$(document).ready(function(){
$('select[name=selectOne]').change(function(){
    experiment_id = $(this).val();
    request_url = '/admin/get_measurements/' + experiment_id + '/';
    $.ajax({
        url: request_url,
        success: function(data){
            $.each(data, function(key, value){

                $('select[name=measurement_a]').append("<option value='" + value + "'>" + value +</option>");

            });
        },
        return: false
})
})
});