A history of the first half-century of the National Academy of Sciences, 1863-1913.

1863-1913

Annual record of science and industry.

1872

Annual record of science and industry.

1878

Annual record of science and industry.

1877

Annual record of science and industry.

1874

Annual record of science and industry.

1871

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.45 (1893)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.5 (1850-1851)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.34 (1882):[Lacks:pg.76-77]

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.50 (1898)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.73 (1921)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.11 (1859)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.31 (1879)