37 
this flexible plate through the back the print will be reversed 
again, without losing the necessary sharpness. 
To illustrate the manifold usefulness of the invention the 
lecturer showed about two dozen lantern slides, including some 
remarkable snapshots of outdoor life, children on the Brighton 
Beach, etc., all printed by Dr. Jumeaux’s process. He also 
showed from the same negatives three-colour prints by the carbon 
transfer process ; also some colour photos taken half-plate size 
in block printing and carbon printing, which show by the absence 
of colour fringes their superiority over three colour prints of which 
the negatives were taken in succession by a repeating back camera. 
In a conversation we had lately with the lecturer he said : 
“J had hoped to find such interest in Brighton (the birthplace of 
the invention), or in London, as to be able to launch out ina 
commercial enterprise, but I find the proverb is true: ‘The 
prophet is not acknowledged at home.’ However, the Imperial 
Austrian School of Photography has taken a great interest in my 
auto-didactic studies and advancements in colour photography.” 
The diagrams given were explained on an actual camera by 
the lecturer. 




F tea Rao Fig. 1 represents a glass 
ch interposed at an angle to 
% the light cone coming from 
Cs Sey) LE ee a lens, and shows the re- 
SE TA. } A fiections and refractions. 
SA. Short Refraction Fig.J 
Fig. 2 is the skeleton: 
of a camera. 
T = Orange red Reflector. 
T 2 = Compensation. 
P = Place for Back Plate. 
P 1 = Place for Top Plates. 

