1894.J iciili a Fused Electrolyte and a Gaseous Depolariser. (51 



without the porous pot. This arrangement gave the following 

 results. The E.M.F. when short-circuited through a voltmeter 

 (300 ohms) gave 1'4 volt, the chlorine entering rapidly. When 

 short-circuited through 1 ohm, it gave a constant current of 0'6 

 ampere with a P.D. of 0'9 volt. The rather large interior resistance 

 of 1'3 ohm is due not to the electrolyte, but to the greater length of 

 the carbon tube, and bad contacts produced by the corrosive action 

 of the chlorine. No good results were obtained until the chlorine gas 

 bubbled out of the carbon tube, thus realising the conditions before 

 mentioned, as necessary for the production of any large electrical 

 effects. 



Exp. 4. With a view to obtain larger effects, another form of cell was 

 tried, as shown in fig. 5. The carbon pole C consisted of a thin rod of 

 electric light carbon, 5 mm. diameter and 15 cm. long. It was passed 



FIG. 5. 





through a cork fitted in a porcelain tube, 2'5 cm. diameter. A glass 

 tube bent at right angles was passed through the same cork, to serve 

 for the delivery oi the chlorine. The end of the carbon rod was a 

 little short (about 3 mm.) of the end of the porcelain tube. The 

 containing vessel was a Berlin porcelain crucible, 7 cm. diameter. 

 The conductor from the lead was an iron wire, protected from the 

 action of the electrolyte by a surrounding porcelain tube. The electro- 

 lyte was chloride of lead. The whole was arranged as shown in fig. 5, 

 When the chlorine issued from the porcelain tube, the necessary con- 

 itions for depolarisation were in a large degree realised, the contact 

 tween the electrolyte and the carbon being at times almost broken, 



