july — sept. 1857.] Stereoscopic Portraits. 



253 



This might be said of almost any book, I suppose every book, 

 of the kind. What is a learner to do who has no better materials ? 

 It is destructive for a learner to use a book, when he is not sure 

 whether the sentences are Tamil or not. 



I mention these particulars of this book, as illustrative of the 

 mistakes, and undigested ideas that are current on the subject. 



X. A mode of taking Stereoscopic Portraits with a common 

 Camera. By Lieut. L. Paxton. 



(Communicated to the Madras Photographic Society and by them to the 

 Journal for publication). 



Thinking it may be useful to Photographers who wish to take 

 Portraits for the Stereoscope, but who have only a common Camera 

 I send the plan of an addition by which this may be done. 



As very nice work is not required, it may be made by~an ordi- 

 nary carpenter and at a very slight expense. The time taken to 

 do both pictures is but little above that required for the two ex- 

 posures. The back of the Camera B. re- 

 mains unaltered with the exception of thin 

 strips of wood c. c. which are attached to 

 it to receive a thin screen S. which sepa- 

 rates the pictures ; the length of the screen 

 depends on the focus of the Lenses. 

 There should be as little interval between 

 it and the exposing frame at one end, 

 and the back line of the combination on 

 the other as possible. 



The front of the Camera required may be made of teak wood in 



