Answer: 

Recalls provide a way for you to access books that are currently checked out to other individuals at Cornell. Recalling shifts the due date of items forward (recalled items become due in 10-14 days). It also puts you in the queue for the item so that you will be contacted by email when it is returned (provided you are the first person in the queue). Note: if you wish to be added to the queue for a book but don't wish to shift the due date forward, you may place a hold instead of a recall.

To place a Recall, find the item in the catalog and click the red "Request Item" button.