Transaclions Society Naval Aniiilrcls and Marine EujiiHccrs, Vol.20, ,gi2. pi^i^ g 



To illuslralc paper on "Mamie Lighting Equipment for the Panama CanaW 



hy James Patfison, Esq. 



A-600 A W-300 



Types of Accumulators. 



A-50 A-25 



