Illustrated Catalogue Of Magic Lanterns (after November 1889, probably 1890)

202 MCINTOSH BATTERY AND OPTICAL CO., CHICAGO, ILL., U. S. A. 114 Contrast colors. (Scina’s apparatus) 115 Apparatus tor mixing colored light. (Helm- holtz) 116 Apparatus for mixing colored light. (Dove) 117 Complimentary colors 118 Dichroscopic lens. (Haid- inger) 119 The Diclirooscope. (Dove) 120 Spectre of white and col- ored strips 121 Helmholtz’s analysis of compound colors 122 Maxwell’s analysis of compound colors 123 Maxwell’s color triangle, &c. 124 Color circle. (Von Bez- old) 125 Diagram of color sensa- tions. (Helmholtz) 126 The rainbow 127 Explanation of the rain- bow 128 Refraction in rain-drops 129 Camera obscura 130 Photographic camera 131 Camera lucida 132 Magic Dantern 133 Bi-unial lantern for dis- solving views 134 Duboscq’s electric lan- tern 135 Foucault’s and Duboscq’s electric lamps 136 Duboscq’s vertical lan- tern 137 Enlarged image produced by convex lens 138 Simple microscope. Mag- nifying glasses 139 The compound micro- scope 140 Achromatic eye-piece 141 Binocular microscopes 142 Rosse’s complete binocu- lar microscope 143 Solar microscope 144 Duboscq’s lantern micro- scope 145 Use of Duboscq’s micro- scope at siege of Paris 146 Galilean telescope. Op- era glass 147 The astronomical tele- scope 148 The terrestrial telescope 149 Reflecting telescopes. No. 1 150 Reflecting telescop es. No. 2 151 The Rosse telescope 152 Diagram of plane wave 153 Movement of particles in advancing wave 154 Diagram of pendulum 155 Diagram of harmonic motion 156 Experimental illustra- tion of wave-motion, No. 1 157 Experimental illustra- tion of wave-motion, No. 2 158 Crova’s wave-motion ap- paratus. Longitudinal 159 Crova’s wave-motion ap- paratus. Transversal 160 Huyghens’ principle of undulations 161 Huyghens’ construction for reflection and refrac- tion 162 Velocity of light in air and water. Foucault’s experiment 163 Diagrams explaining in- terference of waves 164 Apparatus illustrat i n g interference of waves 165 Weber’s figure of inter- fering waves No, 1 166 Weber’s figure of inter- fering waves, No. 2 167 Fresnel’s mirror 168 Diagram of interference by Fresnel’s mirror 169 Bi-prisms, &c., for inter- ference experiments 170 Jamin’s interferential refractor 171 Colors of thin plates. Soap bubble 172 Diagram explaining col- ors of thin plates 173 Newton’s rings 174 Diffraction of light 175 Diffraction fringes. Young’s experiment 176 Diagram of interference by diffraction 177 Diffraction telescope and figures 178 Diffraction figures, No. 1 179 Diffraction figures, No. 2 180 Diagrams explaining dif- fraction fringes 181 Measurement of wave length. No. 1 182 Measurement o f wave length. No. 2 183 Table of wave lengths 184 Diffraction spectre 185 Principle of diffraction grating 187 Measurement of wave length by diffraction spectrum 187 Comparison of diffraction with prismatic spectrum 188 Phenomena of polariza- tion by reflection 189 Reflecting polariscope 190 Polarizing angle and dia- gram of intensities 191 Illustration of meaning of “polarized” ray 192 Polarization by series of parallel plates 193 Polariscope with pile of Plates 194 Norrenberg’s polari- scope 195 Planes of polarization and of vibration 196 Polarization by tourma- lin 197 Illustration of “polarity” by iron filings 198 Crystal of Iceland spar, and double refraction 199 Diagram of double re- fraction in Iceland spar 200 Optic axis and principal section 201 Double image of aper- ture, projected on screen 202 Effect of rotating the crystal 203 Experiment showing op- posite polarization of the two images 204 Experiment with plate of tourmalin 205 Apparatus for Huyghen » experiment 206 Phenomena of Huyghen S experiment 207 Ordinary and extraordi- nary rays 208 Huyghen’s explanation of double refraction 209 Verification of law of double refraction 210 Ellipsoids of revolution. Positive and negative 211 Wave surface of positive crystal 212 Wave surface of negative crystal , 213 Senarmont’s isothermal lines in crystal .. 214 Sorby’s uni-focal and bi- focal images 215 Achromatic double-im- age prisms f 216 Senarmont’s, Rochon s and Wollaston’s prisms 217 Double image microme- ter 218 Nichol’s prisms. No. 1 219 Nichol’s prisms and Fou- cault’s modification 220 Arrangement of polarizer and analyzer 221 “Depolarization” by se- lenite film , 222 Crystal of selenite and ideal structure . 223 Diagram of waves within selenite film _ 224 Effect of rotating, 1 .—Se- len te. 2 .—Analyzer 225 Complementary colors shown by double image prism 226 Diagram explaining com- plementary colors, No. a 227 Diagram explaining com- plementary colors, No. f 228 Wheatstone’s polar olocK 229 Sound vibrations in bar of glass revealed by P°" larized light , 230 Presses for heating and compressing glass 231 Phenomena exhibited by compressed glass 232 Diagram explaining phe- nomena of compressea glass 233 Phenomena of unan- nealed glass. No. 1 234 Phenomena of unan- nealed glass. No. 2 235 Phenomena of unan- nealed glass. No. 3 236 Starch grains, by polar- ized light . 237 Sections of wave surface of biaxal crystal 238 Intersecting wave surface in biaxal crystal 239 Conical refraction. The- ory 240 Conical refraction, lx / ternal 241 Conical refraction. J u ternal 242 Tourmalin pincette 243 Norrenberg’s polariscoP arranged for converged light 244 Polari-microscope. (H uu man)