CONTENTS. 



CHAPTER IV. 



PAGE. 



OF THE STRUCTURE OF WOOD AND HERBS. 



Woody Portion, 78 



Arrangement 79 



Cellular Tissue, 80 



Pith, 81 



Wood and Woody Texture, 



Bark 82 



The Mode of Growth in the Trunk and 



Branches of Trees, 83 



SECTIONS OF WOOD, 84 



The Holly, 



Pear Tree, 85 



The Hazel, 



English Oak, 86 



White Oak, 



Elm, 88 



English Walnut, " 



Ash Branch,.. 89 



Dogwood, 



White Pine, 90 



Mallaca, 93 



Whitewood, 94 



Sumach, " 



Wormwood, 95 



Root of Wormwood, 



FOSSIL WOODS AND PLANTS, 



Coal, 98 



CHAPTER V. 



CRYSTALLIZATIONS. 



Nitrate of Potash, or Saltpetre, 101 



Flowers of Benzoin, 102 



Sulphate of Iron, or Copperas, 103 



Camphor, " 



Sal Ammoniac, or Muriate of Ammonia,.. 104 



Muriate of Barytes, " 



PAGE- 



Bichromate of Potassa, 105 



Sulphate of Soda, or Glauber Salts, 106 



Verdigris, 107 



Sulphate of Magnesia, or Epsom Salts,. .. " 



Sulphate of Copper, 108 



Alum 109 



Salt, or Chloride of Sodium, 



Snow, " 



ON CRYSTALS FOUND IN PLANTS, Ill 



CHAPTER V. 



PARTS OF INSECTS AND MISCELLANEOUS OBJECTS. 



116 



117 



120 



,. 122 



Eyes, 



Reticulated Eyes, 



Wings,.. 



Hemerobius Perla, , 



Feathers of Moths and Butterflies, . 



Hairs, 



The Proboscis of the Ox-Fly, 



The Sucker of the Gnat, 



The Proboscis of the Bee, 



Sting of the Wild Bee, 



Feet, 



Antennae, 



Scales of Fishes, 



The Internal Organs of Respiration of the 



Silk- Worm, 



Magnified Flea, 



A Mite Magnified, 



Globules of Blood, 



The Web of the Frog's Foot, 



Pollen, 



Indian Corn, 



Fuschia, 



Sweet Pea, 



Fern Seed, 



125 







127 



128 



130 







132 

 133 



136 

 138 



140 







142 

 143 

 144 

 145 



