setTimeout(function(){

    jQuery(function(){

        if(jQuery(".pagination").is(":visible")){

            jQuery("th:nth-child(2)").after("<th>Descrizione</th>");

            jQuery("td:nth-child(2)").each(function(){
                var reference = jQuery(this).text();

                jQuery.ajax({
                    type: "POST",
                    url: "MIOURL",
                    data: "reference=" + reference,
                    dataType: "html",
                    success: function(msg){
                        jQuery(this).after("<td>"+msg+"</td>");
                    },
                    error: function(){
                        console.log("Chiamata fallita, si prega di riprovare...");
                    }
                });
            });
        }
    });
    }, 4000);
}, 4000);