method

1950s

13176_29219_scientific_method1

Man in lab coat looks through microscope. Woman in lab coat handles…

1950s

13176_29219_scientific_method2

Close up of moldy petri dish with smoke in the background. Man in…

1950s

13176_29219_scientific_method3

Dark-haired Caucasian man with glasses and a lab coat pours brown…