CONTENTS. 



CHAPTER II. 



ASSIMILATION OF CARBON. 



SECTION A. Formation of starch. 24. Sachs' Iodine method. 

 25. Schimper's method. 26. Variegated leaves. 27. Disappear- 

 ance of starch in darkness. 28. Effect of dull light. 29. Local 

 effect. 30. Gardiner's experiment. 31. Kays of different refran- 

 gibility. 32. Terrestrial leaves under water. 33. Stomata and gaseous 

 exchange. 34. Excess of C0 2 . 35. Plants deprived of C0 2 . 36. Gain 

 in weight. 37. Translocation. 38. Assimilation of sugar. 39. Do., 

 formaldehyde. 40. Leucoplasts pp. 21- -34. 



SECTION B. Evolution of oxygen. 41. Bubbles of gas. 

 42. Light of varying intensity. 43. Dependence on presence of C0 2 . 

 44. Temperature and gas evolution. 45. Chloroform. 46. Co- 

 loured lights. 47. Collection of gas evolved. 48. Engelmann's 

 blood method. 48 A. Farmer's experiment. 49. Phosphorus method. 

 50. Gas analysis, Pi'effer's method. 51. Gas analysis, Winkler-Hempel 

 apparatus. 52. Timiriazeff's Eudiometer. 53. Engelmann's bacterial 

 method. 54. Diffusion of gas through cuticle . . pp. 35 49. 



SECTION C. Reactions of chlorophyll and of some other pig- 

 ments. 55. Separation by benzene, ether, olive oil. 56. Action 

 of light. 57. Aeration and effect of light. 58. Action of acid. 

 59. Action of copper salts. 60. Stability of the copper compound. 

 61. Spectroscopic examination. 61 A. Part of the red rays not ab- 

 sorbed. 26. Anthocyan in Eicinus, &c. 63. Floridese. 64. Brown 

 sea-weeds pp. 5O 53. 



SECTION D. Production of chlorophyll, etiolation, sun- and 

 shade-leaves. 65. Appearance of the green colour. 66. Etiolin 

 and light. 67. Pinus. 68. Chlorophyll formation and tempera- 

 ture. 69, 70. Do. and oxygen. 71. Do. and iron salts. 

 72. Form of etiolated plants. 73. Sun- and shade-leaves. 



pp. 5457. 



CHAPTER III. 



FURTHER EXPERIMENTS ON NUTRITION. 



SECTION A. Water-culture. 74. Method. 75. Potassium 

 salts necessary. 76. Phosphoric acid necessary. 77. Experi- 

 ments with Lemna. 78. Calcium oxalate formation. 79. Nitrate 

 reaction pp. 58 67. 



