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A maternity hospital in Chicago has adopted the footprint as a means of identifying its tiny charges. The Chicago hospital takes the footprint of every infant that is born or brought there before the baby is an hour old. The present way of obtaining a baby's footprint is to spread some printer's ink on a printer's roller and run it over the baby's foot; then the foot is pressed against a sheet of white paper, which leaves the impression desired. After the impression is obtained, the ink remaining on the baby's foot has to be removed by washing with absorbent cotton saturated with alcohol or benzin.
In order to obviate the use of ink, the baby's foot should be rubbed with cold cream. Then a sheet of plain white paper is pressed against the bottom of the foot so that the entire surface of the sole of the foot comes
Taylor JH. TAKING FOOTPRINTS WITHOUT INK. JAMA. 1916;LXVII(9):676. doi:10.1001/jama.1916.25910090002009a