2 7,0 



INDEX. 



E 



Eccentric diaphragm, 42, 48. 



Embryograph, 119. 



Engraving glass for bull's eye condenser, 

 198. 



Erect image, 1. 



Equivalent focal length, 11, 214 ; focus of 

 objectives, n, 26, 214 ; focus of ocu- 

 lar, 26, 214. 



Elements, histological, isolation of, 154. 



Eosin, 177. 



Ether, sulphuric, 177. 



Ether-alcohol, 177 ; saturated with, 157. 



Ethylic alcohol, 175. 



Examination of dust of living rooms, 

 bread crumbs, corn starch, fibres of 

 cotton, linen, silk, human and ani- 

 mal hairs, potato, rice, scales of but- 

 terflies and moths, wheat, 90. 



Experiments, Abbe illuminator, 46 ; with 

 adjustable and immersion objectives, 

 51 ; compound microscope, 26 ; crys- 

 tallography and micro chemistry, 

 180 ; homogeneous immersion ob- 

 jective, 55 ; lighting and focusing, 

 36 ; in micro-chemistry, 1S0 ; with 

 micro-spectroscope, 131 ; with micro- 

 polariscope, 137 ; i'l mounting, 146— 

 161 ; photo-micrography, 193; simple 

 microscope, 6. 



Exposure of photographic plates, 194, 

 199, 200, 203. 



Extraordinary rav of polarized light, 136. 



Eye and microscope, 1, 6, 10, 31. 



Eyes, care of, 58; muscae volitantesof, 90 



Eye-lens ot the ocular, 22. 



Eye-piece, 22 ; micrometer; 102. 



Eye-point, 7, 22, no ; of ocular, demon- 

 stration, 32. 



Eye-shade, Ward's, 59 ; double, 59. 



Farrant's solution, in mounting objects, 

 151 ; preparation of, 177. 



Feather, examination of, 90. 



Fibers, examination of, 90 



Field, 27 ; with camera lucida, 95 ; illu 

 mination of, 44, 49 ; with orthoscopic 

 ocular, 23 ; with periscopic ocular, 

 24 ; of view with microscope, 27, 29, 

 93, 109 ; size of, with different object 

 ives and oculars, 27, 29 



Field-lens, of ocular, 22 ; action of, 31 ; 

 dust on, 82. 



Filar micrometer ocular, 23 ; ocular mi- 

 crometer, 103. 



Filter paper, Japanese, 57. 



Filters, light, 191. 



Filtering balsam, etc., paper funnel for, 

 175- 



Fine adjustment, Frontispiece ; testing, 

 60. 



Fir, balsam of, 175. 



Fixative, albumen, Mayer's, 175. 



Fixing, reagents for, 175 ; tissue, 157. 



Flame, image of, 43. 



Fluid, immersion, 55, 56 ; testing, 213. 



Focal distance, or point, principal, 30 ; 

 length, equivalent, ir. 



Focus, 6 ; always up, 38 ; actinic, 189 ; 

 chemical, 13 ; conjugate, 3 ; of ob- 

 jectives, equivalent, II, 26, 214 ; of 

 oculars, equivalent, 26, 214 ; optical, 

 13 ; principal, 3, 5 ; visual, 189 



Focusing, 6, 33 ; adjustments, testing, 60 ; 

 with compound microscope, 33 ; ex- 

 periments, 36 ; glass, 197-198 ; with 

 high objectives, 37 ; with low object- 

 ives, 36 ; objective for micro-spectro- 

 scope, 130 ; for photo micrography, 

 19;, 199, 2or ; screen for photo-mi- 

 crography, 194-195; with simple mi- 

 croscope, 31 ; slit of micro spectro 

 scope, 131. 



Form of objects, determination of, 83. 



Formal, 177. 



Formaldehyde dissociator, 177 ; for iso- 

 lation, 154. 



Formula for cataloging, 172. 



Fraunhofer lines, 123. 



Front combination or lens of objective, 

 10, 11. 



Frontal sections, 170. 



Function of objective, 29. 30 ; of ocular, 

 30. 



Funnel, paper, 175. 



Gauge, cover-glass, 143, 145. 



Gelatin, liquid, preparation of, 178. 



Geometrical construction of images, 5. 



Glass, cleaning mixture for, 145 ; focus- 

 ing, 197-198; ground, 29; for object- 

 ives, 12, 63 ; rod appearance under 

 microscope, S6, 87 ; slides or slips, 

 140. 



Glue, liquid, preparation of, 178. 



Glycerin, bottle for, 164; mounting ob- 

 jects in, order of procedure, 149, 177; 

 removal, 58. 



Glycerin jelly, mounting objects in, or- 

 der of procedure, 150; preparation 

 of, 177 



Gold size, removal from lenses, 58. 



Goniometer ocular, 23. 



Graduation of adjusting collar, 53. 



Grating, diffraction, 122. 



Ground glass, preparation of, 29. 



Gun cotton, 176. 



