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CAMERA AND PHOTOGRAPHIC APPLIANCES 29 



ruby glass in front of which may be placed 

 one or more thicknesses of post paper, affords 

 a perfectly safe light for any plate, though 

 none should ever be exposed close to the lan- 

 tern, nor for a longer period than is abso- 

 lutely necessary during development. This 

 lantern has never emitted any unpleasant 

 smell, and the secret of this is that it has 

 never been permitted to get into a condi- 

 tion for so doing. " Eternal vigilance " alone 

 has been the cause of its freedom from this 

 too-frequent occurrence, but the same care 

 would prevent the nuisance with any other 

 lantern that is fit to use at all. The rules 

 which I never neglect are extremely simple. 

 The lamp is kept at all times well filled with 

 the best oil, carefully wiped dry, and the wick 

 properly trimmed. The lantern and chimney 

 are also carefully wiped both inside and out 

 with a clean, dry cloth. The flame is kept at 

 a moderate height to avoid danger of smok- 

 ing, and the lantern door is opened at all per- 

 missible times for cooling the interior. As 

 soon as work is done, the light is extin- 

 guished, and the lamp removed from the lan- 

 tern, which is thrown completely open and 

 thoroughly wiped out to remove any oil 

 which may have been volatilized and con- 



