Tim, This came up today in the Pinheads, from Christopher Gray. I thought you would be in the best position to answer the question. You may want to answer him privately and directly, or via [log in to unmask] (mailto:[log in to unmask]) for all to see. Ralph The upper floors of the Woolworth Building present an extreme patchwork appearance: the original cream colored terra cotta, mixed with frequent (1 in 10?) replacement patches in a medium gray, which looks like concrete (cement!!). What were these patches, and why have they changed color so dramatically? Or were they installed in that shade? Christopher ************************************** See what's free at http://www.aol.com. -- To terminate puerile preservation prattling among pals and the uncoffee-ed, or to change your settings, go to: <http://listserv.icors.org/archives/bullamanka-pinheads.html>