1954.
[handwritten chart]
D X R
Negro X white
[backslashed line]
Mulatto
[score]
1) M X M
[split lines branching left,]
25 blacks
[center,]
50 M
[and right]
25 whites
2) M X N D+R X D+D
2DD 2RD +
[split lines branching left,]
50M
[center, with nothing beneath,]
[and right]
50 N
3) M X W
[split lines branching left,]
50 M
[center, with nothing beneath,]
[and right]
50W
[end]