"W" stroke 32
Aberation, chromatic 153 154
Aberation, spherical 153
Abrasives 16 18—20 40 43—49 78 79
Abrasives, difference in grain size 41
Aloxite 20
Altazimuth mounting 6 7 193—200
Altitude 6
Aluminizing 17
Alundum 20
American Optical Company 41
Apparent field 150
Association of Lunar and Planetary Observers 270—272
Astigmatism, test for 113
astronomy clubs 282
Astrophotography, film for 295 296
Atlas of the Heavens (Skalnate Pleso) 268
Azimuth 6
Barlow lens 159 160
Barnesite 21
Barr Scale 55 56
Bausch and Lomb 41
Button mold 71 72
Carborundum 20 26 41
Cassegrain, G. 11
Cassegrainian telescope 3 11 308 313—315
Cassini, Dominique 10
Catadioptric systems 2 3 13 315
Catadioptric telescope 308 309
Celestial photography 279 283
Celestial photography by eyepiece projection 301—305
Celestial photography by eyepiece projection plus camera lens 305
Celestial photography, atmospheric conditions 307
Celestial photography, constellations with still 285 286
Celestial photography, film for 295 296
Celestial photography, focal plane 287—292
Celestial photography, focusing 294 295
Celestial photography, guided camera 286 287
Celestial photography, guiding for prime focus 292—294
Celestial photography, increasing film speed 300 301
Celestial photography, plate scale 305 306
Celestial photography, sensitizing methods 296—300
Celestial photography, still 284 285
Cerum oxide 20 21
Chordal stroke 29—31
circle 95 96
Clark, Alvan 12
Coma 13
Combination telescopes see "Catadioptric systems"
Conic sections 95
Corundum 20
Couder screen 103
Couder screen, testing with 104—107
Curvature of field 154
Curve from polishing action 95—97
Curve, producing 14—16
Curve, testing for 34—39
Curved strokes 32
Declination axis 231
Depth of curve, testing for 36—39
Diagonal, grinding and polishing the flat 142—144
Diagonal, mathematics 135—137
Diagonal, mirrors 135
Diagonal, placing 131—133
Diagonal, shaping 144—146
Diagonal, types 133—135
Diametral stroke 31 32
Distortion 154
Dobson telescope 196
Dobson, John 196
Dollond, John 10
Domed observatory see "Observatory"
Domed observatory, capping the wall 258—260
Domed observatory, constructing 260 261
Domed observatory, covering 261 262
Domed observatory, molded fiberglass 262—264
Domed observatory, silo tops 262
Domed observatory, slides 264—267
Edmund RKE eyepiece 158
ellipse 95 96
Emery 20
Equatorial mounting 6 7 200—203
Equatorial mounting, convert to Dobson 218—222
Eratosthenes 8 9
Everest test method 113—115
Everest, A.W. 113
Eyepiece 4
Eyepiece holder 189—192
Eyepiece test 85
Eyepiece, adapter tube for 6
Eyepiece, exit pupil 150—152
Eyepiece, eye relief 152
Eyepiece, focal length of 147 148
Eyepiece, general notes 152—155
Eyepiece, lens mathematics 160
Eyepiece, magnification 148
Eyepiece, making 163 164
Eyepiece, making the body 166—168
Eyepiece, practical considerations 160—162
Eyepiece, real field 150
Eyepiece, selection of 163
Eyepiece, types of 155—160
Fiberglass cell 180—183
Field Book of the Skies (Olcott, Newton and Mayall) 268
Field of view 150
Finders 222—225
Fine grinding 16 17
Fine grinding, final stage 47—49
Fine grinding, process 42
Focal length 5 6 13 52 147 148
Focal length, finding lens 164—166
Focal length, Foucault tester 62 63
Fork (English) mounting 204
Foucault test, locating mirror defects 83—85
Foucault test, principle of 50—52
Foucault tester 50
Foucault tester, Barr scale 55 56
Foucault tester, hot wire light source 60—62
Foucault tester, knife-edge apparatus 54 55
Foucault tester, simplified 52—54
Foucault tester, used for focal length 62 63
Galileo 9
Garnet 20 42
German mounting 204 207—218
Glass, cutting 140—142
Glass, testing for flatness 137—140
Gregorian telescope 308
Gregory, James 11
Grid mold 70 71
Ground board 199
Haas, Prof. Walter H. 271
Hayden Planetarium 71
Herschel, William 10 11
Hevelius, Johannes 10
Housings, simple 252 253
Huygenian eyepiece 155
Huygens, Christian 10 155
Hyperbola 95 96
Kellner eyepiece 157
Koenig eyepiece 158
Lens, Barlow 159 160
Lens, eye 147
Lens, field 147
Lens, finding focal length 164—166
Lick Observatory 3 12
Lippershey, Jan 9 10
Lunar occultations, observing of 277 278
Macintosh tester 56
Macintosh tester, materials needed 57 60
Macintosh, Allan 57 316
| Magnification 148
Magnification, chromatic differences in 154 155
Maksutov Club 316
Maksutov telescope 4 309 315 316
Mason, E.L. 78
Masson, Kelvin 57
Mathematics, diagonal 135—137
Mathematics, lens 160
Mathematics, mirror making 98—100
Mayall, Margaret 268
Mechain, Pierre 280
Messier catalogue 280
Messier objects 280—282
Messier, Charles 280
Meteors, observing and recording 276 277
Millbrook Observatory 78
Minor Plants Bulletin, The 271
Mirror and tool dimensions 18
Mirror blank 18
Mirror cell 176—178 200
Mirror cell, central support 184 185
Mirror cell, double plate 183 184
Mirror cell, four point support 185 186
Mirror cell, making a simple 178—180
Mirror coatings 128—130
Mirror kits 17 18
Mirror, aluminizing 17
Mirror, basic materials 17—21
Mirror, concave 4
Mirror, correcting irregularities 87—93
Mirror, depth of curve 14—16
Mirror, figures of revolution 95
Mirror, figuring 17
Mirror, final polishing 93 94
Mirror, fine grinding 16 17 40—49
Mirror, flat diagonal 135
Mirror, large 312 313
Mirror, locating defects 83—87
Mirror, mounting 6
Mirror, other accessories 21 22
Mirror, polishing 17
Mirror, production mathematics 98—100
Mirror, rough grinding 26—39
Mirror, small diagonal flat 4
Mirror, specifications 5
Mirror, surface imperfections 52
Mirror, testing for astigmatism 113
Mirror, testing overall figure 107—113
Mounting, altazimuth 6 7 193—200
Mounting, balancing 225—227
Mounting, Dobson telescope 196
Mounting, Dobson to equatorial 218—222
Mounting, equatorial 200—203
Mounting, equatorial to Dobson 218—222
Mounting, finders 222—225
Mounting, Fork (English) 204
Mounting, German 204 207—218
Mounting, permanent 252
Mounting, polar axis 203
Mounting, yoke 203
Mt. Palomar 3 5 11 12
Newton, Isaac 10 11 155
Newton, R. 268
Newtonian reflector telescope 308 see
Newtonian reflector telescope, long-focus 309
Newtonian reflector telescope, short-focus 310—312
Norton's Star Atlas 268
Oblate spheroid 118 119
Oblique astigmatism 154
Observatory see "Domed observatory"
Observatory, domed 257—267
Observatory, furnishing 267 268
Observatory, sliding roof 253—257
Olcott, William 268
Onions, E.G. 60—62
Optical surfaces, cleaning of 251 252
Optical train 228—230
Optics, protecting the 251
Orthoscopic eyepiece 158
parabola 95
Parabolizing 312
Parabolizing, accuracy in 123—127
Parabolizing, correcting the hyperboloid 117 118
Parabolizing, correcting the oblate spheroid 118 119
Parabolizing, methods 119—122
Parabolizing, test observations 117
Parabolizing, working conditions 116 117
Paraboloid shadows 103
Paraboloid, meaning of 17 95—97
Paraboloid, producing 116—130
Paraboloid, testing for 98—115
Paris Observatory 103
Pitch 21
Pitch lap 17 40 50
Pitch lap from pre-cut pitch 72 73
Pitch lap, button mold 71 72
Pitch lap, channeling 66—68
Pitch lap, contact with mirror 68 69
Pitch lap, grid mold 70 71
Pitch lap, making 65
Pitch lap, molded patterns for 69 70
Pitch lap, sawed 65 66
Pitch lap, tempering 65
Pitch lap, testing for hardness 64 65
Pitch lap, waxing and screening 69
Pitch, pre-cut 72 73
Plastic lap 79—82
Ploessl eyepiece 158
Polar axis 203 231—233
Polishing 17 83
Polishing agents 20 21 40
Polishing to remove pits 75—78
Polishing, nature of 74
Polishing, objectives and techniques 74 75
Polishing, quick methods 78 79
Poulkova Observatory 12
Prism, right-angled 133 134
Pyrex 18 26
Ramsden eyepiece 155
Rayleigh Standard 100—103
Rayleigh, Lord 100
Reflector telescope 2 3 12 14
Reflector telescope, concave mirror 4
Reflector telescope, eyepiece 4
Reflector telescope, small diagonal flat mirror 4 6
Refracting telescope 2 3 12
Refractors 316 317
Rocker box 198
Ronchi test 85—87
Rouge 20
Rough grinding, effect of strokes 32 33
Rough grinding, fundamental strokes 28 29
Rough grinding, starting 33—35
Rough grinding, template and use of 35 36
Rough grinding, types of strokes 29—32
Sagitta 15
Schmidt camera 315
Schmidt telescope 3 4 12
Schmidt, Bernard 13
Sky and Telescope 268
Solid eyepiece 157
Sonotubes 196
Sphericity 52
Stars, variable observation of 272—275
Storage 250
Strolling Astronomer, The 271
Sub-diameter lap 91 92
Sunspot observation 278
Telescope adjustment, collimation of the optical train 228—230
Telescope adjustment, declination axis 231
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