Keywords: Bullet in flight.png One of the first photograps of the bullet in flight made by Peter Salcher with Ernest Mach in 1886 http //pluslucis univie ac at/PlusLucis/031/s22 pdf W Gerhard Pohl Peter Salcher und Ernst Mach Schlierenfotografie von à berschall-Projektilen 1886 Peter Salcher Ernst Mach PD-old Schlieren photography of bullets in flight |