1. Abolish the use of any wood in the binding processes. 2. Recommend the bookbinder to use glue mixed with alum in place of paste. 3. Brush all worm-eaten wood in the repositories of books with oil or lac varnish. 4. Preserve books bound in calf by brushing over with thin lac varnish. 5. No book to lie flat. 6. Papers, letters, documents, &c., may be preserved in drawers without any danger provided the wafers are cut out and that no paste, &c., is between them. 7. The bookbinder is not to use any woollen cloth, and to wax the thread. 8. Air and dust the books often. 9. Use laths separated one from the other one inch in place of shelves. 10. Brush over the insides of bookcases and the laths with lac varnish. Dr. Hermann cannot at any rate be charged with any such sentimental regard for "vermin" as that which influenced Mr. Day, a well-known book hunter of the earlier part of the present century. One day, upon removing some books at the chambers of Sir William Jones, a large spider dropped upon the floor, upon which Sir William, with some warmth, said, "Kill that spider, Day! Kill that spider!" "No," said Mr. Day, with that coolness for which he was so conspicuous, "I will not kill that spider, Jones; I do not know that I have a right to do so. Suppose, when you are going in your carriage to Westminster Hall, a superior being, who perhaps may have as much power over you as you have over this insect, should say to his companion, 'Kill that lawyer! Kill that lawyer!' How should you like that? I am sure to most people a lawyer is a more noxious insect than a spider." The simplest protection yet discovered against book worms is a liberal use of common snuff, which should be sprinkled all over the shelves, the process being repeated every three or four months. This is almost infallible, and probably quite as effectual as Dr. Hermann's ten preventives rolled into one. There is no magic in the art of preserving books--the great art is to be able to get them, and to know what to buy and how much to give for them. This acquired, the rest will come easily enough. The contents of a whole treatise on the custody and preservation of books might be very accurately and succinctly summed up in a few lines. Keep out damp, let the shelves be lined if possible with good leather, and last, but by no means least, look at the insides of your books as well as at the outsides.