TABLE OF CONTENTS. 



PAGE. 



Introduction vii 



Formulce for the Calculation of Probable Error xii 



1. Oxygen i 



2. Silver, Potassium, Sodium, Chlorine, Bromine, Iodine, and Sulphur 9 



3. Nitrogen 39 



4. Carbon 50 



5. Barium 57 



6. Strontium 64 



7. Calcium 67 



8. Lead 72 



9. Fluorine 78 



10. Phosphorus 82 



11. Boron 84 



12. Silicon 85 



13. Lithium 87 



14. Rubidium 90 



15. Caesium 91 



16. Thallium 93 



17. Glucinum 96 



18. Magnesium 100 



19. Zinc 108 



20. Cadmium .... iii 



21. Mercury 1 14 



22. Chromium 1 17 



23. Manganese 127 



24. Iron J.. 131 



25. Copper 135 



26. Molybdenum 137 



27. Tungsten 143 



28. Uranium 150 



29. Aluminum 156 



30. Gold „ 162 



31. Nickel and Cobalt 164 



32. Selenium 176 



^^. Tellurium iSo 



34. Vanadium 1S3 



35. Arsenic ' 1S5 



36. Antimony 188 



37. Bismuth ._' 202 



(V) 



