CAMERA AND PHOTOGRAPHIC APPLIANCES 33 



therefore poured it off from the plate in de- 

 veloping dish, supposedly into an empty grad- 

 uate, but really into one containing hydro- 

 quinon prepared for use. This mixture was 

 in turn flowed over the fully developed, but 

 very thin, negative in dish, and not until the 

 rapid darkening of the plate became notice- 

 able was the mistake observed. The result- 

 ant negative proving to be one of the best 

 I had ever made and the compound developer 

 remaining clear, I continued to use it, and 

 from that time to the present always with 

 satisfactory results. In an article contributed 

 to Anthony's International Annual for 1891 

 I have given a rather full account of this 

 " eiko-hydro " developer, with formulae for 

 compounding in two solutions or a single 

 one. For years, however, I have used it in the 

 powdered form, as this keeps indefinitely and 

 is always ready for quickly making a solution 

 of unvarying strength. The formula is as fol- 

 lows : 



NO. I. 



Eikonogen I oz. 



Hydroquinone ........... % oz. 



Mix very thoroughly and keep in a glass vessel with 

 screw top. An empty jar of Higgins' Photo-Mounter 

 will be found just the thing for this purpose. 



