A review of the various processes for treatment of paper in pulp or when finished, demonstrates that time, money and study has been devoted to the production of a REAL safety paper. Some compositions and processes have in a measure been successful. It is found, however, that the ingenuity of those evil-minded persons, to the detection of whose efforts to alter the writing in documents this class of invention has more particularly been directed, finds a ready way of removing in some cases the evidence which the chemical reagent furnishes. This being true most of them have become obsolete, having entirely failed to accomplish the purposes for which they were invented. There are but three so-called safety papers now on the market, if we exclude those possessing printed designs in fugitive colors. It is a strange anomaly, nevertheless it is true, that 90 per cent or more of the "raised" checks, notes, or other monetary instruments which were in their original condition written on ordinary or so-called safety paper, never could have been successfully "put through" but for the gross and at times criminal negligence of their writers by the failure to adopt precautions of the very simplest kinds, and thereby avoided placing temptation in the way of many who under other circumstances would never have thought of becoming forgers. There is no safety paper, safety ink, or mechanical appliance which will prevent the insertion of words or figures before other words or figures if a blank space be left where the forger can place them. CHAPTER XXXII. CURIOSA (INK AND OTHER WRITING MATERIALS).