Seems like he did at least one thing right: not mention indigo, unlike newton who used this not-even-tertiary color as a 7th color rather than e.g. put cyan bet

Seems like he did at least one thing right: not mention indigo, unlike newton who used this not-even-tertiary color as a 7th color rather than e.g. put cyan between green and blue (ROYGCBV would have made more sense than ROYGBIV, color-wise)