96 



BACTERIAL DISEASES OF PLANTS 



from a light room they must be kept locked while development is 

 going on. Often this is very inconvenient to others, but it 

 is the only safe way. 



Our own dark-room (Fig. 61) occupies the northwest corner 

 of a well-lighted large south room which is used for general 

 photographic purposes. It measures, inside, approximately 9 

 feet north and south by 15 feet east and west, and is divided into 



FIXING 



CORRIDOR 



Pff/NT/NG 

 ROOM 



O O 



o 

 o 



O ELECTRIC BULBS 



r FAUCETS 



. .RUNWAYS 



= WINDOWS (DARK ROOM.1'9"2'6") 



Z ELECTRIC SWITCHES 



PHOTOGWPH/C ROOM 



22' 



CAMERA 



WINDOW 

 O O O _.-.. 5' 



CAMERAS 



WINDOW 



O 00 



FIG. 61. Diagram of photographic room, printing room and dark-room used by 



the writer. 



two parts: (1) an ante-room on the west side, used for making 

 prints ; (2) the dark-room proper, used only for the development 

 of negatives. The ante-room is long and narrow with a sink 

 at the northwest corner (behind the corridor door), the re- 

 mainder of the west wall space being occupied by a printing and 

 developing table. The printing is done by means of a battery 

 of large size, fixed tungsten lights, in the southwest corner. The 



