This method was gradually refined by improved timing and the use of a measured distance marked on the rail, until finally it gave at once a rate in leagues or miles an hour.
Le indlela yaphawula kukuphucuka kwamaxesha nokusetyenziswa kokulinganiswa umgama ophawulwayo kwindlela de kubesekugqibeleni enika isantya kumanyano okanye kwiyure yemayile.