ELEMENTARY SUBSTANCES. 



33 



19. The following is a list of all the substances 

 which are at present considered as being simple, or 

 elementary : — 



1. Aluminum 



2. Antimony 



3. Arsenic 



4. Barium 



5. Bismuth 

 *6. Boron 



7. Bromine 



8. Cadmium 



9. Calcicum 



10. Carbon 



11. Cerium 



12. Chlorine 



13. Chromium 



14. Cobalt 



15. Columbium 



16. Copper 



17. Didymium 



18. Erbium 



19. Fluorine 



20. Glucinum 



21. Gold 



22. Hydrogen 



23. Iodine 



24. Iridium 



25. Iron 



26. Lantanum 



27. Lead 



28. Lithium 



29. Magnesium 



30. Manganese 



31. Mercury 



32. Molybdenum 



33. Nickel 



34. Niobium 



35. Nitrogen 



36. Osmium 



37. Oxygen 



38. Palladium 



39. Pelopium 



40. Phosphorus 



41. Platinum 



42. Potassium 



43. Rhodium 



44. Ruthenium 



45. Selenium 



46. Silicon 



47. Silver 



48. Sodium 



49. Strontium 



50. Sulphur 



51. Tellurium 



52. Terbium 



53. Thorium 



54. Tin 



55. Titanium 



56. Tungsten 



57. Uranium 



58. Vanadium 



59. Yttrium 



60. Zinc 



61. Zirconium. 



20. We will commence with those substances which 

 are of the greatest importance, whether simple or com- 

 pound, and gradually go through them, before enter- 

 ing upon the Chemistry of Vegetation. Foremost in 

 importance, of the substances whose properties we are 

 about to study, stands the Air. 



21. We are too apt to think of the Air as being 

 merely empty space; we move about through it with- 



