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<svg width="960" height="900"></svg>


                .links line {
  stroke: #999;
  stroke-opacity: 0.6;

.nodes circle {
  stroke: #fff;
  stroke-width: 1.5px;

text {
  font-family: sans-serif;
  font-size: 10px;



                var nodes = [
    {"id": "Bund des Subventionlosen", "group": 1},
    {"id": "A.Oeri (Conseiller national)", "group": 2},
    {"id": "C.Burckhardt", "group": 3},
    {"id": "M.Huber", "group": 3},
    {"id": "M.Pilet-Golaz", "group": 2},
    {"id": "Ministre de Grande-Bretagne", "group": 4},
    {"id": "R.Marti", "group": 3},
    {"id": "CICR", "group": 3},
    {"id": "Interne CICR", "group": 3},
    {"id": "Consul allemand", "group": 5},
    {"id": "Consul de Grande-Bretagne", "group": 4},
    {"id": "Consulat allemand", "group": 5},
    {"id": "Consulat de Grande-Bretagne", "group": 4},
    {"id": "Consulat des Etats-Unis d'Amériques", "group": 6},
    {"id": "Consulat du Japon", "group": 6},
    {"id": "Consulat italien", "group": 6},
    {"id": "Ministère des Affaires Etrangères allemand", "group": 5},
    {"id": "Ministère des Affaires Etrangères britannique", "group": 4},
    {"id": "Président de la Croix-Rouge allemande", "group": 5},
    {"id": "DIE", "group": 2},
    {"id": "Légation britannique", "group": 4},
    {"id": "Légation allemande", "group": 5},
    {"id": "Légation suisse de Berlin", "group": 2},
    {"id": "Légation suisse de Londres", "group": 2},
    {"id": "Britanniques", "group": 4},
    {"id": "Interne DPF", "group": 2},
    {"id": " Saussure", "group": 2},
    {"id": "Autorités suisses", "group": 2},
    {"id": "DPF", "group": 2},
    {"id": " Pury", "group": 2},
    {"id": "Ministre d'Allemagne", "group": 5},
    {"id": "J.Meylan", "group": 3},
    {"id": "R.Gallopin", "group": 3},
    {"id": "Secrétariat du CICR", "group": 3},
    {"id": "R.Haccius", "group": 3},
    {"id": "Ph.Etter", "group": 7},
    {"id": "Légation suisse de Stockholm", "group": 2},
    {"id": "Source inconnue", "group": 8},
    {"id": "H.Bachmann", "group": 3},
    {"id": "Gouvernements britannique et canadien", "group": 4},
    {"id": " Haller", "group": 7},
    {"id": "Gouvernement britannique", "group": 4},
    {"id": "Demokratische Partei", "group": 1},
    {"id": "Consulat général de Suisse à Bombay", "group": 2},
    {"id": "Consul de Suisse à Toronto", "group": 2},
    {"id": "Consul général d'Allemagne", "group": 5},
    {"id": "Gouvernement allemand", "group": 5},
  {"id": "Conseil Fédéral", "group": 2},
  {"id": "Président du Conseil Fédéral", "group": 2},
  {"id": "Légation des Etats-Unis d'Amériques", "group": 6},

var links = [
{"source": "Bund des Subventionlosen", "target": "Conseil Fédéral", "value": 1},
{"source": "C.Burckhardt", "target": "A.Oeri (Conseiller national)", "value": 1},
{"source": "C.Burckhardt", "target": "M.Huber", "value": 2},
{"source": "C.Burckhardt", "target": "M.Pilet-Golaz", "value": 3},
{"source": "C.Burckhardt", "target": "Ministre de Grande-Bretagne", "value": 2},
{"source": "C.Burckhardt", "target": "R.Marti", "value": 1},
{"source": "CICR", "target": "Interne CICR", "value": 2},
{"source": "CICR", "target": "Consul allemand", "value": 1},
{"source": "CICR", "target": "Consulat de Grande-Bretagne", "value": 1},
{"source": "CICR", "target": "Consulat allemand", "value": 1},
{"source": "CICR", "target": "Consulat des Etats-Unis d'Amériques", "value": 1},
{"source": "CICR", "target": "Consulat du Japon", "value": 1},
{"source": "CICR", "target": "Consulat italien", "value": 1},
{"source": "CICR", "target": "Ministère des Affaires Etrangères allemand", "value": 1},
{"source": "CICR", "target": "Ministère des Affaires Etrangères britannique", "value": 1},
{"source": "CICR", "target": "Président de la Croix-Rouge allemande", "value": 1},
{"source": "Consul de Grande-Bretagne", "target": "C.Burckhardt", "value": 1},
{"source": "Consul de Grande-Bretagne", "target": "CICR", "value": 1},
{"source": "Consul de Grande-Bretagne", "target": "C.Burckhardt", "value": 1},
{"source": "Consul de Grande-Bretagne", "target": "M.Huber", "value": 1},
{"source": "Consul de Suisse à Toronto", "target": "Interne DPF", "value": 1},
{"source": "Consul général d'Allemagne", "target": "C.Burckhardt", "value": 1},
{"source": "Consulat général de Suisse à Bombay", "target": "DIE", "value": 1},
{"source": "Demokratische Partei", "target": "Président du Conseil Fédéral", "value": 1},
{"source": "DIE", "target": "M.Pilet-Golaz", "value": 1},
{"source": "DPF", "target": "Légation britannique", "value": 2},
{"source": "DPF", "target": "Légation allemande", "value": 1},
{"source": "DPF", "target": "Légation suisse de Berlin", "value": 1},
{"source": "DPF", "target": "Légation suisse de Londres", "value": 3},
{"source": "DPF", "target": "M.Pilet-Golaz", "value": 6},
{"source": " Haller", "target": "Britanniques", "value": 1},
  {"source": " Haller", "target": "C.Burckhardt", "value": 4},
  {"source": " Haller", "target": "CICR", "value": 3},
  {"source": " Haller", "target": "Interne DPF", "value": 11},
  {"source": " Haller", "target": " Saussure", "value": 3},
  {"source": " Haller", "target": "M.Huber", "value": 2},
  {"source": " Haller", "target": "M.Pilet-Golaz", "value": 3},
{"source": "Gouvernement allemand", "target": "Légation suisse de Berlin", "value": 1},
  {"source": "Gouvernement britannique", "target": "Autorités suisses", "value": 1},
  {"source": "Gouvernements britannique et canadien", "target": "Gouvernement allemand", "value": 1},
  {"source": "H.Bachmann", "target": " Saussure", "value": 1},
  {"source": "Interne DPF", "target": "M.Pilet-Golaz", "value": 3},
  {"source": " Saussure", "target": "Interne DPF", "value": 1},
  {"source": "Légation allemande", "target":"DPF", "value":1},
{"source": "Légation britannique", "target": "DIE", "value": 1},
{"source": "Légation britannique", "target": "DPF", "value": 2},
{"source": "Légation des Etats-Unis d'Amériques", "target": "DPF", "value": 1},
{"source": "Légation suisse de Berlin", "target": " Pury", "value": 1},
{"source": "Légation suisse de Berlin", "target": "DIE", "value": 1},
  {"source": "Légation suisse de Berlin", "target": "DPF", "value": 1},
  {"source": "Légation suisse de Londres", "target": "DPF", "value": 4},
  {"source": "Légation suisse de Stockholm", "target": "DPF", "value": 1},
{"source": "M.Pilet-Golaz", "target": " Pury", "value": 1},
  {"source": "M.Pilet-Golaz", "target": "Ministre d'Allemagne", "value": 2},
  {"source": "M.Pilet-Golaz", "target": "Ministre de Grande-Bretagne", "value": 2},
  {"source": "M.Pilet-Golaz", "target": "Interne DPF", "value": 1},
{"source": "Ministre de Grande-Bretagne", "target": "M.Pilet-Golaz", "value": 1},
  {"source": "Ph.Etter", "target": "CICR", "value": 2},
  {"source": "Président de la Croix-Rouge allemande", "target": "C.Burckhardt", "value": 1},
 {"source": "R.Haccius", "target": "CICR", "value": 2},
{"source": "R.Marti", "target": "CICR", "value": 1},
{"source": "R.Marti", "target": "J.Meylan", "value": 1},
{"source": "R.Marti", "target": "R.Gallopin", "value": 1},
{"source": "R.Marti", "target": "Secrétariat du CICR", "value": 1},
 {"source": "Source inconnue", "target": "Interne CICR", "value": 1}, 

var svg ="svg"),
    width = +svg.attr("width"),
    height = +svg.attr("height");

var color = d3.scaleOrdinal(d3.schemeCategory10);

var simulation = d3.forceSimulation()
    .force("link", d3.forceLink().id(function(d) { return; }))
    .force("charge", d3.forceManyBody())
    .force("center", d3.forceCenter(width / 2, height / 2));

var link = svg.append("g")
    .attr("class", "links")
.attr("stroke-width", function(d) { return Math.sqrt(d.value); });

var node = svg.append("g")
    .attr("class", "nodes")
      .attr("r", 5)
.attr("fill", function(d) { return color(; })
          .on("start", dragstarted)
          .on("drag", dragged)
          .on("end", dragended));

var labels = node.append("text")
      .text(function(d) {
      .attr('x', 6)
      .attr('y', 3);

      .text(function(d) { return; });

  .on("tick", ticked);


function ticked() {
        .attr("x1", function(d) { return d.source.x; })
        .attr("y1", function(d) { return d.source.y; })
        .attr("x2", function(d) { return; })
        .attr("y2", function(d) { return; });

        .attr("cx", function(d) { return d.x; })
        .attr("cy", function(d) { return d.y; });

function dragstarted(d) {
  if (! simulation.alphaTarget(0.3).restart();
  d.fx = d.x;
  d.fy = d.y;

function dragged(d) {
  d.fx = d3.event.x;
  d.fy = d3.event.y;

function dragended(d) {
  if (! simulation.alphaTarget(0);
  d.fx = null;
  d.fy = null;