INDEX. 



A. 



ABBE'S researches, 1 14 



apertometer, 235 



Absorption bands, 253 



Acarus domesticus, 135 



farinse, 135 



Accessories, 58 



Accommodation depth of eye, 114 



Acetic acid, 312 



and glycerine, 320 



Acheta domestica, 170 



Acremonium alternatum, 144 



Actinic and visual foci, 210 



correction for, 212 



Actinozoa, 160 



Adiantum capillus Veneris, 142 



Adjustment of covering glass, 112 



>Esculus hippocastanum, 108 



Air-pump, 260, 304 



Air-bubbles, elimination of, 304, 307 



Alcohol, 313, 316 



Algse, 132, 272 

 Alkalies, 312 



Althea rosse, pollen of, 107 

 Alum bath for negatives, 223 

 American clips, 298 



oculars, 43 v 



Amici prism, 72 

 Ammonia, 313 



picrate of, 264 



Ammonio-sulphate of copper, 96, 216 



spectrum of, 253 



Amphipleura pellucida, 103, 118 



photographing, 220 



Amphiprora alata, 141 

 Amplifying power of objectives, 53 

 Analysing prism, 239 



for eye-piece, 240 



Animalcules, 133 



Animal sections, staining, 265 



tissues, hardening, 191 



preparing, 190 



section-cutting, 193 



Anuraea longispina, 134 

 Apertometer, Abbe's, 234 

 Apertures, measuring, 56, 234 



numerical, 125 



'Table of, 126 



value of wide, 123 



Aplanatic lenses, 106 



Apparatus for collecting mosses, 154 



Arachnida, 135 



Arachnoidiscus Ehrenbergii, 140 



Aregma bulbosum, 144 



Argulus foliaceus, 136 



Arranged slides of Diatoms, 291, 294 



Foraminifera, 294 



Polycistina, 294 



Artificial star test, 102 

 Asellus vulgaris, 136 

 Aspergillus alternatus, 144 



glaucus, 144 



Astromma Aristotelis, 155 

 Athyrium filix fsemina, 142 



BACILLARIA PARADOXA, 141 

 Baker's treatise on the Microscope, 2 

 Balsam angles, 123 



and benzol, 322 



mounting in, 299 



mounting in, 297 



Bangia fuscopurpurea, 133, 272 

 Barbadoes rock, 151 

 Beck's "Economic Stand," 36 

 "International," 14 



vertical illuminator, 75 



Bedding agents, 188 



