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Subject
- Chemical industry131
- Corporations131
- Dearborn Chemical Company130
- Water purification chemicals industry96
- Employees94
- Laboratories52
- Scientific apparatus and instruments50
- Glassware28
- Women employees19
- Water--Analysis17
- Water--Testing14
- Machinery11
- Trade shows8
- Offices7
- Balances (Weighing instruments)6
- Barrels5
- Bunsen burner5
- Betz Laboratories, Inc.4
- Boardwalks4
- Drinking water4