A METHOD OF THREADING WITH SILKWORM GUT

1922 Journal of the American Medical Association (JAMA)  
The desirability of using the original roentgenogram for the purpose of projection is generally recognized. Recently Dr. Norval H. Pierce1 described his method of cutting mastoid pictures to the size of lantern slides and then projecting as usual.
doi:10.1001/jama.1922.26410770001012b fatcat:ti2ajx22frcbne6boxcvfd5smq