Lippincott's Magazine of Popular Literature and Science, page 169 by Various Authors
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f years old, apparently just as perfect in texture as when first placed upon the shelves of the original owner. The parchment was often worn through at the angles, but there was no breakage from shrinking, the material having been shrunken as much as possible when prepared from the skin. At Harvard College I examined an embossed calf binding stretched on wooden sides which was above a hundred years old. It was in almost perfect preservation, and not much shrunken. This volume, being very large, was on a shelf next the ground floor--a position which it had probably held ever since the erection of the building.
"Professor Nichols does not mention morocco in his tables of analyses. Indeed, morocco was so little used for bookbindings until within about thirty years that it affords a less ample field for investigation than any other of the leathers now in common use. My attention was therefore directed specially to this material, of which I found some specimens having a record of nearly fifty years. My observation was, that in all the libraries these were less affected by decay, in proportion to their age, than other leathers. In Harvard College Library the best Turkey morocco, with forty years of exposure, showed no injury except from chafing. The outer integument was often worn away, exposing the texture of the skin, which was still of strong fibre. In the Athenæum, on the contrary, many of the moroccos showed the same decay as the calf, russia and sheep. There was, however, a wide difference in the condition of moroccos of the same age--some showing as much decay as the calf, while others had scarcely any of the disintegration common to the older calf bindings. The same might, indeed, be said of all leathers, those tanned by the quick modern methods, with much more acid than is used in old processes, in which time is a large factor, showing always a more rapid deterioration. But, the methods being the same, morocco, the oiliest of the common leathers and the one having the firmest cuticle, endures the