Dow Chemical Company (American, 19th/20th Century)

Dow Chemical Company (American, 19th/20th Century)

Dow Chemical Company (American, 19th/20th Century)

Anonymous

Hercules Incorporated (American, 20th Century)

Fred L. Parker (American, 1886-1956)

Jon Whitcomb (American, 1906–1988)

Hercules Incorporated (American, 20th Century)

Hercules Incorporated (American, 20th Century)

Hercules Incorporated (American, 20th Century)

Anonymous

Anonymous

Hercules Incorporated (American, 20th Century)

Coles Phillips (American, 1880 – 1927)

Hercules Incorporated (American, 20th Century)