Two ways to make these objects visible are iodine fuming and cyanoacrylate 
Two ways to make these objects visible are iodine fuming and cyanoacrylate fuming. Melville MacNaghten discovered one of them belonging to the Stratton brothers. Francis Galton invented a method of sorting these objects, which come in latent and plastic types of these can be found. The FBI's IAFIS database contains over one hundred million patterns of these objects, which are classified as arches, whorls, or loops. For 10 points, name these unique patterns found on the ends of human digits.
Two ways to make these objects visible are iodine fuming and cyanoacrylate fuming.
fingerprints