CHAPTER V

GREAT INVENTIONS OF THE NINETEENTH CENTURY

Electric batteries.--The dry battery.--The storage battery.--The dynamo.--Siemens' dynamo.--The drum armature.--Edison's compound-wound dynamo.--Electric power.--The first electric railway.--Electric lighting.--The telegraph.--Duplex telegraphy.--The telephone.--The phonograph.--Gas-engines.--The steam locomotive.--How a locomotive works.--The turbine