How to reduce the number of WWW requests?

 private GameObject[] Photos;
     private static int size = Gallery.getSizeImagesPerGallery();
     private WWW www2;
     private WWW www;
     private IEnumerable<String> recebe;
     // Use this for initialization
     void Start ()
     {
         string LinkJsonFile = "...";
         /*www = new WWW(LinkJsonFile);
         yield return www.text;
         if(www.isDone){
             string aux = www.text;
             Debug.Log("Baixou uma imagem -- 1");
 
             TreatmentString(aux);
             ClearWWW(www);
         }*/
 
         StartCoroutine (UpLoadImages(LinkJsonFile));
 
     }
 
     IEnumerator UpLoadImages (string url)
     {
         www = new WWW (url);
         yield return www;
         string aux = www.text;
         TreatmentString(aux);
         //Debug.Log("text" + www.text);
         Debug.Log("Baixou uma imagem -- 1");
         ClearWWW(www);
     }
 
     void TreatmentString (string urlJson)
     {
         string aux = urlJson.Replace ("\\", "");
         PopulateLinksAndTitles(aux);
     }
     public GameObject prefab;
 
     void PopulateLinksAndTitles (string content)
     {
         string aux = "";
         string aux2 = "";
         List<string> LinksImages = new List<string> ();
         List<string> TitlesImages = new List<string> ();
         JSONNode json = JSON.Parse (content);
         Photos = GameObject.FindGameObjectsWithTag("Photos"); 
         for (int i = 0; i < size; i++) {
             aux = json ["content"] ["videos"] [i] ["image_url"].Value;
             www2 = new WWW(aux);
             aux2 = json ["content"] ["videos"] [i] ["title"].Value;
 
             Photos = GameObject.FindGameObjectsWithTag("Photos");
 
             StartCoroutine (CarriesThumbs (aux, aux2, www2,Photos[i]));
         }
 
     }
 
     IEnumerator CarriesThumbs (string url, string TitleImage, WWW www2,GameObject Photo)
     {
 
             www2.threadPriority = ThreadPriority.High;
             yield return www2;
             Debug.Log("Baixou uma imagem -- 2");
             Photo.name = TitleImage;
             Photo.GetComponent<MeshRenderer>().material.name = url;
             MeshRenderer render = Photo.GetComponent<MeshRenderer> ();
             Texture2D texture = www2.texture;
             render.material.mainTexture = texture;
             if (www2 == null) {
                 Debug.LogError ("Failed to get the payload.");
             }
             if (www2.error != null) {
                 Debug.LogError ("Error occurred during download " + www2.error);
             }
 
             ClearWWW(www2);
     }
 
     public void ClearWWW (WWW www)
     {
         if (www != null) {
             www.Dispose();
             www = null;
             System.GC.Collect();
         }
     }

I step to the WWW a URL that contains a json file and this file contains 60 urls images.

But when I call the method updateImage I have 13 calls to www.

And after the call of the other methods, there are 430 requests. But I need a request to get the text from the remote json file and another 60 requests for each image.

How can I handle this problem?

Because the occurrence of escessivas requests I get the following errors:

Error occurred during download Recv failure: Connection was reset

You are trying to load data from a www stream which had the following error when downloading. Recv failure: Connection was reset