166 



INDEX. 



Hartley's Process, 81 

 Heliostat, 33 

 Huyghenian Eyepiece, 24 

 Hyposulphite of Soda, 97 



Illumination, 124 

 Immersion Principle, 19 

 Incandescent Lamp, 38, 123 

 Insect Mounting, 57 

 Intensifying, 79, 100 



Latitude to Find, 36 

 Lamp for Dark Room, 51 

 Lamp, Parafin, 39 

 Lantern Enlarging, 159 

 Lenses, 5 



Magnifying Power, 14 

 Markings on Diatoms, 62 

 Media Mounting, 57, 58 

 Microscope, 25 

 Microtome, 64 

 Mounting Objects, 55 

 ,, Prints, 151 

 Morgan's Paper, 154 

 Muller's Fluid, 64 



Negative, Properties of, 145 

 Neutral Oxalate, 99 



Oblique Illumination, 120 

 Object Glass, 15 



Opaque Objects Photography, 119 

 Over-exposure, 146 



Paper, Sensitized, 149 

 Patent Plate Glass, 41 

 Penetration, 16 

 Petzval Portrait Lenses, 155 

 Photographing Horizontally, 128 

 Objects in Fluid, 



110, 121 



Photographing with 1 inch, 110 

 i inch, 120 

 I inch, 128 

 T6 inch, 136 



Potash Bichromate, 65 



Principal Focus, 6 



Printing, 149 



Production of Positives, 149 



Pyrogallic Acid, 84 



Real Foci, 6 

 Reflection, 4 

 Refraction, 4 

 Rutherford's Microtome, 64 



Scales of Moths, 55 

 Section Cutting, 64 

 Silver Nitrate, 87 

 Sodium Sulphate, 65 



,, Hyposulphite, 97 

 Spectrum, 11 

 Stage of Microscope, 26 

 Staining, 67 

 Stand for Apparatus, 43 

 Substnge, 32 

 Sun Light, 32 

 Swan's Lamp, 106 



Testing Solutions, 37 

 Thin Glass, 73 

 Toning, 150 



Undulatory Theory, 4 



Varnishing, 79 



Virtual Foci, 6, 7 



Visual and Chemical Foci, 14 



Wenham Object Glass, 15 



Wet Process, 75 



Window of Dark Room, 50 



Printed by H. K. Lewis, 136 Gower-st., London, W.C. 



