Subject
- Cosmetics1
- Cosmetics--Study and teaching1
- Cotton1
- Cottonseed oil1
- Crookes, William, 1832-19191
- Crystal gazing1
- Crystals1
- Curie, Marie, 1867-19341
- Cyclamates1
- DDT (Insecticide)5
- DDT (Insecticide)--Toxicology1
- Dacron3
- Dairy substitutes1
- Dalton, John, 1766-18441
- David, Jacques Louis, 1748-18251
- Davy, Humphry, Sir, 1778-18294
- Defense industries3
- Degussa (Firm)1
- Deisenhofer, Johann1
- Delaware River Chemical Works1