Eye color for a plausible argument stating that some eyes can or do change, based on chemical reactions and hormonal changes within the body. Studies on Caucasian twins, both fraternal and identical, have shown that eye color over time can be subject to change, and major demelanization of the iris may also be genetically determined. Most eye-color changes have been observed or reported in the Caucasian population with hazel and amber eyes. Carleton Coon created a chart by the original Martin scale. The numbering is reversed on the scale below in the (later) Martin–Schultz scale, which is (still) used in physical anthropology.
Dutch Schultz to suspect that Martin was skimming from the shakedown operation; Schultz had recently discovered a $70,000 disparity in the books. On the evening of March 2, 1935, Schultz invited Martin to a meeting at the Harmony Hotel in Cohoes, New York. At the meeting, at which Bo Weinberg and Dixie Davis were also present, Martin belligerently denied Schultz's charges and began arguing with him. Both men were drinking heavily as the argument continued and Schultz sucker-punched Martin. Finally, Martin admitted that he had stolen only $20,000, which he believed he was "entitled to" anyway. Dixie Davis related what happened next: