14,311. Benitez, C. F. Oct. 9. [Addition to 17,811/14.] Systems of charging and discharging galvanic batteries; supplying by arrangements of condensers and transformers; systems of charging and discharging condensers.-Batteries of accumulators are arranged in two sets, and one set, consisting of the parts 1, 2 being charged and arranged in series, is used to charge the second set consisting of the parts 3, 4 arranged in parallel or series-parallel. The charging-circuit contains the primaries 15, 27 of two transformers having condensers 14, 22 connected as shown, with a view to augmenting the charging-current, so that when the second set is fully charged by arranging its parts in series and the set 1, 2 in parallel, the second set will be used to charge the first, augmentation being again obtained. The effect obtained from the condensers and transformers is described in the parent Specification and in Specification 5591/15. A trembler may replace the spark-gap 23.