THE CAMERA, ETC. 

 FIG. 22. 



51 



brass rose cock near the bottom, may be fixed on a 

 stand, about three or four inches higher than the 

 trough and on its left hand side. 



Some shelves to hold stock solution, etc., are 

 placed against the wall opposite to the window, a 

 small shelf being fastened above and below the 

 window itself to hold the bottles and dishes in 

 actual use. 



On the right hand side of the trough a square box 

 is fixed just deep enough, to allow the flame of a 

 lamp, with a chimney of ruby glass, to appear above 

 it. 



The best method of preventing any actinic light 

 from the lamp reaching the sensitive plates, is to cut 



E2 



