CONTENTS. VII, 



Electricity? a most powerful agent in nature, . 180 



Emu, its great swiftness, 64 



Fall ot the leaf, observations on, 270 



Fishes, - 140 



structure of, 142 



. immense number of, - 145 



construction of, 147 



instincts of, - 150 



sagacity of, in depositing their spawn, 131 



migration of, - 152 



uses of, 153 



how they contribute to the comforts of man, 155 



Fixed stars, their beauty and number, 209 



why so called, - 212 



their distance from the earth, 214 



their uses, 215 



Flowers, their exquisite structure, - 28 



their variety and fragrance. - 29 



purposes for which they were designed, 35 



Fogs, Mists, Clouds, and Rain, salutary effects of, 181 



Fruit, reflections on, 260 



Frost and Snow, uses of, in the economy of nature, 182 



Goats, their remarkable agility, &c. 50 



Harvest moon described, - 191 



Herbs, use and importance of, 32 



Herrings, Cod fish, Mackerel &e. prolific powers of, 146 



their immense numbers, - 155 



observations on the natural history of, 261 



Insects, most numerous of nature's productions, 81 



beauty and symmetry of some, - 8 



