13 juin 1835 - Calvin Goddard uses comparison microscope to determine what gun fired a bullet (1835)
Description:
Calvin Goddard was able to prove when and how a gun fired a bullet by comparing two bullets, one from a test gun and one from the suspects gun, under the microscope.Ajouté au bande de temps:
Date:
13 juin 1835
Maintenaint
~ Il y a 190 ans