How to apply effects to only newly appended nodes (jQuery)

I am loading in html via AJAX and appending it to a DIV but I want to be able to select the newly loaded in html and apply a hide().fadeIn() to elements in that newly appended html.

Current function looks something like this

wall = new Object();

wall.showWall = function (options) {
    // Use this to initiate the comment wall
    $.ajax({
        url: "activity_results.html?"+options,
        cache: false,
        success: function(html){
            $("#comments .loader").hide(); // The wall's comment spinner
            requestStuff.showRes开发者_如何学运维ponse(); // Trigger the addComment function
            if (!options){ // Make sure we are not paging
                wall.showMore();
            }
            $("#comments").append(html).hide().fadeIn("slow");
        }
    });

}

When new html gets loaded into #comments I want to be able to only fade in those nodes.

Instead of appending to #comments create a hidden div inside of it and append it to that div.

Then fadeIn that hidden div.

$(html).appendTo("#comments").hide().fadeIn("slow");