XV111 



CONTENTS. 



APPARATUS. 



Camera with object glasses and stage 

 adapted to it. 



Mr. Wenham's arrangement without a 

 camera. 



Dr. Woodward's method. 



Camera applied to the ordinary micro- 

 scope. 



Dr. Maddox's camera. 



Dr. Maddox's arrangement for working 

 without a camera. 



Arrangement of Drs. Abercrombie and 

 Wilson. 



Of the illumination : sunlight : mono- 

 chromatic light : polarising appara- 

 tus. 



Artificial light. 



Of focussing. 



Of the object glasses. 



Stereoscopic photographs. 



Collodion. 



Nitrate bath. 



Of the developing solutions. 



The fixing solutions. 



Cleaning the plates. 



Arranging the camera. 



CHEMICAL SOLUTIONS REQUIRED. 



Inserting the plate. 

 Developing the image. 

 Of increasing the intensity of the nega- 

 tive. 



Varnishing the plate. 

 Of cleaning old plates. 



PRINTING. 



Preparing the paper. 

 Toning solution. 

 Another toning solution. 



Fixing solution. 

 Mounting the prints. 



PHOTOGRAPHS FOR THE MAGIC LANTERN. 



Magnesium light. 



Photographs of microscopic objects for 

 the magic lantern. 



PART V. 



OF THE HIGHEST MAGNIFYING POWERS YET MADE AND OF 

 THE BEST METHODS OF USING THEM NEW METHOD OF PRE- 

 PARING SPECIMENS FOR EXAMINATION WITH THE HIGHEST 

 POWERS --NEW VIEWS CONCERNING THE STRUCTURE, 

 GROWTH, AND NUTRITION OF TISSUES, AND ON LIFE. 



Apology for the use of veiy high magni- 

 fying powers. 



Of the highest magnifying powers. 



"Immersion" twenty-fifth. 



Of the one-fiftieth objective. 



The apparent size of an object under 

 different powers. 



Of the covering glass. 



Illumination of objects magnified by 



very high powers. 

 Method of increasing the size of the 



image without altering the object 



glass. 

 Of drawing objects magnified by very 



high powers. 



NEW METHOD OF PREPARING SPECIMENS FOR RESEARCHES WITH THE AID 

 OF THE HIGHEST MAGNIFYING POWERS YET MADE. 



Conditions to be fulfilled in demonstrat- 

 ing minute structure by the highest 

 powers. 



Action of glycerine and syrup on tissues. 



Of the advantages of viscid media for 

 the dissection of tissues or examina- 

 tion with the highest powers. 



The carmine fluid for staining germinal 

 matter. 



Glycerine and syrup. 



The injecting fluid. 



Other colouring solutions with glyce- 



rine. 



Glycerine and water, and glycerine and 

 acetic acid for washing and preserving 

 thin sections. 



