Hercules Incorporated (American, 20th Century)

Hercules Incorporated (American, 20th Century)

Henriëtte Willebeek le Mair (Dutch, 1889 – 1966)

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

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

Charles Frederick Neagle (American, 1857-1944)

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

Hercules Incorporated (American, 20th Century)

Hercules Incorporated (American, 20th Century)

Coles Phillips (American, 1880 – 1927)

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

Hercules Incorporated (American, 20th Century)

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

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

Hercules Incorporated (American, 20th Century)