X CONTENTS. 



Paob 



XXVII.— The Apple Twig 106 



XXVIII. —The Apple and the Codling-Moth 108 



XXIX.— Wood 113 



XXX.— Leaves 116 



XXXI.— Seeds 122 



XXXII.— Germination 126 



XXXIII.-The Potato 129 



XXXIV.— Grass 131 



XXXV.— Plantain— A Weed .' 134 



XXXVI.— Bread 136 



XXXVII. —Sugar 140 



XXXVIII.— A Chair 143 



XXXIX.— A Eiver Valley 145 



XL. —A School Garden 149 



XLL— Soil 152 



XLIL— Clay and Sand 154 



XLIII.— Ice and Mica 157 



XLI v.— Limestone 158 



XLV.— Gold-Bearing Quartz 160 



XL VI.— Minerals 162 



XL VII.— Temperature 165 



XLVIIL— Conduction 170 



XLIX.— Convection 171 



L. — Evaporation 173 



LI. — Condensation 175 



LIL— Fog, Mist and Clouds 177 



Lin. —Rain 178 



LIV.— Hail 180 



LV.— Dew 181 



livL— The Sun 182 



LVIL— The Moon 185 



LVIIL— The Stars 188 



LIX.— The Lever and Fulcrum 191 



