LIST OF ENGRAVINGS ON STEEL. 



PLATE I. 



EXHIBITS SECTIONS OF VARIOUS WOODS, HIGHLY 

 MAONIFIED. 



Kio. Paoi 



1. Monocotyledonous stem, a portion of tlie trans- 



verse section of the sugar-cane, . . 24 



2. Transverse section of a coniferous stem; the 



Scotch pine, a, pith or medulla ; b b, medul- 

 lary rays, proceeding from the pith or centre, 

 to the circumference ; c c, the annular layers 

 or circles, ..... 25 



3. Section of Dicotyledonous stem; the oak, a, 



medulla; b b, medullary rays; c c, annular 

 circles; d, alburnum; e, liber; /, epidermis, 

 or outer bark, . . . . ib. 



4. Highly magnified view of hexagonal meshes of 



the pine, ..... ib. 



5. Perpendicular sections of the pine, with the 



areolae, . . . . . ib. 



6. Section parallel to the medullary rays, . ib. 



7. Transverse section of sugar-cane, highly mag- 



nified, ..... ib. 



8. Transverse section of the mahogany tr<!e, - ib. 



9. Do. of the oak, . . . . ib. 

 10, Do. of red sanders-wood, , . . ib. 



PLATE II. 



GEOSBAFIIICAL DISTRIBUTION OF PLANTS, WITH BE- 

 HABD TO ALTITUDE. 



TJie mountain on the lefl represents one of the Andes in 

 South America. 



1. Tropical zone, or region of palms, . . 170 



2. Temperate zone, cerealia and timber trees, - ib. 



3. Alpine zone, alpine plants and hardy trees, . ib. 



4. Arctic zone, lichens and mosses, . . ib. 



5. Snowy region, no vegetation, . . . ib. 

 The mountain on the right represents the British zones 



of climate. 



1. 'Woody region, grain, grasses, and fruit trees, 171 



2. Barren region, heaths and hardy trees, and 



shrubs, . . . . . . ib. 



3. Mossy region, lichens, mosses, and snow-line, ib. 



PLATE III. 



FUNGI, OR MUSHROOM PLANTS. 



1. Fly amanita. — A. muscaria, . 196 



2. Common mushroom. — Ag. campestris, , 194 



3. Kound-headed morel Morchella esculenta, 193 



4. Small-headed morel. — M. hybrida, . 196 



5. Tall cylindrical agaric A. comatus, . ib. 



6. Variable wood agaric -A. gilvus, ib. 



7. Shaggy agaric.~4. floccosus, . . . ib. 



8. Spangled watery agmc—Agaricus micaceus, ib. 



Fio. Vf.an 

 9. Warty false pnff bM.— Scleroderma verruca- 



sum, ..... 196 



10. Large bladder-like peziza— P. veiecufoja, . ib. 



11. Alpine amanita. — A. nivalis, . . ib. 



12. Red-stemmed boletus. — B. luridut, . . ib. 



13. Scaly hydrium. — //. imbricatum, . . ib. 



14. Hairy earth tongue. — Geoflossum hirsutum, ib. 



15. Hispid polyponis. — P. hispidus, . . ib. 



16. Sulphur-coloured polyporus. — (P. sulphureus), ib. 



17. Carmine peziza. — P. coecinea, . . ib. 



18. Scaly hydrium. — Hydrium imbricatum, . ib- 



19. Pale crested agaric. — A. cristatus, . ib. 



20. Mitral helvella. — H. mitra, . . . ib. 



21. Tuberous agaric. — A. tuberosus, . . ib. 



22. False puff hM.— Scleroderma cepa, . . ib. 



23. Large stemmed peziza. — Pez. macropus, . ib. 



24. Green and yellow agaric. — Ag. psittacinus, . ib- 



25. Crisped helvella. — H. leucophaa, . . ib. 



26. Reticulated peziza.— P. reticulata, . . ib. 



27. Yellow spathularia. — S. Jlavida, . - ib, 



PLATE IV. 



PALMS. 



1. Plantain. — Musa paradisiaca,- 



2. Cabbage palm. — Areca oleracea, . 

 8. Cocoa-nut palm. — Cocus nucifera, 



4. Fan palm. — Chamcerops humilis, . 



5. Oily palm. — Elais guineensis, 



6. Taliput palm. — C, umbraculifera, 



7. Date palm. — Phoenix dactylifera. 



260 

 £62 

 240 

 ib, 

 263 

 259 

 253 



