INDEX 



Abbe condenser, 107 

 Achromatic, 108 



and corrected condensers com- 

 pared, 111 



Numerical aperture, 107, 111 



Prof., and Apochromatic objec- 

 tives, 53 



Prof., and Numerical aperture, 60 



test plate, 57 

 Aberration, Chromatic, 48 



Spherical, 47 



Zonal, 51 



Absorption bands, spectra, 154 



diagram, 159 



of stains, 267 



Acetic-alcohol fixing fluid, 264 

 Acetylene lamps, 96 

 gas purifier, 97 

 Achromatic eyepiece, 74 



objective, 52 



improved objective, 54. 



(See also Objective and condenser) 

 Actinometer for tricolour positives, 



206 



Adinoptyclius heliopelta, 255 

 Adapters for dark slides, 6 

 Adjustment, coarse, 31 



Fine, 2. (See Fine adjustment) 

 Adon telephoto lens, 140 

 Ammoniacal copper sulphate solu- 

 tion, 158 



Ammonium bichromate sensitising 

 solution, 273 



persulphate reducer, 271 

 Amphipletira pellucida, 257 



resolution by oblique light, 



177 



Amphiplewra pellucida test object, 

 as, 178 



Anastigmat lenses, 130 



Angstrom units, 158 



Aniline blue, 265 



Animal sections, 257 

 ! Aperture. (See Numerical aper- 

 ture) 



Aplanatic cone, 102 



condenser, 105 

 - lens, 52 



Apochromatic condenser, 110 



objective, 53. (See objective) 

 Apparatus, Sets of, 277 

 Applications of photomicrography, 



238 



Aquarium cement, 276 

 Arachnoidiscus ehrenberghii, 254 

 Arc lamp, 85 



- for alternating current, 86 

 Automatic, 87 



- Baker's, 88 

 candle power, 86 



carbons, 89 



Connections for, 89 



Current for, 85 



Enclosed, 89 



- Hand feed, 88 



- Liliput, 7, 88 



- Small, 86 



Zeiss 1 5 ampere, 87 

 Ascaris, Developing egg of, 262 

 Autochrome plate, 210 



development, 274 



extra sensitised, 213 



Auxiliary condenser. (See Condenser) 

 Azol, 269 



279 



