282 



INDEX 



Condenser, auxiliary, Watson-Con- 1 

 rady, 105, 124 



Zeiss' aplanatic, 106 



Condenser, Substage, 102 



Abbe, 107 



Achromatic, 108 



Achromatic, 108, 109, 112 



and Abbe compared, 111 



To centre, 118, 145 



Choice of, 111 



Comparison of corrected and 



uncorrected, 111 



Dark ground, 183 



Focal length of, 108 



To focus, 118, 146 



with parallel light, 148 



for large objects, 109, 137 



Leitz' oil immersion, 109, 182 



Low-power illuminator, 107, 



109 



N.A. of, 108, 121 



Objectives as, 113 



Oil immersion, 109 



Power of, 109 



Swift's achromatic and para- 

 gon, 109 



Watson's universal and para- 

 chromatic, 109 



Confusion, Circle of, 64 



Connecting cells, Light-tight, 10 



Contrast in photomicrography, 161, 

 225, 253 



in prints, 229, 257 



Screens, 161 



for bacteria, 241 



for insects, 252 



Cooling troughs, 149 



Copper sulphate animoniacal solution, 



158 

 Correction Collars for Objectives, 



70 



Corrosive acetic fixing fluid, 263 

 Counterstains, 265 

 Cover-glass reflector, 195 



Thickness of, 69 



and tube length, 70 



Critical light, image, illumination, 



83, 114 

 and even illumination, 83, 



120, 123 



To obtain, 146 



Culture tubes, 246 

 Cycas revoluta, 261 



Dark ground condenser, 183 



illumination, 179 



Adjustment for, 186 



bacteria, for, 245 



Central stop for, 179 



high powers, for, 182 



instantaneous photomicro- 

 graphy, 247 



low powers, for, 182 



Monochromatic light for, 



187 



Objectives for, 187 



plate cultures for, 247 



Radiants for, 186 



Dark-room lamp, 235 

 Davis' iris diaphragm, 181 

 Daylight diffused. (See Sunlight) 

 Demonstration Eyepiece, 73, 247 

 Developers, 220 



Concentrated (Azol, Certinal, Ro- 

 dinal, Victol, 220, 269 



formulae, 268 



Hydroquinone, 221, 268 

 - Metolquinol, 221, 268 



Potass bromide in, 221 



Pyro Soda, 220, 269 



Rytol, 220 



Tabloid, 220 

 Development, 221 



factor, 216 



Factorial, 224 



papers, 228 



Stand, 223 



Tank, 132, 223 



Time, 222 

 Diaphragm. (See Stops) 



Auxiliary iris or bench iris, 106, 

 126, 148 



