TABLE OF CONTENTS. xi 



CHAPTER VI. 

 Iiaticiferous Tubes. 



PAGE 



Sect. 45. The Latex 183 



„ 46. The Tubes 186 



„ 47. Articulated Tubes 189 



„ 48. Non-articulated Tubes 190 



„ „ History. General Observations 192 



CHAPTER VII. 

 Appendix. Intercellular Spaces. 



Sect. 49. General Observations. Development .... . . 200 



„ 50. Intercellular Secretory Reservoirs 201 



„ 51. Intercellular Reservoirs containing Air or Water 210 



„ 52. Diaphragms 217 



„ 53. Internal Hairs 220 



PART II. 

 ARRANGEMENT OF THE FORMS OF TISSUE. 



FIRST SECTION. PRIMARY ARRANGEMENT. 

 Sect. 54. General Observations. Epidermis, Hypoderma . . . . . 224 



CHAPTER VIII. 

 Arrangement of the Tracheae and Sieve-tubes. 



I. Outside the Vascular Bundles. 



Sect. 55. Scattered Tracheides 226 



„ 56. Sheath of Tracheides in Aerial Roots 227 



„ 57. Scattered Sieve-tubes 231 



2. Vascular Bundles. 

 „ 58. General Observations 232 



A. Arrangement of the Vasoular Bundles. 



a. In the Root. 

 „ 59 



