Dr. Jay Barton II Holding Specimen
(Original Caption) Chemistry of Heredity (2). New York: Dr. Jay Barton II of Columbia University's Department of Zoology inspects two dried extract samples of nucleic acid taken from the germ cells of sea animals. The larger container holds the conventional quantity of DNA or desoxyribonucleic acid commonly removed from cell nuclei. The smaller one contains the DNA fraction isolated by Dr. Barton--its discovery supports theory that DNA is the chemical agent of heredity.