214 INDEX. 



PAGE 



Plastics 12, 26-38 



Plaster boiled by steam 36 



, hardened 37, 38 



Platinizing glass, &c ; 79 



Platinoid metals 61 



Platinum sand, solution of 61 



alloys 66 



Plating by dipping 72 



Porcelain, structure and composition of 30 



, colors for 32, 33 



cement 155 



Portable blast furnace. 20 



Pottery 29-33 



Potash, new source of 101 



tested for soda 101 



Preservation of food 189 



Printing ink 144 



Prussiate of potash, yellow and red 109, 110 



, red 140 



Prussian blue, for calico 142 



Prussic acid, anhydrous 121 



Pungernite 18 



Pyrotechny 22-25 



Pyrometallurgy 40-69 



Pyrotartaric acid 121 



QUAKTATION 57 



Quinin and quinoidin 117 



Ekd prussiate of potash 140 



Reflectors 171 



Resin, Dammara 152 



Eeverberatory furnace 20 



Rhubarb, red dye from 136 



Rocks, disintegration of, to form soils 195 



Rosin, or common resin 152 



gas , 166 



Roses, oil of 164 



Ruby glass 27 



Rubiacin and rubiacic acid 134 



Rue, oil of. 163 



Salt, common 97 



, as manure 193 



Saltpeter 102 



Sand paper 165 



Sandal wood , 164 



Saponification 162-165 



