Hercules Incorporated (American, 20th Century)

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

Hercules Incorporated (American, 20th Century)

Anonymous

Hercules Incorporated (American, 20th Century)

Joseph Christian Leyendecker (American, 1874 - 1951)

Hercules Incorporated (American, 20th Century)

Hercules Incorporated (American, 20th Century)

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

Beckman Instruments (American, 20th Century)

Anonymous

Hercules Incorporated (American, 20th Century)

Hercules Incorporated (American, 20th Century)

Anonymous

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