INDEX. 



443 



PAGE 



Old people far sighted 390 

 hold objects at a 



distance .. 392 

 lose their sensa- 

 tion, thought, 

 volition .... 425 

 lose their power 



of walking .. 425 

 spectacles for . . 391 



Oil 74 



linseed 119 



of turpentine .... 119 



of vitriol 426 



One pot will not boil in 



another .... 118 

 how to make it 



boil 118 



Oxalic acid 426 



copper 259 



iron 257 



OXIDE of lead . . 259, 426 

 platinum .. 261 

 potassium . . 262 

 silver .... 260 

 sodium .... 262 



Oxygen 34 



of air 97 



its use 240 



supports combus- 

 tion 240 



sustains life .... 

 Out-of-door work pro- 

 duces hunger .... 89 

 Owls prowl at night . . 367 

 see in the dark . . 367 

 sleep all day .... 367 



Paleness 243 



Palmer's candles 80 



PACK 



Paper burns 41 



not always 44, 53 

 extinguishers . . 79 

 puckers from wet 339 

 used for kindling 41 



Papillae 425 



Paris, plaster of 426 



rain of 340 



Parlours smell of smoke 



in summer 71 



Partition walls to arrest 



sound 415 



Pea soup fog 225 



PERCUSSION 95 



Perspiration 89 



Petals 402 



Petrels 154 



Phosphate of lime 284 



Phosphorus 283, 284 



PHOSPHURETTED HY- 

 DROGEN GAS 283 



Piano-forte 412 



Pickle tested 361 



Pie with a cup 120 



full of juice 121 



Pin puts a candle out. . 81 



Pineal gland 424 



Pipes broken by frost 35 1 



Piston 102 



PLANTS collect dew. . . . 208 

 deleterious in bed- 

 rooms 405 



grow out of walls 316 



Plaster of Paris 426 



of stoves falls 



away .... 124 

 Plasterers cannot work 



in frost 359 



Platinum 261 



