diff --git a/js/browseMgr_5.1.js b/js/browseMgr_5.1.js
index b7cc71c..96984eb 100644
--- a/js/browseMgr_5.1.js
+++ b/js/browseMgr_5.1.js
@@ -2093,8 +2093,9 @@ $(document).ready(function() {
 		var ultimaFormaCanto;
 		let numeroPeriodo = 1;
 		showingComments = false;
-
-		formecantica.map(function(item) {
+		let initmap=850*(parseInt(canto)-1)
+		var subformecantica=formecantica.slice(initmap)
+		subformecantica.map(function(item) {
 			formaItem = item.split("_");
 			var sentenceid = idcantica + "_" + formaItem[1] + "_s_" + formaItem[5]
 			if (formaItem[1] == canto) {