Fred L. Parker (American, 1886-1956)

Charles Frederick Neagle (American, 1857-1944)

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

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

Hercules Incorporated (American, 20th Century)

Hercules Incorporated (American, 20th Century)

Hercules Incorporated (American, 20th Century)

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

Hercules Incorporated (American, 20th Century)

Hercules Incorporated (American, 20th Century)

Hercules Incorporated (American, 20th Century)

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

Anonymous

Jon Whitcomb (American, 1906–1988)

Hercules Incorporated (American, 20th Century)