Charles Frederick Neagle (American, 1857-1944)

Hercules Incorporated (American, 20th Century)

Beckman Instruments (American, 20th Century)

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

Frederick Richardson (American, 1862-1937)

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)