The thumb or finger tips will leave an imprint upon glass, polished metal or wood, owing to the moisture and natural oil oozing from the cuticle. It is a simple matter to procure such imprints when wanted, and they can be turned over to the authorities for identification of a suspect. SECURE PRINTS OF ALL CRIMINALS. If peace officers throughout the country would secure finger prints of all criminals passing through their hands and forward them to a central bureau it would facilitate the apprehension and identification of malefactors. As a preventive of repeating at elections, the finger print identification would serve an admirable purpose. When an elector registered he could leave an imprint of his fingers upon the registration book, and when he went to vote a glance at the registration list and comparison of the imprint made at the polls would readily establish his identity if the prints tallied. The natives of India decline to recognize the validity of any document beneath the signature of which is not imprinted a reproduction of the whorls or loops of the thumb of the signer, alleging that a person might deny his own signature, but that the finger prints afford incontrovertible evidence, as no two people can make the same impression with their thumbs upon paper. Upon opening an account with a bank in India the depositor leaves the impress of his right thumb upon the roll of depositors and none of his paper will be honored unless checks are thus imprinted. In the same country pensioners are compelled to imprint their thumbs upon receipts for pension money, and thus obviate the likelihood of other persons drawing the stipend rightfully belonging to the veteran. The best test of a system is its practical use and the results derived, and one of the most important matters is uniformity in all branches of work, classification, filing, size of cards, etc., so that, as the system becomes universal, it will be operated on identical lines in all countries. From my observation of the practical workings of the system, I believe that at New Scotland Yard, London, to be the best. FINGER PRINT SYSTEM FURNISHES COMPLETE IDENTIFICATION. In Paris a public house or saloon was broken into one morning, and it was found that the owner had been murdered and that apparently there was no clew to the murderer. On arriving at the saloon they found a table on which drinks had been served, and on which were found a number of glasses. On close investigation finger prints were discovered on each. Finger prints were also found on a knife by the side of the body and on a decanter. On comparison it was found that the prints were made by the same person. On causing the arrest of the different people who had been seen to visit the saloon they were finger-printed and a comparison made, with the result that the murderer was arrested and a confession obtained within ten days, followed by conviction.