Schedule of Classification 



3020 



3030 



3040 

 3050 



3060 



3070 



3080 



Pyrometry. (See also 

 1255, 4200, 4202, 6080.) 275-285 

 Brightness ... 275-279 



Illuminating Power 275-276 

 Illumination. (See also 



Coast Lighting, 3090.) 276-278 



Gas Lighting 276-277 



Intensity ...... 278 



Photometry ... 279-284 



Electric Light Photometry 280 

 Photometers ... 281-283 



Bunseris Photometer 281-282 

 Spectrophotometry 283-284 



Units of Light ... 284-285 



Reflection and Refraction. 

 Refractometers. (See also 

 3800 ; Chemistry 7310.) 

 Refractive Indices 285-292 



Catoptrics and Dioptrics 285 



Prism ...... 286-287 



Reflection ...... 287 



Reflection and Refraction 287-288 

 Refraction ... 288-289 



Refractive Indices 289-291 



Determination of Refrac- 



tive Indices ... 289-290 



Refractive Indices of 



Various Substances 290-291 

 Refractometers ...... 291 



Spectrometry. Dispersion. 

 (See also 3800; Chem- 

 istry 7310.) ... 292-295 



Dispersion ...... 292-293 



Refraction and Dispersion 294 

 Refractive Indices ... 294 



Spectrometry ... ... 295 



Spectrometers ... ... 295 



Spectrum ...... 295 



Rays, General Theory of 295-298 

 Caustics ...... 296-297 



Optical systems. Cardinal 

 Points. Theory of Im- 



ages 

 Cardin 



298-300 

 298 

 299 

 300 



(Se 



inal Points 

 Optical Systems 

 Theory of Images 

 Mirrors and Lenses. 



also Astronomy 2040.) 300-306 

 Lenses ...... 301-303 



Systems of Lenses 302-303 



' Objectives ...... 303 



Mirrors ...... 303-305 



Magic Mirrors ...... 304 



Aberrations, Spherical and 

 Chromatic. Distortion, 

 etc. Achromatism 306-308 

 Aberration ... ... 306 



Achromatism .... 306-307 



Telescopes. Field-glasses. 

 (See also Astronomy 

 2040-2600.) ... 308-311 



3082 



3084 

 3085 



3090 



PAGE 



Telescopes ... 308-311 



Achromatic Telescopes 308 



Galileo's Telescope ... 309 

 Objectives ... 309-310 



Reflecting Telescopes 310 



Refracting Telescopes ... 310 



Field Glasses 311 



Microscopes. (See also 3650 ; 

 General Biology 0110; 

 Anatomy 0140.) 311-328 



Accessories". 311-315 



Camera Lucida 311-312 



Illuminators. (See also 



Illumination.) 312-314 



Illumina tors: Condensers 313-314 



Illuminators: Lamps ... 

 Micrometers and Micro- 



also 

 Ac- 



314 



314 



Fine Adjustment 316 



Illumination. (St 

 Illuminators un< 



cessories.) ... 316-317 



Magnifying Power ... 318 



Microscopes of various 



Kinds 318-322 



Binocular Microscopes... 319 

 Dissecting Microscopes 319-320 

 Portable Microscopes ... 321 

 Projection Microscopes ... 321 



Objectives 323-326 



Aperture ... 323-324 



Immersion Objectives ... 325 



Stages 326-327 



Mechanical Stages 326-327 



Stands 327 



Testing 327-328 



Robert's Tests ... 327-328 



Test Objects 328 



Eye-pieces. (See also As- 

 tronomy 2120.) ... 329-330 

 Photographic Lenses and 



Systems ... 330-335 

 Photographic Lenses 331-332 

 Photomicrography. (See 

 also Biology 0400, and 

 Anatomy 0145.) 332-335 

 Apparatus . . . 333-334 

 Optical Apparatus not sche- 

 duled elsewhere. Stereo- 

 scope 335-342 



Camera Lucida ... 335-336 



Coast Lighting ... 336-337 



Illuminating Apparatus 

 for Lighthouses. (See 

 also 6080.) ... 336-337 



Lighthouses 337 



Optical Telegraphy 338-339 



Projection Apparatus 339-340 

 Stereoscope. (^eea^o4440.)340-341 

 Telemeters. (See also 

 Geography 87.) 341-342 



