314 



THE USE OF THE MICROSCOPE 



Submicroscopic objects, 100, 101 

 Substage, large centering, 204 

 Surirella gemma, in agai", 234 



in air, 234 



in hyrax, 235 



test for water-immersion objec- 

 tive, 134 

 Swan cube, 23, 202 



Test, focal, for condenser, 249 



object,>centering with, 126 



plate, Abbe, 112, 260 



ring, for condenser, 89, 250 



slide, Moeller, 43 



star, 173, 257 



for water-immersion objective, 134 

 Testing, microscope, 171 



nosepiece, 268 

 Tests for correction of objective, 122 

 Tissue cultures, 240 

 Tomopteris, chromosomes, 238 

 Tradescantia virginiana, chromo- 

 somes, 229 

 Triplet, defined, 14 

 Triticum, chromosomes, 229 

 Trypanosomes, smear, 239 

 Tube length, adjusting, 258 



for oil-immersion objective, 113 



changing. 111 



increasing in binocular, 113 



of monobjective binocular, 49, 51 

 Tulipa, nodes of bivalent chromo- 

 somes, 223 

 Tumors, chromosomes of, 238 



U 



Ultra-violet photography, 168 

 Under-correction of condenser, 89, 

 91 



of objective, 121 

 Uvularia, reduction divisions, 223 



segmented chromosomes, 219 



Vertical illuminator, with semisil- 

 vered cube, 265 



Vessels and fibers, separated, 231 

 Vorticella, water-immersion objec- 

 tive, 240 



W 



Water, mounting in, 102 

 objects in, 255 



Water-immersion, objective, 131 

 future of, 207 

 precautions, 133 



Watson and Sons, achromatic con- 

 denser, 201 

 booklet of instructions, 209 

 compensating eyepieces, 148 

 dry achromatic condenser, 160 

 holoscopic condenser, 176 

 rotation of nosepiece, 141, 181 



Watmn's Microscope Record, 73, 213 



Wenham, correction collar, 198 



Wilson, the 120 objective, 118 



WoUaston, doublet, 197 



Wratten book on photograph}', 77 

 films, 75 



light filters, 78, 212 

 neutral screens, 78 

 screens with aspheric condenser, 

 85 



X 



Xylol, for condenser, 154, 177 



Y 



Yeast, nuclei, 235 

 Yellow-green light filters, 75 



Z 



Zeiss, booklet of instructions, 209 

 centered condenser sleeve, 139 

 centering ring, 126, 140, 158 



for condensers, 205 

 condenser, achromatic oil-immer- 

 sion, 201 

 diaphragms for twin objectives, 43 

 doublets and triplets, 197 



