STAINING, PRACTICAL AND THEORETICAL 



Osmic acid, 7, 222, 263, 336-8, 423 

 Osmic acid for interstitial cells of 



testis, 336 

 Osmic acid - alphanaphthylamine - al- 



cian blue, 338 

 Osmic acid, rapid method for lipids, 



337 

 Osmic acid & Sudan black methods 



for interstitial cells of testis, relative 



merits of, 423 

 Osmium metal - alphanaphthylamine 



chelate, 339 

 Ossein, 108 

 Ossification, 126 

 Ossification, foetal, 127 

 Osteoid tissue, 169 

 Ostracod appendages, 265 

 OTAN differential staining method 



for normal & degenerating myelin, 



340 

 Owen's blue, pH, mol. wt., etc., 22 

 Oxalic acid, 465 

 Oxalic acid - aniline blue - phospho- 



molybdic acid, 360 

 Oxazine dyes, 23, 25, 40 ,60 

 Oxidase granules, 146, 313 

 Oxydianil yellow, 572 

 Oxidation - reduction reagents, 90 

 Oxyntic cells, 358 



Paget & Eccleston's stain, 122 



Palmgren's reducer, 418 



Pancreas, 59, 109-11, 191, 276, 280, 

 282-3, 285, 289, 291, 345-6, 365, 

 382-3 



Pancreatic islet cells & tumours, 345 



Paneth cell granules, 192 



Papanicolaou's OG6, 341 



Papanicolauo's stain EA 36 for vaginal 

 smears, 340—1 



Papain, 413 



Paraldehyde, 109, iii, 113, 116, 119 



Pappenheim - Unna carbol methyl 

 green - pyronin, recipe, 560 



Paraldehyde - new fuchsin for pan- 

 creatic islet cells & their tumours, 



345 



Paracarmine, 406, 563 



Pararosaniline, 20, 71, 244 



Paraffin liquid, refractive index, 568 



Paraffiin wax embedding & section pro- 

 cedure, 498 



Paraffin wax - pyridine, rapid method 



of dehydrating & embedding, 502 

 Parietal cells, 148 

 Paranitrophenol fixative, 483 

 PAS - aurantia - haemalum, 358 

 PAS - positive & negative substances, 



example of, 352-3 

 PAS reaction for polysaccharides, 118, 



130, 351 

 PAS - chrysoidin, 172 

 Pasini's stain for connective tissues, 



347 



Patent blue A, 20, 33, 71 



Patent blue AF54, 261 



Patent blue, leuco, 261 



Patent blue V, pH, etc., 21 



Patent phosphine, pH, etc., 19 



Pearse's PAS - celestin blue method 

 for pituitary glands, 355 



Pelomyxa, 16 



Penetrative power of dyes, 34 



Pepsin, 413 



Pepsin-forming cells, 197 



Pepsin - tryptophane content of, 193 



Pepsinogen cells, 148 



Pepsinogen granules, 147, 197 



Peptic cells, 358 



Peracetic acid - orcein - Halmi stain 

 for connective tissues, 348 



Percentage solution, dilutions to lower 

 percentages, 573 



Peridental membrane, collagenous ele- 

 ments, 414 



Periodic acid, 118-9, 130, 351, 391-2, 



Periodic acid oxidation, selectivity of, 

 362 



Periodic acid in the AUochrome 

 method, 130 



Periodic acid - Schiff reaction for poly- 

 saccharides, 351 



Periodic acid - Schiff reaction, mech- 

 anism of, 353 



Periodic acid - Schiff - aurantia - hae- 

 malum for gastric mucosa, 358 



Periodic acid - Schiff - celestin blue, 



355 _ 



Periodic acid - Schiflf- chrysoidin, 172 

 Periodic acid - Schiff - haematoxylin - 



aniline blue, 130 

 Periodic acid - Schiff, Ritter & Ole- 



son's reagents, recipes for, 563 

 Periodic acid - Schiff - aldehyde thio- 



nin - luxol fast blue, 122 



622 



