set marker from json

gistfile1.txt

    $.getJSON('media/js/markers.json', function(data){
        $.each(data.markers, function(i, marker){
            map.addMarker({
                id: i,
                tags: marker.tag,
                lat: marker.latitude,
                lng: marker.longitude,
                infoWindow: {
                    content: '<h2>' + marker.name + '</h2><p>' + marker.address + '</p>'
                }
            });
        });
    });

json is:
{"markers":[ {
"id": "1",
"tag": "bar",
"latitude":51.527145976089415,
"longitude": -0.08147038015136054,
"name":"Meat Mission",
"address":"Hoxton Square"
}, {
"id": "2",
"tag": "foo",
"latitude":51.53144023349466,
"longitude":-0.0802026567871561,
"name":"Troy",
"address":"Hoxton St"
} ]
}