CHAPTER VI 



PRINTING METHODS LANTERN SLIDES 



I fear the title of this chapter may be some- 

 what misleading, since it is by no means my 

 intention to enter upon a description of the 

 many printing processes open to the photo- 

 micrographer. There is not available space 

 in this book for the full explanation of a tithe 

 of them, and the student is referred to the 

 many works on photographic matters for in- 

 formation on the subject in general; but there 

 are some inklings, born of experience, which 

 I think it well to jot down. It may be 

 broadly stated that any known printing pro- 

 cess will yield good prints from a photo- 

 micrographic negative, although there is a 

 very decided choice among them if one looks 

 for the best work. The old albumenized or 

 plain salted papers, gelatine or chloride emul- 

 sion P. O. P., of which there is an endless 

 variety, carbon tissue, platinum and bromide 

 of silver papers, will all give good results if 

 properly used. But my own preference is 

 decidedly for the Velox glossy paper, which I 



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