236 



INDEX. 



of, 170; stage for, 65 ; thickness of 

 cover-glass for, 170. 

 Shellac cement, preparation of, 179; re- 

 moval from lenses. 58. 

 Sight, injury or improvement in micro- 

 scopic work, 59. 

 Significance of aperture, 20. 

 Silk, examination of, 90. 

 Simple microscope, see under micro- 

 scope, 1. 

 Slides, 140; cleaning, 140. 

 Slips, 140. 

 Slit mechanism of micro-spectroscope, 



121. 

 .Society screw, 62. 



Sodium, lines and spectrum, 122, 123. 

 Solar spectrum or s. of sunlight, 122. 

 Soluble cotton, 176. 

 Solution, alum, 175 ; Farrant's, 177. 

 Spectral, colors, 123; ocular. 120, 126. 

 Spectroscope, direct vision, 120. 

 vSpectroscopic ocular, 24, 1 20. 

 .Spectrum, 122 ; absorption, 123 ; amount 

 of material necessary and its proper 

 manipulation, 130 ; analysis, 135 ; 

 Angstrom and Stokes' law of, 113 ; 

 banded, not given by all colored 

 objects, 133; of blood, 131 ; of car- 

 bon monoxide hema»lobin, 133 ; of 

 carmine solution, 133 ; of colored 

 minerals, 134 ; of colorless bodies, 

 134; comparison, 128; complemen- 

 tary, 124 ; continuous, 123; double, 

 128; incandescence, 123; line, 123; 

 met-hemaglobin, 133 ; monazite 

 sand, 134 ; nitrate of uranium, 135 ; 

 oxy-hemaglobin, 132 ; permanganate 

 of potash, 131 ; single-banded of he- 

 maglobin, 132 ; sodium, 122. 123 ; so- 

 lar, 122, 123 ; two-banded of oxy-he- 

 maglobin, 132. 

 .Spherical aberration, 4; test for, 210. 

 Stage, 61 ; mechanical, 6t, 65, 66; mi- 

 crometer, 94 ; for serial sections, 65. 

 Stain, alcoholic, 161 ; aqueous, 161. 

 Staining cells, 155 ; sections. 1 6 r , 167. 

 Stand, of microscope, 61 ; for laboratory 



microscope, 61. 

 Standard distance (250 mm.) at which 



the virtual image is measured, 97. 

 Starch, examination of, 90 

 Stokes and Angstrom's law of absorption 



spectra, 123. 

 Storing preparations, 171. 

 Substage, 67. 



Substances for crystallography, 181. 

 Sulphonal with polarizer, 139. 

 Sulphuric ether, 177. 

 Swaying of image, 46. 

 System, back, front, intermediate, of 

 lenses, 10. 



Table, for immersion fluid, 213 ; of mag- 

 nification and valuation of ocular 

 micrometer, 99 ; of tube- length and 

 thickness of eover-glassts, 15 ; 

 natural sines, third page of cover ; 

 of weights and measures, second 

 page of cover ; of numerical aper- 

 uire, 20 ; record , for photo-microg- 

 raphy, 204 ; size of fields, 28 ; of val- 

 uations of ocular micrometer, 99. 



Temporary mounting, 146. 



Terminology of objectives, 11. 



Test of chromatic and spherical aberra- 

 tion, 210. 



Tester, cover-glass, 144, 145 ; for homo- 

 geneous liquids, 55. 



Testing a cameia, 185; ink. 216; a mi- 

 croscope and its parts, 60. 



Test-plate, Abbe's, method of using, 210. 



Textile fibers, exaininatu n of, 90. 



Thickness of cover glass for non-adjust- 

 able objectives, table, 15; of serial 

 sections, 170. 



Tissues, arranging for sections, 168 ; fix- 

 ing or hardening, 157, 164. 



Tolles-Mayall mechanical stage, 65. 



Transections, 169. 



Transfering drawings, 217 ; sections, 160. 



Transmitted lisjht, 35. 



Transparent objects having curved out- 

 lines, relative position in microscop- 

 ic preparations, 83. 



Triplet, achromatic, 7. 



Tripod, 7 ; as focusing glass, 19S. 



Tube of microscope, Frontispiece. 



Tube-length, 14-16, 54; for cover-glass 

 adjustment, 53, 54 ; importance of, 

 53. 54 ; microscopical, 14, 15 ; of 

 various opticians, table, 15 ; and op- 

 tical combinations, 104. 



Turn-table, 14S. 



U— V— W-X 



Unadjustable objectives, 13. 



Under-correction, 5. 



Unit of measures, in micrometry, 100 ; 

 of wave length, 129. 



Uranium nitrate spectrum of, 135. 



Usago paper, 160. 



Valuation of ocular micrometer, 102, 

 103 ; table, 99 



Variable objective, 13. 



Varying magnification of compound mi- 

 croscope, 97. 



Varying ocular micrometer valuation, 

 105. 



Velocity under microscope, 88. 



