vi 



CONTENTS. 



The Small Water-Flea 68 



The Vaulter 69 



The Larva of a small Boat-Fly 69 



The Larva of a species of Water-Beetle. 70 



The Lurco, or Glutton 72 



Eels in Paste 73 



The Vinegar Eel 74 



CHAPTER IV. 



OF THE STRUCTURE OP WOOD AND 

 HERBS. 



Woody Portion 76 



Arrangement 77 



Cellular Tissue 78 



Pith 79 



Wood and Woody Texture 79 



Bark 80 



The Mode of Growth in the Trunk and 



Branches of Trees 81 



SECTIONS OF WOOD 83 



Pear Tree 83 



The Hazel 83 



English Oak 83 



White Oak 84 



Elm 86 



English Walnut 86 



Ash Branch 86 



Maple 87 



Dogwood 87 



White Pine 88 



Mallaca 91 



Whitewood 92 



Sumach 92 



Wormwood 93 



Root of Wormwood 93 



FOSSIL WOODS AND PLANTS 94 



Coal 96 



CHAPTER V. 



CRYSTALLIZATIONS. 



Nitrate of Potash, or Saltpetre 99 



Flowers of Benzoin. . . .100 



Sulphate of Iron, or Copperas 101 



Camphor 101 



Sal Ammoniac, or Muriate of Ammonia. 1 02 



Muriate of Barytes 102 



Bichromate of Potassa 103 



Sulphate of Soda, or Glauber Salts. . . 104 



Verdigris 105 



Sulphate of Magnesia, or Epsom Salts. 105 



Sulphate of Copper 106 



Alum 107 



Salt, or Chloride of Sodium 107 



Snow 107 



ON CRYSTALS POUND IN PLANTS. . . . 109 



CHAPTER VI. 



PARTS OF INSECTS AND MISCELLANE 

 OUS OBJECTS. 



Eyes .............................. 



Reticulated Eyes ................... 



Wings ............................. 



Hemerobius Perla .................. 



Feathers of Moths and Butterflies ____ 



Eggs .............................. 



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 ........................ 



Fuchsia ........................... 



Sweet Pea ......................... 



Fern Seed ......................... 



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