<i^>^^/ X 



Foreword 

 Preface 



CONTENTS 



Page 



V 



vii 



SECTION I 



Some Observations on the Theory of Staining 



Dyes as Differentiators and Decolorizers .... 



Notes on the pH of Dyes in Aqueous Solution with Tables 

 showing their pH Values, Molecular Weights, etc. , 



Effect of Heat on pH of Aqueous Dye Solutions 



Some Observations on pH Changes Induced by Heating Dis- 

 tilled Water and London Tap Water .... 



Classification of Dyes Used in Microscopy 



The nature of acid, basic, amphoteric, neutral and compound 



dyes ..... 

 Classification by molecular weight 

 Acridine dyes 

 Anthraquinone dyes . 

 Azin dyes 

 Azo dyes 



Diphenylmethane dyes 

 Natural colouring matters 

 Nitro dyes 

 Nitroso dyes 

 Oxazine dyes 

 Stilbene dyes 

 Thiazine dyes 

 Triarylmethane dyes 

 Xanthene dyes . 

 Fuchsinic acid dyes 



xi 



10 



i6 



28 



29 



30 

 33 

 36 



37 

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42 



54 



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57 



59 

 60 



62 



63 



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74 

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