The heart of Kerr’s contribution lies in his systematic approach to mineral identification. Before the advent of digital databases, the determinative table was the petrologist’s most valuable asset. Kerr organized minerals based on their optical properties in a logical, ascending order—typically by refractive index or birefringence.
She needed the bible. The old bible.
The old man smiled, a crack in dry earth. “Because I wrote the fifth edition. It’s in my briefcase. But I keep coming back to this one.” He tapped the green cover. “It’s where I first fell in love with the colors.” Optical Mineralogy Paul F Kerr.pdf
Optical crystallography and indicatrix
Mineralogical Society of America. (1958). Paul F. Kerr: Award Recipient. The heart of Kerr’s contribution lies in his