898 



PAGE 



Stems, forms of 187 



Stamens, filament and anther 211 



Struggle among plants 248 



Star fish described 262 



Stigmata insects 277 



Stars described 318 



Streams, study of 390 



Struggle for existence 380 



Study of Marchautia 200 



Study of Mosses 201 



Study of Ferns 204 



Study of the Pine 217 



Study of growing corn 



Study of the Oat 



Study of the Trillium 



Study of the Oak 



Study of the Bean 



Study of the Crayfish 



Study of a Spider 



Study of the Giasshopper 



Study of a Mussel 



Study of a Fish 



Study of a Bird 



Study of a Mammal 



Surface Tension 



Sunlight, its effects 



Sulphur, forms of 



Sulphur, compounds of 



Sulphuric acid, how made.. . . 



Sulphuric acid, its uses jay 



Sugar from cane and beet 175 



Sugar, manufactured 176 



Sundew Family 233 



Succession of plants 249 



Sun, description of 316 



Sun spots, effect 816 



Sun, size and motions 317 



Suidse or Swine Family 309 



Survival of the fittest 380 



Swimmerets, crayfish 269 



Syenite composition 323 



Syngenesious 211, 242 



.. 221 



.. 223 



,.228 



.. 240 



.. 268 



... 272 



.. 280 



.. 286 



.. 292 



.. 301 



.. 305 



.. 21 



. .. 70 



.. 137 



.. 138 



Tallow, source and use 



Tannic acid 



Tanning, process of 



Tape Worms described 



Tapirs described 



Talpidse, or Moles 



Talc, composition of 



Temperature defined 



Tenacity and toughness 



Telescope, refracting 



Telescope, reflecting 



Telescope, terrestrial and Galilean 



Telephone bells 



Telautograph, Gray's 



Temperature for plants 



Tergite, sternite, pleurite 



Telson, the parts of 



Termites, or white ants 



Teleostei described 



Temperature modified by land 



Temperatmre modified by water . . . 

 Temperature. great variation of 



Tertiary Age, divisions of 



Tertiary deposits, where ? 



Tertiary Rocks and Life 



Tertiary Lava flows 



Tertiary Mountains formed 



178 



180 



180 



264 



308 



313 



321 



26 



32 



81 



82 



82 



99 



100 



280 



331 

 337 

 359 

 359 

 360 

 861 

 861 



Terrace Period defined 



Thermometer, principle of 



Thallophytes mentioned ...... 



Thorax of Arthropoda 



Thysanura, or Spring Tails 



The Earth, motions of 



The Air, how warmed 



The Air modifies temperature. 



The Air varies in density 



The Air and winds * 



Theories of Matter 



Theories of Heat and Light . . . 



The Sea first formed 



Time, importance of 



Time, an element in work 



Tin, properties and use 



Tissues of plants 



Tissue systems 



Tides, how formed 



Torulse described 



Tobacco, its relations 



Topographic work 



Townships and Ranges 



Townships, how divided 



Transparent bodies 



Trematoda described 



Tragacanth, a germ 



Trichina described 



Trichomes named 



Trilobites, abundant when ? . 



Trap-door spider 



Tracheae of insects 



Trichechidse, or Walruses 



Trachyte Rock described 



Turbine wheels : 



Turpentine, etc 



Tubellaria described 



Tulip Tree mentioned 



Tubicolse described 



Tubitelse, spiders 



Tunicata described 



Turtles, description of 



Turf and trees, protect 



PAGE 

 .. 370 

 .. 26 

 .. 197 

 .. 267 

 .. 279 

 .. 331 

 .. 332 

 .. 333 

 .. 333 

 .. 333 

 .. 377 

 .. 877 

 .. 348 

 .. 13 

 .. 61 

 .. 167 

 .. 184 



Umbels described 



Umbo of a shell 



Undulatory, theory of heat. . . 



Unit of Time 



Unity in Plant Structure 



Univalve Shells 



Unity of Plants and Animals. 

 Ursidse or Bears 



191 

 241 

 384 

 384 

 886 

 71 

 263 

 240 

 265 

 188 

 271 

 272 

 277 



68 

 172 

 263 

 231 

 265 

 273 

 289 

 300 

 347 



238 



286 



14 



43 



244 



288 



379 



313 



Vaporization explained 29 



Valence explained 128 



Vascular Plants 190 



Vaucheria described 195 



Valvate explained 235 



Variation in Form 244 



Valleys, Preglacial 366 



Velocity defined 43 



Vegetable Parchment 174 



Venus Fly Trap 234 



Vermes or Worms 2G3 



Vespidse or Wasps 283 



Vertebrata, characteristics of 290 



Vertebral column 290 



Veins and Fissures 826 



Vibrations of the Pendulum 50 



