Subject
- Ground ivy1
- Gunpowder1
- Guyton de Morveau, Louis-Bernard, 1737-18162
- Gypsum1
- Hair1
- Harmonic analysis1
- Hassenfratz, J. H. (Jean-Henri), 1755-18273
- Heart1
- Hedgehogs1
- Helvetius2
- Hematite1
- Henry, Thomas, 1734-18164
- Hens1
- Heraldry1
- Herbals24
- Herbs4
- Herbs--Therapeutic use4
- Herons1
- Herschel, John F. W. (John Frederick William), 1792-18714
- High mallow1