var s = [];
for ( var i = 1; i < 1000; i += 1 ) {

  s.push( Math.pow( 10, -i / 100 ) );
  s.push( 2 * Math.pow( 10, ( -i / 1000 ) ) );
}

var graphinstance = new Graph( domGraph, {}, {

  bottom: [ {
    logScale: true
  } ],

} );

graphinstance.newSerie( "logscale" )
  .setLabel( "My serie" )
  .autoAxis()
  .setData( s )
  .setLineColor( 'red' );

graphinstance.redraw();
graphinstance.drawSeries();