Photographic Self Help 



Pendulum for the Dark-Room 



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The pendulum swings 



from one terminal to 



the other in half a 



second 



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I'cight fas- 

 tened to a thread 

 measuring 9-} 4 'in 

 length and hav- 

 ing a loop at the 

 end to be hung 

 from a hook in 

 the edge of a shelf, 

 makes a capital 

 aid in counting 

 seconds for tim- 

 ing the appear- 

 ance of the image 

 in the time sys- 

 tem of develop- 

 ment. One sec- 

 ond counts at one 

 end of the swing 

 only, since the pendulum swings from 

 one terminal to the other in half a second. 

 The exact weight of the pendukim does 

 not matter, the period of lime depending 

 upon the length, not the mass. This 

 device may be so constructed as to count 

 minutes. A small metal hand may be 

 placed at the anchoring end of the 

 pendulum. As the weight shifts from 

 one terminal to the other the hand will be 

 actuated against some object which will 

 enable the operator to count the periods. 



An Improvised Reflecting-Camera 



AX't^RY simple arrangement can be 

 fitted to a hand-camera to enable 

 the photographer to see the image on the 

 ground glass, right side up, and without 

 the use of a focusing cloth, while still 

 holding the camera in the hand. This 

 consists of an ordinary mirror, on thin 

 glass, cut to the same size as the ground 



glass of the camera and mounted on the 

 inside of the door covering the ground 

 glass opening. The mirror is held at an 

 angle of about 45° to the back of the 

 camera by attaching a string or light 

 chain to the door and the back of the 

 camera. When it is desired to view the 

 image on the ground glass the door is 

 opened and allowed to drop down as far 

 as the string will allow, and the eyes are 

 placed at the top of the triangular open- 

 ing thus provided. The image will be 

 seen in the mirror, right side up. 



Novel Device for Copying Pictures 



THK illustration shows a handy appa- 

 ratus for copying pictures. A piece 

 of groove siding is ripped in the center, 

 and two pieces 12 ins. long are dressed on 

 the edges. A piece of glass about io".\i6'' 

 is required. Two brackets are placed on 

 the strips which hold the glass. Using 

 an old drawing board the brackets and 

 uprights are screwed in place, allowing 

 space between the uprights for the glass. 

 A strip of felt is placed on each narrow 

 end of the glass, which is placed between 

 the grooves. The copier sits directly 

 facing the glass, after placing the j^icture 

 on the table and securing it with thumb 

 tacks. The reflection of the picture can 

 be seen through the glass and copietl. 



A mirror the size of the ground glass of the 

 camera is mounted on the inside of the door 



The picture is reflected throuRh the glass 



and may be copied on blank paper with pen 



or pencil 



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