viii CONTENTS 



CHAPTER VI 



THE PHOTO-MICROGRAPHIC CAMERA 



PAGES 



Simple Forms of Vertical Cameras Van Heurck's Apparatus 

 J. W. Gordon's Method Types of Horizontal Cameras by Swift, 

 Zeiss, Ross, Bausch and Lomb Camera on the Geometric Slide 

 Principle Combined Vertical and Horizontal Cameras Cameras 

 for Instantaneous Work and for Opaque Objects . . 111-145 



CHAPTER VII 



THE USE AND MANIPULATION OF THE MICROSCOPE 



Setting up an Object and obtaining a properly Illuminated Field of 

 View Focussing the Objective The Selection of a Suitable 

 Ocular The Care of Objectives and Oculars Care of the Eyes 

 Correction for Thickness of Cover-glass and Adjustment of Tube 

 length The Adjustment of the Sub-stage Condenser The 

 Adjustment of the Auxiliary Collecting-lens . . 146-174 



CHAPTER VIII 



GENERAL PRELIMINARY PREPARATIONS 



Vibration and its Prevention Light -excluders and Methods of 

 Connection between Microscope and Camera Diffused Light 

 Heat from Illuminant Diaphragms Size of Camera 

 Focussing -screens Focussing Eye-pieces Placing Microscope 

 in Relation to Camera Methods of Exposing The Process 

 of Focussing Magnification The Dark-room and its Illu- 

 mination ......... 175-204 



CHAPTER IX 



COLOUR-SCREENS PLATES EXPOSURE 



Colour -screens for correcting Objectives To increase and decrease 

 Colour Contrast in the Object Methods of making Gelatin 

 and Collodion Colour-screens Fluid-screens The Absorption- 

 spectra of some Dyes used for Colour-screens Monochromatic 

 Light-apparatus Screens for Use with Mercury -vapour Lamps 

 Photographic Plates and the Influence of Speed on Size of 

 Grain Suitable Ordinary and Isochromatic Plates Halation 

 and its Prevention The Resolution of Photographic Plates 

 Exposure and its Estimation ..... 205-228 



CHAPTER X 



PHOTOGRAPHIC PROCESSES 



The Development of the Negative Developers Defects in Negatives 

 Intensification and Reduction Printing Processes P. O.P. 

 and Bromide Prints Glazing and Enamelling Prints Lantern- 

 slides on Gelatin and Wet-collodion Plates Their Development 

 and After-treatment The Projection of Lantern-slides . 229-249 



