As do _shallot_, _garlic_, _leek_, and _chive_. Onions are cooked whole in boiling water ½.

Ejus alia Opera Intelligenda Necessaria. 2. Opera Mineralia seu de Lapide Philosophico Libri duo. 3. Tractat vom stein der Weisen. 4. Fragmenta Quædam Chemica. 5. De Arte Chemiæ. 6. Breviorium Alchymiæ. 7. Documenta Alchymiæ. 8. De Alchymistarum Artibus. 9. De vi caustica et conversione salium alkalino-fixorum aëri expositorum in salia neutra. He published nothing upon that most important of his analyses.