INDEX. 



PAGE 



Abdomen of Grasshopper 280 



Abdomen of Insects 276 



Absolute Zero 42 



Acids defined 118 



Acids named 119 



Acetylene, how formed 134 



Acetic Acid, composition 177 



Acid of Lemons, etc 180 



Acorn, the parts of 228 



Acarina, Mites and Ticks 272 



Adhesion defined 21 



Adaptation illustrated 246, 302 



Adductor Muscles 286 



Age of the Earth 372 



Air, properties of 115 



Air, composition of 116 



Air, pressure of 39 



Air Plants described 246 



Aluminium described 161 



Aluminium, compounds of 161 



Alumus, different kinds 161 



Albumen, composition of 176 



Alcohol, composition of 177 



Alternation of generations 201 



Allantois, purpose of 298 



Algonkian Era described 349 



Ammonia, composition of 116 



Ammonium , a compound 117, 153 



Ammonium, chloride 117, 153 



Ammon mm, nitrate 118 



Ammonium sulphide 153 



Amphibia described 296 



Amoeba, description of 259 



Amnion, a membrane 298 



Aniline and Aniline Colors 169 



Antheridia described 200 



Anthophyta defined 207 



Andro2cium defined 224 



Annuals defined 233 



Annelida described 265 



Autenuse defined (crayfish) 270 



Antennulse defined 270 



Ants, communities of 282 



Anthropomorphse 314 



Annuals as geological agents 347 



Aphidse, Plant Lice 281 



Apidse or Bees described 283 



Apoda, description of 297 



Aristotle, theories of 14 



Arsenic and its compounds 144 



Arsenical Colors 145 



Arsenic, tests for 145 



Archegonia described 200 



Arthropoda described 258, 267 



Arachnida described 272 



Araneida, true spiders 272 



Artiodactyla described 



Archsean Era described 



Archaean Rocks, kinds of 



Assimilation defined 



Astronomical Geology 



Atoms and Atomic Theory. . 

 Attraction defined... 



PAGE 



...348 

 ...349 

 ...188 

 ... 316 

 .17,104 

 . 19 



Attractive Forces, effect of 25 



Auditory hairs and sac 270 



Avogadro's Law stated 123 



Aves or Birds described 300 



Avalanches of Rock, etc 341 



40 

 95 

 99 

 118 

 156 



Barometer, principle of 

 Batteries, Electrical, described 

 Batteries, Storage, described 

 Base, definition and composition. 

 Barium and its compounds ..... .. 



Bacteria, description of ............. 191 



Bark, manner of growth ............. 217 



Banana Family described ........... 226 



Barnacles described ................ 271 



Batrachia described ................ 297 



Basalt, composition of .............. 323 



Base lines and correction lines ... .384 



Benzole, composition of ............ 169 



Bees or Apidse described ........... 288 



Bismuth and its compounds ....... 166 



Biennials defined .................... 233 



Bivalve Shells described ............ 286 



Birds, description and study of ..... 301 



Birds, development of ............... 302 



Botany, treats of what ............... 12 



Boiling Point explained ............. 29 



Boron and its compounds ........... 136 



Botany, general statement .......... 182 



Botany in winter ..................... 388 



Bony Tissue described .............. 253 



Boulders, from the drift ............. 364 



Boulder Clay or Till ................. 364 



Brittleness defined .......... ........ 32 



Breezes, Land and Sea ............... 49 



Bromine described ............ ...... 124 



Brick, made of what ................. 161 



Bread making explained ............ 178 



Bryophyta described ................ 200 



Brittle Stars described ............. 262 



Bryozoa described ................... 289 



Brachioppda described .............. 289 



Bunsen Burner described ........... 133 



Butterflies, description of ........... 281 



Buckwheat Family described ....... 229 



Capil lary Attraction denned ........ 22 



Capstan described ................... 66 



