Two Bitters make a Sweet 14 Visible and Invisible 14 Sight and Sound. Artificial Mirage 17 Motion of the Eye 18 Single Vision with two Eyes 19 Two objects seen as one 19 Only one object can be seen at a time 20 Straight objects seen crooked 20 Optical Illusion 21 Pin-hole Focus 21 Optical Deceptions 22 Accuracy of Sight 22 Visual Deception 23 Handwriting upon the Wall 23 Imitative Haloes 23 To read a Coin in the dark 24 To make a Prism 24 Optical Augmentation 25 Gold Fish in a glass Globe 26 Colours produced by the unequal action of Light upon the Eyes 26 Optical Deception 27 Coloured Shadows 27 Colours of Scratches 27 Ocular Spectra 28 Beautiful Colours of Mother of Pearl 28 White Letters seen further than Black 29 Artificial Rainbow 29 Fringe about a Candle 29 The Double Coloured Reflection 30 Luminous Cross 30 Ring of Colours round a Candle 30 Simple and Cheap Opera-glass 31 Multiplying Theatres 31 Apparatus for Writing in the Dark 32 Portable Microscope 33 The Phenakistiscope or Stroboscope 34 To look at the Sun without injury 35 Brilliant Water Mirror 35 Optical Illusion under Water 35 The Magic Wheels 36 Acoustic Rainbow 37