Page. Figure 1. Mill for grinding dry samples 7 ” 2. Comminutor for green samples 9 ” 3. Rasp for sugar beets 10 ” 4. Dreef grinding apparatus 11 ” 5. Water jacket drying oven 14 ” 6. Thermostat for Steam-Bath 15 ” 7. Spencer’s drying oven 17 ” 8. Electric vacuum drying oven 19 ” 9. Steam coil drying oven 21 ” 10. Carr’s vacuum drying oven 22 ” 10. (Bis.) vacuum oven open 23 ” 11. Apparatus for drying in a current of hydrogen 25 ” 12. Caldwell’s hydrogen drying apparatus 27 ” 13. Liebig’s ente 28 ” 14. Drying apparatus used at the Halle Station 29 ” 15. Wrampelmayer’s oven 30 ” 16. Ulsch drying oven 31 ” 17. Courtoune muffle 39 ” 18. Knorr’s extraction apparatus 45 ” 19. Extraction flask 46 ” 20. Extraction tube 46 ” 21. Extraction siphon tube 46 ” 22. Soxhlet extraction apparatus 48 ” 23. Compact condensing apparatus 49 ” 24. Improved compact extraction apparatus 51 ” 25. Knorr’s apparatus for recovering solvents 54 ” 26. Apparatus for recovering solvents from open dishes 55 ” 27. Common forms of pyknometers 63 ” 28. Bath for pyknometers 66 ” 29. Aereometers, pyknometers and hydrostatic balance 68 ” 30. Hydrostatic balance 69 ” 31. Course of rays of light in a nicol 77 ” 32. Theory of the nicol 78 ” 33. Laurent lamp 83 ” 34. Lamp for producing constant monochromatic flame 85 ” 35. Field of vision of a Laurent polariscope 86 ” 36. Laurent polariscope 88 ” 37. Tint polariscope 89 ” 38. Double compensating shadow polariscope 91 ” 39. Triple shadow polariscope 92 ” 40. Apparatus for producing a triple shadow 92 ” 41.