9. A _BALNEUM MARIÆ_

10. ALCHEMICAL DISTILLING APPARATUS

11. A PELICAN

12. AN ALCHEMIST WITH A RETORT

13. AN ALCHEMIST PREPARING OIL OF VITRIOL

14. ALCHEMICAL APPARATUS FOR RECTIFYING SPIRITS

15. PURIFYING GOLD PRESENTED BY THE IMAGE OF A SALAMANDER IN THE FIRE

16. PRIESTLEY'S APPARATUS FOR WORKING WITH GASES

17. APPARATUS USED BY LAVOISIER IN HIS EXPERIMENTS ON BURNING MERCURY
IN AIR





CHAPTER I

THE EXPLANATION OF MATERIAL CHANGES GIVEN BY THE GREEK THINKERS.


For thousands of years before men had any accurate and exact knowledge