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INDEX TO THE PLATES. 



PLATE I. Transverse Sections of Recent Vegetables. 



Fig. 1. Monocotyledonous stem. Rhapisflabelliformis. Magnified 55 diameters. 



2. Gymnospermous Phanerogamic stem. Pinus balsamea. 55. 



3. Dicotyledonous Phanerogamic stem. Fraxinus excelsior. 55. 



4. American Fir. 55. 



5. Scotch Fir, Pinus sylvestris. 55. 



6. Norway Fir, Pinus Abies. 55. 



7. Common Yew, Taxus baccata. 55. 



8. American Cedar. 55. 



9. Cycas revoluta. 55. 



10. Mahogany, Swietenia Mahogani. 55. 



11. Common Oak, Quercus Robur. 55. 



12. Grey Poplar, Populus canescens. 55. 



13. Sanders Wood. 55. 



14. Sugar Cane, Saccharum officinarum. 55. 



15. Calamus. 55. 



PLATE II. Sections of Recent Pines. 



Fig. I. Pinus sylvestris. Transverse section. 100. 



2. Longitudinal section parallel to the medullary rays. 100. 



3. Longitudinal section parallel to the bark. 100. 



4. Spruce Fir. Transverse section. 100. 



5. Longitudinal, parallel to the medullary rays. 100. 



6. Longitudinal, parallel to the bark. 100. 



7. Weymouth Pine. Transverse section. 100. 



8. Longitudinal, parallel to the medullary rays. 100. 



9 Longitudinal, parallel to the bark. 100. 



