CONTENTS.

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Preface to the Fourth Edition vii
Collection of Samples 1
Quantity of Water Required for Analysis 1
Bottles 1
Time Interval between Collection and Analysis 2
Representative Samples 3
Physical Examination 4
Temperature 4
Turbidity 4
Turbidity Standard 4
Platinum Wire Method 5
Turbidimetric Method 7
Coefficient of Fineness 8
Color 9
Comparison with Platinum-Cobalt Standards 9
Comparison with Glass Disks 10
Comparison with Nessler Standards 10
Lovibond Tintometer 11
Odor 12
Cold Odor 12
Hot Odor 12
Expression of Results 12
Chemical Examination 14
Expression of Results 14
Forms of Nitrogen 15
Ammonia Nitrogen 15
Determination by Distillation 15
Measurement of Ammonia Nitrogen 16
Comparison with Ammonia Standards 16
Comparison with Permanent Standards 17
Modification for Sewage 18
Determination by Direct Nesslerization 19
Albuminoid Nitrogen 73
Specific Gravity 74
Moisture 74
Volatile and Fixed Matter 74
Total Organic Nitrogen 74
Ether-Soluble Matter 75
Ferrous Sulfide 76
Biochemical Oxygen Demand 76
Analysis of Chemicals 77
Reagents 77
Sulfate of Aluminium 78
Insoluble Matter 78
Oxides of Aluminium and Iron 78
Total Iron 79
Ferric Iron 79
Ferrous Iron 80
Basicity Ratio 80
Lime 80
Sulfate of Iron 81
Insoluble Matter 81
Iron as Ferrous Sulfate 81
Acidity 81
Soda Ash 82
Insoluble Matter 82
Available Alkali 82
Chemical Bibliography 82
Microscopical Examination 89
Microscopical Bibliography 91
Bacteriological Examination 92
Apparatus 92
Sample Bottles 92
Pipettes 92
Dilution Bottles 92
Petri Dishes 92
Fermentation Tubes 92
Materials
                                                                                                                                                                                                                                                                                                           

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