacobi- 

 Siemens units. The resistance = 2 '45 Siemens units. 



1298a. Nobili's First Thermo-Electric Battery. 



Prof. Dove, Berlin. 



1298b. Melloni's First Thermo-Electric File. 



Prof. Dove, Berlin. 



