but recently and restoration experts found the 16th century volume by nicholas copernicus. it is one of 118,000 books pulled from the fire that damaged the library. 10 years later, many of the damaged works have made their way back to library shelves. >> over 36,000 books have been restored. several thousand charred books have been saved as well as many damaged by soot. 80% of the damaged volumes are back on display. completethe destruction of over 50,000 original works is a painful loss, the fire helped raise awareness about how fragile collections like these are. this exhibit informs visitors the progress restoration experts are making. they have developed a new technique that helps cut the time needed to reserve damaged pages. after a competition treatment, they are applied to thin sheets of -- pages are applied to thin sheets of paper. >> on average, we managed to restore 300 to 350 pages per workday. will take rate, it another 10 years before all the damaged books can be restored. >> that wraps up this edition of "the journal." thanks for joining us. tune in again at t