396 



JNDEX. 



Oak Family described 



Oak, different kinds 



Oak Timber, value of 



Obesa or Hippopotami 



Obsidian, volcanic glass 



Ocellus, Ocelli, eyes 



Octopus, Devilfish 



Ocean Currents, causes 



CEdogonium described 



Oils, composition of 



Oil of Bergamot, etc 



Oidium Tucheri (fungi) 



Olefiant Gas Composition 



Olive Family described 



Olfactory cells, etc 



Oligocb.se ta (worms) ? 



Oldest laud in America 



One-celled organisms 



Oophyta, characteristic of 



Oospore, a spore case 



Opaque bodies defined 



Opera Glass described 



Opium, source and use 



Opercle, Subapercle, etc 



Ophidia or Snakes 



Orchid Family described 



Orange, Lemon, etc 



Organs, systems of 



Organs of Locomotion 



Organisms, Complex 



Organs, developed from 



Organic Development 



Orbitelse (wheel-spinners) 



Orthoptera described 



Oscillaria, blue-green scum . . . 



Osseous or Bony Tissues 



Ostridse or Oysters 



Oscillations of the Crust 



Overtones or Harmonics 



Ovule described 



Ovum or Egg-cell 



Ovum, development of 



Oxygen, discovery of 



Oxygen, preparation of 



Oxygen, properties of 



Oxides defined 



Oxides of nitrogen 



Oxyhydrogen flame 



Oxalic and other acids 



Oysters, development of 



Palets and awns 



Palm Family described 



Paloeozoic Era and Sea 



Panicle described 



Pancreas described 



Parsley Family described 



Pappus described 



Parasites, plants 



Passeres or Passerine buds . . . 



Pendulum, use of 



Petroleum, gases of 



Petroleum oil, source of 



Perennials defined 



Pediculidse or lice 



Perissodactvla described 



Physics deals with what 1 



Physics and chemistry distin- 

 guished 



Photometry explained 



PAGE 

 .. 227 



228 

 310 



275 



.... 195 

 .... 178 

 .... 172 

 . ..196 

 .... 134 

 .... 242 

 .... 256 

 .... 265 

 .... 351 

 .... 254 

 .... 195 

 .... 195 

 .... 71 

 .... 82 

 .... 232 

 .... 293 

 ... 299 

 .... 225 

 .... 235 

 .... 251 

 .. . 256 

 .... 254 

 .... 257 

 .... 377 



273 



279 



.... 193 

 .... 253 

 ....288 

 .356, 369 



54 



... 213 



256 



.... 257 

 .102, 106 

 .... 106 



108 



110 



.... 118 



112 



.. 180 



.... 221 



.... 225 



.... 352 



222, 237 



... 255 



... 237 



.... 243 



.188, 198 



304 



50 



134 



.172, 356 



.... 233 



.. 281 



..11, 15 



. 15 

 .... 72 



PAGE 



Phosphorus, source of 141 



Phosphorus, different forms of 142 



Phosphorus, uses of 144 



Photography, principle of 160 



Phocidse or seals 313 



Pistil, stigma, style, and ovary.... 212 



Pine, a study of 215 



Pine, the growth of 218 



Pink Family described 230 



Pitcher plant described 2;>4 



Pisces or fishes described 290 



Pithecidse described 314 



Plants fertilized by insects 242 



Plaster of Paris, how made 155 



Platinum, properties of 168 



Plants, composition of 182 



Plants as geological agents 347 



Placenta, purpose of 212 



Plumule described 213 



Pleurite, sternite, etc., 269 



Planets named in their order 317 



Planetoids or asteroids 318 



Porosity explained 18 



Potential energy 58 



Power, loss of, in use 67 



Potential, high and low 94 



Potential energy in coal HO 



Poles, positive and negative 94 



Potassium, properties of 146 



Potassium, compounds of 147, 148 



Pottery ware, how made 162 



Porcelain ware, how made 162 



Potassium per mangauate 165 



Pot holes, how formed 345 



Poppy Family descri bed 232 



Proboscidea described 311 



Prisms described 83 



Projectiles, trajectory, etc 47 



Prosimioe or Lemurs 314 



Primates or apes 314 



Principal meridians 384 



Progress means what 383 



Processes of life 190 



Protoplasm described 183 



Protophyta described 190 



Protococcus, green scum 102 



Protonema in Mosses 201 



Prothalium in Ferns 203 



Proembryo, embryo, etc 213 



Protection, means of, in plants 248 



Preservation specimens of plants.. 249 



Pronucleus, male and female 257 



Protozoa described 258 



Pseudopodia described 259 



Ptolemy, theories of 14 



Pump, principles of 41 



Pulley, equation of 66 



Pulque plant and pulque 238 



Pulse or Pea Family 239 



Pyrometer, made of what ? 27 



Pyroxene and Hornblende 321 



Pyrites of iron described 322 



Quartz or Silica 135, 320 



Quaternary Age 362 



Quaternary plants and animals 370 



Radiation explained 27 



Radiators, good and poor 30 



Rainbow explained 85 



