XVI. ILLUSTRATIONS AND FIGURES. 



FIG. PAGE 



30. Zeiss' direct-vision spectroscope . . . . . . 243 



31. Flask fitted for sugar estimation . . . . . . 254 



32. Titration in atmosphere of CO 2 . . . . . . 255 



33. Gooch crucible and apparatus . . . . . . 259 



34. Apparatus for Micro- Kjeldahl . . . . . . 261 



35. Titration in CO 2 - free atmosphere . . . . . . 261 



36. Urinometer . . . . . . . . . . . . 272 



37. Comparator for large tubes . . . . . . . . 276 



38. Gauge for calibrating tubes . . . . . . . . 276 



39. Hall's two-way tube for burettes . . . . . . 322 



40. Kjeldahl apparatus : direct boiling . . . . . . 325 



.41. Kjeldahl apparatus : steam distillation . . . . 326 



42. Kjeldahl apparatus : alcohol distillation . . . . 328 



43. Apparatus for ammonia estimation (Folin) . . . . 330 

 .44. Apparatus for ammonia and urea (Van Slyke) . . 331 



45. Flask for ammonia and urea . . . . . . . . 332 



45 a. Filtering flask and pump connexion . . . . . . 343 



46. Apparatus for estimation of acetone (Scott-Wilson) 350 



47. Esbach's albuminometer . . . . . . . . 358 



48. Ostwald pipette . . 381 



49. Method of reading burette . . . . . . . . 382 



50. Apparatus for reading burette . . . . . . 382 



51. Folin's fume-absorber . . . . . . . . 383 



52. Duboscq Colorimeter . . . . . . . . 384 



53. Path of rays in Duboscq Colorimeter . . . . . . 385 



54. Kober's Colorimeter . . . . . . . . . . 386 



55. Torsion balance . . . . . . . . . . . . 388 



