On July 17, 1884, experiments were made in the garden of Mr. Bernard Quaritch, the eminent book-seller, with fire-proof cases devised by Mr. Zaehnsdorf, equally distinguished as a binder, and were reported in the Academy of July 26. Three books, each enclosed in a separate case, were put into a fire, and kept there for half-an-hour. On their being extracted, "one, which had been in a case lined with tin, unpierced with air-holes, suffered only in its binding, which had been slightly damaged, not directly by the fire, but only by the heated metal. A second, of which the case was of the usual kind, but also unpierced with air-holes, came out intact. The third, in a case resembling that of the second, but pierced with air-holes of good diameter, suffered most, the fire, and the water by which the fire was extinguished, having both found admission through those punctures, the water being the more deleterious agent of the two. This book was, however, not materially injured. From this experiment it may be concluded that a good case will in almost all instances preserve a book from destruction by fire, that a metal lining to the case is not necessary, and that the air-holes (which experiments of a different kind have proved to be indispensable) should be small and numerous, distributed over the top and front edges, and not only on the top."
In 1894, the chief part of the library of Lord Carysfort at Elton Hall, Peterborough, was destroyed by fire, these books only escaping which had been protected by Mr. Zaehnsdorf's cases. On
