May 6 D.C. 41 deteriorate at much lesser rate. For adhesive, teeth labels, etc., they use Ambroid ( " banana oil" compound) which, altho poisonous, is better than glue, and does not wrinkle paper as does any watery solution. Their systematic catalog of the mammals of the world is very complete - kept up to date since first edition of Treussart in 1898 - bibliography by author, specific & generic names. Their copy of Treussart is kept up to 1898 by annotations. I am saving samples of their cards, which are large, 6x8" I think, so as to take full lines of typewriting. They copy copiously, but do not believe in cutting & pasting separate as does the B.S.