CONTEXTS. 



CHAPTER IV. 



PAGE. 



OF THE STRUCTURE OF WOOD AND HERBS. 



Woody Portion, 



Arrangement, 



Cellular Tissue, 



Pith, 



Wood and Woody Texture, 



Bark, 



The Mode of Growth in the Trunk and 



Branches of Trees, 



SECTIONS OF WOOD, 



The Holly, 



Pear Tree, 



The Hazel, 



English Oak, 



White Oak, 



Elm, 



English Walnut, 



Ash Branch, 



Maple, 



Dogwood, 



White Pine, 



Mallaca, 



Whitewood, 



Sumach, 



Wormwood, 



Root of Wormwood, 



FOSSIL WOODS AND PLANTS, 



Coal, 



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, 



PAGK- 



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. 



Eyes, 116 



Reticulated Eyes, 117 



Wings, 120 



Hemerobius Perla, 122 



Feathers of Moths and Butterflies, " 



Eggs 125 



Hairs, " 



The Proboscis of the Ox-Fly, 127 



The Sucker of the Gnat, " 



The Proboscis of the Bee, 128 



Sting of the Wild Bee, 130 



Feet, " 



Antennee, 132 



Scales of Fishes, 133 



The Internal Organs of Respiration of the 



Silk-Worm, 136 



Magnified Flea, 138 



A Mite Magnified, 140 



Globules of Blood, 



The Web of the Frog's Foot, 142 



Pollen, 143 



Indian Corn, 144 



Fuschia, 145 



Sweet Pea, " 



Fern Seed, * 



