Index 



327 



Peat, 66, 238 



Pectase, ferment enzyme, 2l6 



Pectic acid, 216, 290 



Pectin, 216 



Pectocelluloses, 90 ; how distin- 

 guished from mucocelluloses, 215; 

 general characteristics, 217 ; flax, 

 217 (which see] ; China grass or 

 Ramie, nettle fibres, monocoty- 

 ledonous fibre aggregates, 220 ; 

 parenchymatous tissue of fruits, 

 221 ; mucilaginous constituents 

 of plant tissues, quince mucilage, 

 221 ; salep mucilage, 223 ; amy- 

 loid, lichenin, 224 ; carragheen 

 mucilage, 225 ; general methods 

 of investigation, 267 



Pectose, 90, 216 



Pentaglucoses, 93, 262 



Pentosans, 93, 185, 186 



Pentoses, 86 



Phloroglucinol, action on jute, 115, 

 192 



Phormium, 220 



Powders, smokeless, 309 ; sporting, 



309 



Printing processes, 294 

 Pseudocarbons, 70 

 Pseudocelluloses, 87 

 Pyrocatechol, from woods of Coni- 



ferse, 198 



Pyrocatechuic acid, 198 

 Pyroxylins, 39 



QUINCE mucilage, 221 



RAMIE, 220 



Retting, 67, 80, 234, 277 

 Rhea. See China grass 

 Rot-steep, 67 



SACCHARIC acid, 261 

 Salep mucilage, 223 

 Schultze's reagent, 173 

 Scutching, 80 



Silk, Dr. Lehner's artificial, 45, 308 



Skeletonising, process of, 66 ; a 



simple means of differentiation, 67 



Spinning processes, 279 



Stability of nitrocelluloses, 317 



Stearocutic acid, 230 



Straws, cereal, behaviour in thio- 

 carbonate reaction, 164 ; wood 

 gum in, 187 



Suberin, 228, 231 



Suberose, 228, 231 



Sugar cane, 220 



Sugars, 65 ; cane sugar first assimi- 

 lated, and probable immediate 

 mother substance of cellulose, 72 



TEXTILES, analysis of, 271 

 Thiocarbonate of cellulose, 25, 318. 



See also Cellulose 

 Tissue-substance, first step in 



building-up of, 74 

 Tunicin, 87 



VARNISHES, collodion, 44 

 Vasculose, 90 

 Viscose, 25, 247, 318 



WEENDE method, 165 



' Willesden ' goods, 13 



Wood-gum, 187 



Woods, 91 ; structural elements, 

 172 ; Fremy's classification, 173 ; 

 general property to form hydrogen 

 peroxide, and estimation of 

 mechanical wood-pulp in papers, 

 174 ; empirical composition, 174 ; 

 tables, 75 ; proximate analysis 

 table, 175 ; resolution into cellu- 

 lose and non-cellulose, 177 ; dis- 

 cussion of Sachsse's view that 

 lignocelluloses are the products of 

 metabolism of cellulose, 178 ; 

 estimation of furfural (table), 182; 

 de Chalmot on life-history of 

 woods, 182 ; wood gum, 184, 

 187 ; in cereal straws, 187 ; 

 analyses, 188 ; methoxyl deter- 

 minations, 1 88, 189 ; acetic 

 residue, 191 ; destructive dis- 

 tillation, 192 ; chlorination of 

 wood lignocelluloses, dicotyledo- 



