INDEX. 



233 



Mirror, 10, 11 ; for Abbe illuminator, 46 ; 

 of camera lucida, arrangement lor 

 drawing, 112; concave, use of, 36; 

 dark-ground illumination, 47 ; light 

 with, central and oblique, 39 ; light- 

 ing with, 36 ; plane, use of, 36. 



Mixture, clearing, 176. 



Moist chamber, 15 r. 



Molecular movement, 88. 



Monazite sand, spectrum of, 134. 



Mono-refringent, 137. 



Mounting, cells, preparation of, 14S ; me- 

 dia and preparation of, 175- 79 ; ob- 

 jects for polariscope, 137 ; perma- 

 nent, 147 ; temporary. 146. 



Mounting objects, dry in air, order of 

 procedure, 147 ; in glycerin, order of 

 procedure, 149; in glycerin jelly, or- 

 der of procedure, 150; in media mis- 

 cible with water, 149 ; minute ob- 

 jects, 1S0; permanent, 147 ; in resin- 

 ous media, 152 ; in resinous media, 

 by drying or desiccation, order of 

 procedure, 152 ; in resinous media, 

 by successive displacements, order 

 of procedure, 153 ; temporary, T46. 



Movement, Browuian, or molecular, S8. 



Muscae volitantes, 90 



Muscular fibers, isolation of, 155. 



N 



Natural balsam, 176. 



Needle-holder, 146. 



Negative, aberration, 52 ; development 

 of, 196 ; labeling and care of, 197 ; 

 marking. 197 ; oculars, 22 ; rack for 

 dr) ing, 203. 



Net-micrometer, 113. 



Neutral balsam, 176. 



Nicol prism, 136. 



Nitrate of uranium, spectrum of, 135. 



Nitric acid, dissociator, 179. 



Nomenclature of objectives, 11 



Non-achromatic condenser, 44 ; object- 

 ives, 12. 



Non-adjustable objectives, 13 ; thickness • 

 of cover glass for, table, 15. 



Normal salt .solution, 179. 



Nose-piece, 9, 27 ; marking objectives \ 

 on, 65. 



Numerical aperture of condenser, 43 ; ob- ! 

 jectives, 17, 212 ; table of, 20; reso- 

 lution and, 21. 



Object, determination of form, 83 ; hav- 

 ing plane or irregular outlines, rela- 

 tive position in a microscopical prep- 

 aration, 82 ; and image, size of, 5, II, 

 96 ; marking parts of, 63, 64 ; mi- 



crometer, 94 ; mounting, 146 ; put- 

 ting under microscope, 27 ; shading, 

 56 ; suitable for photo-micrography, 

 191 ; transparent with curved out- 

 lines, relative position in microscopic 

 preparations, 83. 



Objective, 7, jo ; achromatic, 10, 12, 195 ; 

 adjustable, 12, 13, 52 ; adjustable, ex- 

 periments, 51 ; adjustable, microm- 

 etry with, 106 ; adjustable, photo mi- 

 crography with, 201 ; adjustment for, 

 51 ; aerial image of, 30 ; auastigmat, 

 196 ; aperture of, 21, 22, 212 ; apla- 

 natic, 12 ; apochromatic, 12, 189 ; 

 back combination of, 12 ; cleaning 

 back lens of, 58 ; collar, graduated 

 for adjustment, 53 ; cloudiness or 

 dust, how to determine, 82 ; desig- 

 nation of, 11 ; dry, ii, 17-19 ; equiv- 

 alent focus of, 11, 26, 214; field of, 

 28, 29 ; focusing for micro-spectro- 

 scope, 130; front combination of, 10, 

 1 1 ; function of, 29, 30 ; glass for, 

 11-13, 63 ; high, focusing with, 37 ; 

 homogeneous immersion, 17-19; ho- 

 mogeneous immersion, cleaning, 56; 

 homogeneous immersion, experi- 

 ments, 51, 55 ; illuminating, 14 ; im- 

 age, power of, 19; immersion, 12 ; 

 index of refraction of medium in 

 front of, 17, 18 ; inverted, real image 

 of, 29 ; for laboratory microscope, 61 ; 

 lettering, 11 ; light utilized with, 18 ; 

 low, attached directly to camera, 198; 

 low, focusing with, 36 ; magnifica- 

 tion of, 214 ; marking, by Krauss' 

 method, 65 ; to use with micro-polar- 

 iscope, 136 ; microscopic, 10 ; to use 

 with micro-spectroscope, 130 ; for 

 micro-spectroscope, focusing, 130 ; 

 nomenclature of, 11 ; non-achromat- 

 ic, 12 ; non-adjustable, 13 ; non-ad- 

 justable, thickness of cover-glass for, 

 table, 15 ; numbering, 11 ; numeri- 

 cal aperlure, 21, 22, 212 ; oil immer- 

 sion, 12; panto- chromatic, 13 ; para- 

 chromatic, 13 ; perigraphic, 196; for 

 photo-micrography, 189; projection, 

 14, 195; putting in position and re- 

 moving, 26 ; semi-apochromatic. 13 ; 

 table of field, 28 ; terminology of, 11 ; 

 unadjuslable, 13 ; variable, 13 ; vis- 

 ual and actinic foci of, in photo-mi- 

 crography, 189 ; water immersion, 

 I7 _I 9. 55 J experiments, 51 ; work- 

 ing distance of, it, 33, 38. 



Oblique light, 35, 39 ; with Abbe illumi- 

 nator, 46 ; experiments, 39, 46 ; with 

 a mirror, 39. 



Ocular, 22 ; achromatic, 23 ; Airy's, 23 ; 

 aplanatic, 12, 23 ; binocular, 23 ; 

 cloudiness, how to determine and re- 



