TABLE OF CONTENTS 



PAGE. 



Introduction , i 



Formulae for the Calculation of Probable Error 7 



1 . Oxygen 8 



2. Silver, Potassium, Sodium, Chlorine, Bromine, and Iodine 34 



3. Nitrogen 58 



4. Carbon 72 



5. Sulphur 80 



6. Lithium 84 



7. Rubidium v 87 



8. Caesium 89 



9. Copper 91 



10. Gold 101 



1 1 . Calcium no 



12. Strontium 1 13 



13. Barium 1 18 



14. Lead 127 



15. Glucinum 132 



16. Magnesium 135 



1 7. Zinc 146 



18. Cadmium 156 



19. Mercury ., 166 



20. Boron 171 



21. Aluminum J76 



22. Gallium 181 



23. Indium 182 



24. Thallium 184 



25. Silicon 188 



26. Titanium 190 



27. Germanium 195 



28. Zirconium , 196 



29. Tin 199 



30. Thorium 204 



31. Phosphorus 209 



32. Vanadium 211 



33. Arsenic 213 



34. Antimony 4 216 



35. Bismuth 229 



36. Columbium 234 



37. Tantalum 236 



38. Chromium 238 



39. Molybdenum 250 



40. Tungsten 255 



41 . Uranium 263 



42. Selenium 268 



43. Tellurium 271 



44. Fluorine ...... 277 



(v) 



