INDEX 



481 



Power, 25 

 Preservation, 435 

 Pressure, atmospheric, 39 



of air, 233, 248 



reduced, 87 



standard, 40 

 Priestley, 46 

 Printer's ink, 112 

 Prism, 160 

 Properties, 5, 6 

 Proteids, 55, 347, 356, 362 

 Proteoses, 356, 362 

 Protoplasm, 286, 302, 377 

 Prussic acid, 116 

 Ptomaines, 428 

 Ptyalin, 352, 359, 361 

 Pulley, 174, 178 

 Pulmonary circulation, 373 

 Pulse, 375 

 Pumice, 261, 263 

 Pumps, 39, 41, 42, 43 

 Pupa, 323 

 Pylorus, 355 

 Pyrometer, 14 

 Pyrogallic acid, 166 



Quarantine, 450 

 Quarter sawing, 293 

 Quartz, 259, 261 

 Quicklime, 94, 192 



Rabies, 449 

 Radial sawing, 292 

 Radiation, 63 

 Radius, 344 

 Rain, 57, 240 

 Rainbow, 161 

 Rainfall, 241, 250 

 Rain gauge, 241 

 Reaction, alkaline, 192 

 Receptacle of flower, 297 

 Reduced pressure, 87 

 Reflected light, 155, 156 

 Reflection, angle of, 156 

 Reflex action, 404 

 Refraction, of light, 158 



of sound, 159 



Relative humidity, 236, 237 

 Rennin, 356, 359 



Reptiles, 328 



Reservoirs, 274 



Residual mantle rock, 266 



Residual soil, 270 



Resistance, 141, 142 



Respiration, 39, 51, 52, 376, 379 



Retina, 415, 417 



Retort, 47 



Ribs, 343 



Rocks, 258, 259, 260 



Rock salt, 102 



Roots, 295 



Rootstock, 291 



Rotation of crops, 277 



Rusting, 39, 48, 50 



Safety lamp, miner's, 114 



Sailboat, 182 



Sal ammoniac, 105 



Sal ammoniac cell, 138 



Saliva, 351 



Salt, 87, 89, 90, 91, 102, 349 



Salts, 193, 194 



tests for, 194, 195, 196 

 Sand blast, 43 

 Sand dune, 265 

 Sandstone, 259 

 Sap, 294 

 Saprophyte, 303 

 Saturation, 235 

 Scapulas, 343 

 Scarlet-fever, 447 

 Science, 1, 3 



general, 3 



Scientific method, 2, 3 

 Screw, 174, 181 

 Secretion, 351, 366, 377, 379 

 Sedentary soil, 270 

 Sedimentary rocks, 261 

 Seeds, 297, 298, 299, 301 

 Sense organs, 399 

 Senses, special, 409 

 Sepals, 297 

 Separator, dairy, 27 

 Serum, 444 

 Shadows, 152 

 Shale, 259 

 Sight, 409, 415 

 Silicon in soil, 275 



