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"Grease or wax spots," says Hannett, in "Bibliopegia," "may be removed by washing the part with ether, chloroform, or benzine, and placing it between pieces of white blotting paper, then pass a hot iron over it." "Chlorine water," says the same writer, removes ink stains, and bleaches the paper at the same time. Of chloride of lime, "a piece the size of a nut" (a cocoa nut or a hazel nut?) in a pint of water, may be applied with a camel's hair pencil, and plenty of patience. To polish old bindings, "take the yolk of an egg, beat it up with a fork, apply it with a sponge, having first cleaned the leather with a dry flannel." The following, says a writer in "Notes and Queries," with perfect truth, is "an easier if not a better method; purchase some bookbinder's varnish," and use it as you did the rudimentary omelette of the former recipe. Vellum covers may be cleaned with soap and water, or in bad cases by a weak solution of salts of lemon.

Lastly, the collector should acquire such books as Lowndes's "Bibliography," Brunet's "Manuel," and as many priced catalogues as he can secure. The catalogues of Mr. Quaritch, Mr. Bohn, M. Fontaine, M.M. Morgand et Fatout, are excellent guides to a knowledge of the market value of books. Other special works, as Renouard's for Aldines, Willems's for Elzevirs, and Cohen's for French