As to the physical necessities in registering finger prints, they are simple and inexpensive. A block of wood faced with smooth tin or zinc the size of an octavo volume, a small ink roller, and a tube of black ink are all that is required. For removing the ink on the thumb or finger a towel and alcohol cleanser are sufficient. A tip impression or a "rolled" finger signature may be used. Only a few seconds are required for the operation. [Illustration: The Bertillon System of Identification Instruments used in the measurement of criminals by the Bertillon system of measurements.] OBJECTS TO HAVING FINGER IMPRESSIONS RECORDED. In one of our prisons recently, a man who had just been sentenced was brought up, and while he made no opposition to being measured by the Bertillon system, he objected strongly to having his finger impressions recorded. This caused the identification expert to be suspicious, and he submitted a duplicate record to the Scotland Yard police, in London, with the result that the man was at once identified as a murderer who had escaped from a prison in England, and was taken back there. When confronted with the English record, the convict at once admitted his identity. An express company lost a large sum of money which was being sent from one point to another in a sealed package. During transmission the seals were broken, the money abstracted and the package resealed with wax. At first the express company were absolutely unable to locate the thief, but later on it was discovered that in resealing the package, the thief had wet his finger and pressed it on the warm wax, leaving a distinct imprint. The finger impressions of all the agents through whose hands the package passed, were taken, with the result that the thief was easily identified, a confession obtained and the money recovered. A jewelry store was entered and valuable diamonds that were on display on glass trays in the windows were stolen. In doing this the thieves left the imprints of their fingers on the glass. An expert, on making investigation with a powerful magnifier, discovered the imprints and by a careful photographic process was able to reproduce them on paper. A research being made among a collection of 20,000 finger-print records revealed the fact that the prints left on the glass tray were those of a well-known professional burglar, whose record had been taken some two years previously, while undergoing sentence in State prison. As a result the man was arrested and, through him, his partner in the crime, resulting in a conviction and the recovery of most of the goods.