THE SCENOGRAPH 



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" brought up," and when developed is washed in water, and after by a 

 solution which dissolves all the silver from the parts not darkened by the 

 light. Thus the negative is obtained and printed from in the usual manner. 



Instantaneous photography is now practised with great success. An 

 express train, or the movements of a horse at full speed, can thus be taken 

 in a second or less. These results are obtained by using prepared plates, 

 and the " emulsion process," as it is called, succeeds admirably. The mode 

 of preparation is given in a late work upon the subject, and the photo- 

 graphic plates may also be obtained ready for use. Gelatine and water, 

 mixed with bromide of ammonium, nitrate of silver, and carbonate of 

 ammonium, mixed with certain proportions of water, form the " emulsion." 

 We need not go into all the details here. Information can easily be 

 obtained from published works, and as the plates can be purchased by 

 amateurs, they will find that the best way. 



Aside from the art interest in the new plates is quite another, that 

 springs from the fact that it is now possible to take pictures of men, 

 animals, and machinery in rapid motion, thus enabling us to view them in 

 a way that would be impossible with the unaided eye. The first experi- 

 ments in this direction were applied to the movements of a horse moving at 

 full speed. The pictures, taken in series, showed that he performed muscular 

 actions that were not before comprehended or even imagined. These 

 pictures at the time attracted great attention, and instantaneous pictures 

 have been since taken of dancers in a ball-room, of vessels and steam-boats 

 in rapid movement, of all kinds of animals in motion, and of machinery in 

 operation. As the pictures represent the movements at one instant of time, 

 they give, as it were, a fixed view of a motion, precisely as if it were sud- 

 denly arrested in full action. In the case of animals, the motions of the 

 nostrils are represented in the most singular manner, and the spokes of a 

 steam-boat's paddle-wheel are shown apparently perfectly still while the 

 spray and waves appear in active motion, or, rather, as they would look if 

 they could be instantly frozen. It is clear the new process and pictures will 

 open a wide and instructive field in art and in the study of mechanical 

 action. 



While on the subject of Photography we may mention a very ingenious 

 little apparatus called a SCENOGRAPH, the invention of Dr. Candize. It is 

 really a pocket-camera, and is so easily manipulated that it will be found 

 a most pleasant and useful holiday companion. Any one may obtain good 

 results with it, and friends of ours have had occasion to put it in practice 

 during a series of excursions, when it was found to answer in every instance. 



The Scenograph is something like a common Stereoscope in outward 

 appearance, and would, perhaps, be at first regarded as a mere toy, did not 

 a more intimate acquaintance prove it a great acquisition, particularly to 

 explorers and tourists. The tripod stand which supports the apparatus is, 

 when not in actual use in that capacity, a very excellent walking-stick, in 

 which the two other " legs " are carried. The instrument, as will be per- 



