Fig. 1. Hydro. its rel. weight 1 2. Azote 5 3. Carbone or charcoal 5 4. Oxygen 7 5. Phosphorus 9 6. Sulphur 13 7. Magnesia 20 8. Lime 23 9. Soda 28 10. Potash 42 11. Strontites 46 12. Barytes 68 13. Iron 38 14. Zinc 56 15. Copper 56 16. Lead 95 17. Silver 100 18. Platina 100 19. Gold 140 20. Mercury 167 21. An atom of water or steam, composed of 1 of oxygen and 1 of hydrogen, retained in physical contact by a strong affinity, and supposed to be surrounded by a common atmosphere of heat; its relative weight = 8 22. An atom of ammonia, composed of 1 of azote and 1 of hydrogen 6 23. An atom of nitrous gas, composed of 1 of azote and 1 of oxygen 12 24. An atom of olefiant gas, composed of 1 of carbone and 1 of hydrogen 6 25. An atom of carbonic oxide composed of 1 of carbone and 1 of oxygen 12 26. An atom of nitrous oxide, 2 azote + 1 oxygen 17 27. An atom of nitric acid, 1 azote + 2 oxygen 19 28. An atom of carbonic acid, 1 carbone + 2 oxygen 19 29. An atom of carburetted hydrogen, 1 carbone + 2 hydrogen 7 30. An atom of oxynitric acid, 1 azote + 3 oxygen 26 31. An atom of sulphuric acid, 1 sulphur + 3 oxygen 34 32. An atom of sulphuretted hydrogen, 1 sulphur + 3 hydrogen 16 33. An atom of alcohol, 3 carbone + 1 hydrogen 16 34. An atom of nitrous acid, 1 nitric acid + 1 nitrous gas 31 35. An atom of acetous acid, 2 carbone + 2 water 26 36.