CLASSIFIED CONTENTS OF VOLUMES IVI 701
XI. OPTICScontinued.
PAGE
On the Manufacture and Theory of Diffraction-Gratings. Art. 30.
1874..........Vol.1 199
Insects and the Colours of Flowers. Art. 31. 1874 ... 222 Investigations in Optics, with special reference to the Spectroscope. Art. 62. 1879, 1880...... 415
Resolving, 'or Separating, Power of Optical Instruments . . 415'
Rectangular Sections ........ ,,418-
Optical Power of Spectroscopes ...... 423
Influence of Aberration ....... 428
On the Accuracy required in Optical Surfaces .... 436
The Aberration of Oblique Pencils ...... 440
Aberration of Lenses and Prisms ...... 444
Tbc Design of Spectroscopes ....... 453
On Reflection of Vibrations at the Confines of two Media
between which the Transition is Gradual. Art. 63. 1880 460 On the Minimum Aberration of a Single Lens for Parallel
Rays. Art. 64. 1880....... 466
On the Resolving-Power of Telescopes. Art. 67. 1880 . . 488. On the Resultant of a large number of Vibrations of the same
Pitch and of arbitrary Phase. Art. 68. 1880 . . . 491 On Copying Diffraction-Gratings, and on some Phenomena
connected therewith. Art. 72. 1881 .... 504 On Images formed without Reflection or Refraction. Art. 73.
1881..........' 513
On the Electromagnetic Theory of Light. Art. 74. 1881. . 518
On the Velocity of Light. Art. 75. 1881..... 537
On a Question in the Theory of Lighting. Art. 76. 1881 . 541
Experiments in Colour. Art. 77. 1881..... 542
The Use of Telescopes on Dark Nights. Art. 82. 1882 . . Vol. II 92 On the Dark Plane which is formed over a Heated Wire in
Dusty Air. Art. 93. 1882...... 151
On the Invisibility of Small Objects in a Bad Light. Art. 96.
'1883.......... ,,187
Distribution of Energy in the Spectrum. Art. 99. 1883. . 198 On the Constant of Magnetic Rotation of Light in Bisulphide
of Carbon. Art. 118. 1885...... ,,300
The Helix........... ,,367
Correction for Finite Length . . . . . . ,, 368-
Appenclix : Notes on Polarimetry in general .... ,, 378
Postscript. [Work of H. Eecquerol]..... 383-
Optics. Art 119. 1884........ 385-
On the Theory of Illumination in a Fog. Art. 121. 1885 . 417 A Monochromatic Telescope, with Application to Photometry.
Art. 122. 1885 . . . . ' . . . . 420-On the Accuracy of Focus necessary for Sensibly Perfect
Definition. Art. 126. 1885....... 430<uction of Coaxial Helices. Art. 252. 1899 . 431Art. 331. 1908 .... 478