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SCALE .9

Eugenic* Record Office, Cold Spring Harbor, Long Island, N. Y.

Pedigree Chart ShowIr>g the Manner of Construction and the Use of Standard and Special Symbols.

GRAPHIC PRESENTATION

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Eugenics Record Office, Cold Spring Harbor. Long Island, N. Y. SCALE .7

A. A Geneology Chart Showing the Actual Pedigree of Pre-Senile Lamellar Cataract.

1. Following the practice of tracing only one trait on one pedigree chart, this chart traces

the trait of pre-scnile lamellar cataract. All individuals of the family tree are plotted even though all do not show the trait.