Edward Vincent Brewer (American, 1883-1971)

Hercules Incorporated (American, 20th Century)

Beckman Instruments (American, 20th Century)

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

Fred L. Parker (American, 1886-1956)

Anonymous

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

Hercules Incorporated (American, 20th Century)

Beckman Instruments (American, 20th Century)

Hercules Incorporated (American, 20th Century)

Hercules Incorporated (American, 20th Century)

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

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

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