json to backbone model for load config-Collection of common programming errors

I want to set configs in Model with $.get() :

    var config= Backbone.Model;
    var c = new config();
    $.get("config.json", function(data){
            c.set(data);
    });
    console.log(c.get('glossary'));

Return Undefined, but console.log(c) return the good Backbone Model.

Content of JSON file is the example : http://www.json.org/example.html

Thanks

Originally posted 2013-11-09 23:30:09.