264 SEC. 10. ELECTRICITY. 



1268. Replenisher. Designed by Sir W. Thomson for re- 

 storing electricity to the Leyden jar of his quadrant electrometer. 



Elliott Brothers. 



A small charge being given to the Leyden jar, the replenisher increases or 

 decreases the difference of potentials between the two coatings of the jar by a 

 constant per-centage per half turn. 



1269. Grove's Nitric Acid Battery. Elliott Brothers. 



1270. Faure's Nitric Acid Battery. Elliott Brothers. 



The advantages offered in this battery are, greater constancy, less incon - 

 venience from fumes, the porous cell being a stoppered bottle, and the zincs 

 used need not be amalgamated, common salt bsiiig used in the outer cell. 



1271. Glass Battery Cell, with two carbon and two zinc 

 plates. Keiser and Schmidt, Berlin. 



1272. Glass Battery Cell, with two carbon and two zinc 

 plates. Keiser and Schmidt, Berlin. 



1273. Glass Battery Cell, with one carbon pole and one zinc 

 plate. Keiser and Schmidt, Berlin. 



1274. Dipping-Battery, with 10 elements, same construction. 



Keiser and Schmidt, Berlin. 



1275. Dipping-Battery, with 16 elements, with pachydrope 

 of the exhibitors' own construction. Keiser and Schmidt, Berlin. 



1276. Battery for Field Telegraph Service, constructed 

 for the Prussian Railway Battalion according to the plan of 

 Captain Witte. Keiser and Schmidt, Berlin. 



1277. Leclanche Cell, for working house telegraphs, modified 

 by the makers. Keiser and Schmidt, Berlin. 



1278. Drawing and Description of a Galvanic Battery, 



with arrangement for combining the elements ad libitum. 



Dr. Tasche, Giessen. 



1279. Portable Battery for Electro-therapeutic Pur- 

 poses. 24 elements. Prof. Beetz, Munich. 



1279a. A Bound Immersion Battery, with automatic break 

 for medical purposes. J. Teller, Munchen. 



By this arrangement powerful action is obtained, and a very constant current, 

 even with great resistance. The consumption of zinc is (in consequence 

 of self-amalgamation in the acid chromate of mercury-oxide solution) very 

 small, and this result is also favoured by the small immersion, which is 

 limited by the slide on the upright bars. By the automatic interrupter, the 

 battery can be used also with intermittent current, and such a battery current 

 is to be preferred to the action of an induction current (because without 

 alteration of poles). 



