Oil brown D, 77, 252, 264 

 Oil red AS, 0, B or SB, 86 

 Oil red 4B. 77, 88, 253, 265 

 Oil red O, 76, 88, 253, 265 

 Oil red IV, 87 

 Oil scarlet, 76 

 Oil Vermillion, 78 

 Oil yellow, 99 

 Oil yellow D, 71 

 Oil yellow 11, 71, 252, 262 

 Orange I, 82, 253, 264 

 Orange II, 83, 253, 264, 298 



absorption curve of, 74 

 Orange III, 81 

 Orange IV, 82, 253 

 Orange A, P, or R, SS 

 Orange extra, 83 



Orange G, 10, 12, 14, 34, 49, 63, 72, 

 83, 89, 131, 132, 170, 189, 216, 

 222, 241, 252, 263, 296 



absorption curve of, 59, 74 

 Orange GG, GMP, 72 

 Orange MNO or MN, 80 

 Orange N, 82 

 Orange R, 99 

 Orange RR, 76 

 Orange S, 85 



Orcein, 66, 170, 216, 259, 282, 327 

 Orseillin BB, 90, 253, 266 

 Oxazins, 117-125 



Parafuchsin, 147 



Paraleucaniiin, 140 



Paramagenta, 147 



Pararosanilin, 147 



Paris blue, 166, 237 



Paris violet, 157 



Patent blue V, 170, 255, 276 



Patent blue, VF, 170 



Phenazines, 29, 125 



Pheno-safranin, 128, 257, 270 



Phenol red, 200, 205 



Phenolphthalein, 200, 206 



Phenolphthalein and the sulfonphtha- 



leins, 197-206 

 Phenyl-methane dyes, 137-175 

 Phenylene blue, 124 

 Phenylene brown, 90 

 Phloxine, 133, 185, 195, 256, 279 

 Phloxine B, 195, 256, 323 



absorption curve of, 194 

 Phloxine BB, BP super, N, RB, TA or 



TB, 195 

 Phosphine, 209, 257, 280 

 Phosphine 3R, 209 

 Physical theory of staining, 44 

 Phytolacca, 10 

 Picric acid, 30, 34, 66, 162, 165, 168, 



214, 222, 252, 262 

 Pigments, mineral, 237 

 Pinacyanol, 35, 232, 257, 285 



Plant tissue, staining of, 104, 115, 129, 



139, 141, 143, 153, 162, 164, 192, 



219 

 Pollen tubes, staining of, 68, 71, 80, 



81, 120, 143 

 Polychrome methylene blue, 113 

 Ponceau B, 89 



"Ponceau de xylidine", 73, 74, 75, 77 

 Ponceau S, 89, 253, 266 

 Ponceau 2R, 77, 252, 263 

 Ponceau 6R, 99 

 Ponceau FR, G, W, GR, J, NR, R, 



RG, 2RE, 11 

 Pontacyl blue black SX, 85 

 Pontacyl brilliant blue V, 170 

 Pontacyl green S, 175 

 Poniamine black E, EX, or EXX, 97 

 Pontamine sky blue 5BX, 97 

 Pontamine sky blue 6BX, 97 

 Pontamine violet N, 99 

 Primula R water soluble, 155 

 Primulin, 230, 257, 285 

 Primulin yellow, 230 

 Principal uses of the most important 



stains, 262-285 

 Proflavine, 208, 257, 280 

 Prontosil, 81, 264 

 Prontisil red, 81 

 Protozoa, staining of, 72, 78, 84, 92, 



95, 109, 119, 121, 167, 225 

 Prune pure, 119 

 Prussian blue, 237, 259 

 Purpurin, 227, 259, 284 

 Pyoktanin yellow, 139 

 Pyoktaninum aureum, 139 

 Pyoktanium coeruleum, 156 

 Pyronin(s), 177-180 

 Pyronin B, 33, 35, 167, 180, 256, 277, 



325 

 absorption curve of, 179 

 Pyronin G, 33, 178 

 Pyronin Y, 35, 178, 256, 277, 324 



absorption curve of, 179 

 Pyrosin B, 193 

 Pyrosin J, 192 



Quinalizarin, 227, 259, 284 

 Quinoline dyes, 232 

 Quinone-imine dyes, 101-135 



Red ALS salt, 234 



Red B, 76 ^ 



Red corallin, 173 



Red 3GS salt, 233 



Red violet, 155 



Relation of molecular structure to 



color, 25-27 

 Renol black G, 97 

 Resazurin, 124, 258, 270 



absorption curve of, 118 

 Resorcin blue, 120, 258, 259 

 Resorufin, 124 



305 



