Subject
- Humboldt Manufacturing Company1
- Hydrogen-ion concentration1
- Hydrogen-ion concentration--Measurement--Instruments1
- Indigo1
- Industries1
- Infrared technology1
- Injections1
- Insect pests1
- Insects1
- International Business Machines Corporation1
- Jābir ibn Ḥayyān1
- Jewelry1
- Johns Hopkins University1
- Karl, Irene E. Dr., 1915-20061
- Laboratories--Equipment and supplies1
- Lagleize, Ferdinand1
- Lavoisier, Antoine Laurent, 1743-17941
- Lavoisier, Marie-Anne-Pierrette, 1758-18361
- Lead1
- Lead--Testing1