ELEMENTARY PHOTO-MICROGRAPHY. 1 7 



If the reader possess a short focus lens, the 

 enlargement may be made with a single camera. 

 Assuming, however, that a quarter-plate camera with 

 a lens of about 5in, focus is used, the ordinary dark 

 slide must be replaced with a thin wood slide, such 

 as may be readily cut from the lid of a cigar box. 

 In the centre of this a hole is bored %in. diameter 

 a size quite large enough for any specimens 

 mounted in circular cells and when the object is 

 mounted in an oblong cell, another wood slide can 

 be used with a hole i^in. x jin. instead of the 

 circular one. A little below this large opening make 

 two small holes with a pricker to receive two brass 

 clips like those provided with the stage of cheap 

 microscopes. These clips are to hold the glass 

 object slide in position. 



o 



Fig. i. Fig. 2. Fig. 3. 



Fig. i shows the wood slide, fig. 2 the spring 

 clips, and fig. 3 the glass object slide held in 

 position. 



Whole insects, and in fact any object too large 

 for the microscope, may be photographed in this 

 way, and some of them make beautiful lantern 

 slides ; bu.t anything larger than would be mounted 



