The advance of photography : its history and modern applications (1911)

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LIST OF ILLUSTRATIONS Collotype Leaf photographs Camera obscura Leaf photograph Wet plate dark slide Printing-frame . Vignetting Wave illustration Diagram to illustrate— Refraction . ,, in raindrop „ „ prism Spectrum . Solomon's lamp Flash bag Diagram to illustrate— Path of sun's rays . Lines of latitude Crystal of chrome alum Electrotyping Gelatine relief Action of light on bichromated gelatine Refraction of light ,, through plate glass ,, ,, „ glass prism Connection between lens and prism Action of lens on parallel rays Conjugate foci Formation of image by lens Types of lenses Spherical aberration Focal lines . Circle of least confusion Distortion of image by lenses