308 



THE USE OF THE MICROSCOPE 



Fluorite, objectives, 124 



in apochromatic objectives, 200 

 Focusing condensers, 32 



objectives, 33 

 Foraminifera, living, 240 

 Fritillaria lanceolata, chromomeres, 



220 

 Fucus, antheridia, 231 



embryos, 232 



G 



Gage, book on the microscope, 209 

 daylight glass, 204 

 electric lamps, 73 

 Gage, for measuring covers, 111 

 Galileo, early microscope, 196 

 Galtonia candicans, chromomeres, 



218 

 Gelei, mounting in immersion oil, 12 

 Genes, visibility of, 216 

 Glare and large source, 68, 247 

 Glass, daylight, 76 

 for color filters, 75 

 ground, care of, 175 

 preparation of, 70 

 source of hght, 69 

 testing, 70, 171, 247 

 with uncorrected condenser, 252 

 matt, 70 

 opal, 70 

 Glossary, microscopical, 277 

 Grantia, living, 240 

 Greenough binocular {see Binocular, 

 twin-objective) 

 reflecting prisms, 43 

 GuUstrand, vision through micro- 

 scope, 48 



H 



Hartnack, water-immersion objec- 

 tives, 198 

 Hartridge, accessory lens, 11 

 acuity of vision, 77 

 bull's eye, 72 



compensating eyepieces, 148 

 condenser, corrected, 11 

 uncorrected, 84 



Hartridge, frosted glass, 1 1 



ground glass, 68 



for uncorrected condenser, 85 



illumination, 66, 67 



lamp distance, 11 



matt glass below condenser, 73 



opal glass, 70 



papers on large cones, 212 



slide thickness, 11 



source diaphragm, 67 

 Hemerocallis fulva, chromosomes, 



226 

 Heurck, van, amphfier, 143 

 High powers, manipulation, 194 

 Homal for photography, 143, 166 

 Hyacinthus orientalis, reduction divi- 

 sion, 223 

 Hypotheses, use of, 214 

 Hyrax as mounting medium, 104 



Illumination, methods of, 66 



practical points, 74 



summary, 73 

 Image, brightness of, 19 



defects in, 1 



injury to, causes of, 6 

 Image-field, 28 

 Immersion oil, brazilin in, 105 



care of, 179 



with condensers, 86 



mounting medium, 178 



objects in, 99 



with xylol, 104 

 India-ink drawings, 163 

 Iris, condenser, regulating, 92 



traversing and rotating, 205 

 Iron-acetocarmine preparations, 177, 



242 

 Iron-brazilin stain, 243 

 Ives, monobjective binocular, 52, 

 202 



Jena glass-works, colored glass, 77 

 new glasses, 199 



