function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Augustin Bernardi Buchha ̈ ndler', 291],
    ['Berlinisches Magazin', 51],
    ['Der Verfasser', 22],
    ['Io. Frid. Gleditsch', 5],
    ['Ioannis Thomae Trattner', 23],
    ['J. Murray', 7],
    ['L. Salvii', 55],
    ['Laurentii Salvii', 89],
    ['Mich. Friedr. Bartsch', 13],
    ['Nic. Th. Gravius', 22],
    ['Officina Libraria Kortii', 47],
    ['Sammlung europäischer Schmetterlinge', 366],
    ['Schwickert', 4],
    ['Transactions and proceedings of the New Zealand Institute', 7],
    ['Wolfgang Walthers', 27],
    ['Other (32)', 52]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=1081)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);