MAGNIFIED FINGER PRINT
The above is an enlarged print of a right index finger, which we classify as an Ulnar Loop. Loops on different fingers are not all alike, but vary in many important characteristics, so it is a very easy matter to distinguish one from another.
FINGER PRINT OUTFIT
INSTRUCTIONS FOR TAKING FINGER PRINTS.
Instruments required: A piece of tin, ordinary printer's ink, and a 10-cent rubber roller are all the tools necessary for getting the impression. It requires no special training to take finger impression, and any rural constable can, with ten minutes' practice, take a set of good finger prints in five minutes. After having a week's practice he could take them in three minutes.
Scotland Yard Method.
At Scotland Yard a metallic brace is in use for the purpose of forcing refractory prisoners to leave correct impressions upon the records. One application of this brace is persuasive enough to cause the culprit to hasten to comply with a request for his signature.
A small slab stone is covered with ink, which is distributed with a sprayer, and the prisoner is compelled to place his fingers in the ink and then firmly implant them upon paper.