Vlll 



INDEX. 



PAGE 



Slow Development 96 



Sodic Carbonate, Solution. ... 62 

 Sodic Hyposulphite, Solution 



for Fixing 63 



Solution for Clearing Negatives 63 

 Solution for Reducing Nega- 

 tives, 63 



Solutions, Carbonates for De- 

 velopment 62 



Solutions for Photographic Op- 

 erations 61 



Solutions for Platinotype 64 



"Spot Lens" , 174 



Squeegee 58 



Squeegee for Removing Hypo 



from Prints 119 



Standard Light for Bromide 



Printing 123 



Sternberg, his Work 15 



Stock of Dry-Plates, List of. .. 68 



Stop for A. Pellucida 172 



Stopping Down Objective 76 



Stops for Black Grounds 174 



Stops in Objectives 76 



Strain of Objective 75 



Stretch Required for Camera. . 52 



Student's Stands 26 



Subjects, Difficult, Treated by 



Orthochromatics 109 



Substage, Importance of 22 



Substage Condenser, "fitted". 36 

 Substage Condenser, Use of. . . 69 



Substage Condensers 33 



Sulpho-pyrogallol, Berkeley. . 61 

 Sunlight, Advantages and Dis- 

 advantages of 18 



Sunlight, Uncertainty of 39 



Sunlight as Radiant 39 



Superiority of Apochromatics 85 



Surface to Focus Upon 52 



Swift & Son's Microscope 24 



Swift's Multiplex Condenser. .. 36 



Swift's Oil Lamp 45 



Swift's Photo- Micro Apparatus 48 



Swift's Safety Spring 26 



Tables of Enlargement and 



Reduction 180, 181 



Tailfer Patent, The 106 



Tanks for gases 44 



Tanks For Gases 161 



Temperature, Equability of in 



Work-room 19 



Test Diatoms, How to Treat.. 171 

 Test Diatoms, Yellow Mount- 

 ing 110 



Test For " Safe " Light 56 



Test Hairs, To Photo ... 84 



Test Objects, Opticians' 31 



Testing Lenses, Advice to 



Beginner in 32 



Tests for Objectives 31 



Thickly-coated Plates, Use of. 67 

 To Treat Very Opaque, or Non- 

 Actinic Subjects 94 



Toning, Rationale of 115 



Toning Albumen Paper 118 



Toning Bath for Albumen 



Paper 118 



Toning Bath for Aristotype 



Paper 122 



Toning Bath for Gelatine 



Chloride Paper 121 



Toning Solutions for Albumen 



Paper... .' 64 



Toning Wet Collodion Slides. . 149 



Traflteferotype Paper 127 



Truan Y. Luard, Diatom Pho- 

 tos 13 



Truan & Witt, Their Mirror. . . 40 



Tube Correction 85 



Turmeric, for Screens 109 



Under-exposure, to Rectify 97 



Uneven Lighting * 104 



Varnishing Negatives 102 



Vertical Illuminator, Beck's.. 171 

 Vibration, Fatal to Success. ... 18 



Vibration, to Obviate 18 



Vignetting Enlargements 142 



Violent Contrasts, How to 



Treat 95 



Visual and Actinic Rays 40 



Vogel, Color-Sensitive Plates. . 106 

 Walmsley, Focusing Surface. . . 53 



Washing Albumen Prints 119 



Washing Machines for Prints. . US 

 Washing Paper Before Toning 118 



Washing Plates 101 



Washing Trough 58 



Water Supply... 



Water Tap, Adjuncts to 57 



Wave-lengths 42 



Webster, G. W., Citrates 98 



Wedgewood 12 



Wellington,]. B., His Screen. 109 

 Welsbach Burner as Radiant... 39 



Wenham.. 15 



Wenham's Parabolic Illumin- 

 ator 175 



Wet Collodion, Chemicals Re- 

 quired for 60 



Wet Collodion, Fixing 148 



Wet Collodion, Intensification 148 

 Wet Collodion, Iron Ammo- 

 nio-sulphate Developer 148 



