chart.addSeries(seriesData);
seriesData = new XYSeries("London");
seriesData.setSeriesPoints(getPoints(seriesData, 48.9, 38.8, 39.3,
41.4, 47.0, 48.3, 59.0, 59.6, 52.4, 65.2, 59.3, 51.2));
chart.addSeries(seriesData);
seriesData = new XYSeries("Berlin");
seriesData.setSeriesPoints(getPoints(seriesData, 42.4, 33.2, 34.5,
39.7, 52.6, 75.5, 57.4, 60.4, 47.6, 39.1, 46.8, 51.1));
chart.addSeries(seriesData);