xiv LIST OF ILLUSTRATIONS 



FIG. PAGE 



17. Illinois University : Plan of the First Floor . between pp. 40 and 41 



18. Illinois University : Plan of the Second Floor ,, 42 and 43 



19. Sydney University : Chemical and Metallurgical Laboratories . facing 44 



20. Sydney University : Chemical and Metallurgical Laboratories 



Basement Plan 45 



21. Sydney University : Main Laboratory . . . . 46 



22. Sydney University : Assay Room . . . . 46 



23. Zurich Federal Polytechnic : Larger Laboratory for Applied 



Chemistry ........... 47 



24. Birmingham University : Microscope Room. Brewing Depart- 



ment . . . 52 



25. Birmingham University : Brewing Department . . . ,, 52 



26. Municipal School of Technology, Manchester . . 53 



27. Municipal School of Technology, Manchester : Inorganic 



Chemistry Laboratory . . . . . . . ,, 54 



28. Municipal School of Technology, Manchester : Dyeing Labora- 



tory ,,55 



29. Charlottenburg : The Chemical Laboratories . . . 60 



30. Schimmel and Co., Miltitz : Research Laboratory . . ,, 60 



31. Government Laboratory : Customs and Excise Main Labora- 



tory ... 61 



32. Government Laboratory : Electric Heaters for Wine and Spirit 



Distillation ,,62 



33. Government Laboratory : Muffle Furnaces for Incineration of 



Tobacco ,,63 



34. Government Laboratory : Electric Furnace Room for Steel 



Analysis ........... 64 



35. Sprengel Pump in Sir William Crookes' Laboratory . . ,, 65 



36. Government Laboratory : Apparatus for Electro-Analysis . ,-, 68 



37. Government Laboratory : Spectroscope Room . . ., 69 



38. A Short Beam Balance ....... on 77 



39. Micro-balance of Steele and Grant . . . . . ,, 78 



40. Moissan's Electric Furnace . . . . . . . ,, 82 



41. Carbonic Acid Curves . . . . . . ,, 86 



42. Cumulative Cooling for Liquefaction of Air . . 88 



43. Filter-pumps . . 91 



44. Sprengel's Mercury Pump . . . . . . 93 



45. Charcoal Vacuum Vessel ..... , 95 



46. 1 Square Centimetre . ... 



47. Electric Discharge under Reduced Pressure . 



48. Phosphorescence Produced by Cathode Rays. 



49. J. J. Thomson's Apparatus ..... 



50. J. J. Thomson's Apparatus for Studying Positive Rays 



51. Properties of Thirty-five Solid Elements 



52. Gold Leaf Electroscope 



114 

 115 

 116 

 117 

 119 

 129 

 142 



53. Rutherford's Electroscope .......,, 151 



54. Strutt's Radium Clock 152 



55. Evolution of the Elements (Crookes) ..... facing 162 



56. Section of Diaphragm for Surface Combustion (Bone) . . on 210 



57. Boiler with 110 tubes at Skinningrove Iron Works '(Bonecourt 



System) ... . . ..... facing 210 



58. Experimental Tubular Boiler for Surface Combustion (Bone) . on 211 



59. Tetrahedral Carbon ' . . 216 



60. Tetrahedral Carbon . . . . . . . 218 



61. Cubic Assemblage of Equal Spheres . ... . . ',. 222 



62. Hexagonal Assemblage of Equal Spheres . , ', 222 



