Details of exhibit

Exhibition:
1913 Fifty-eighth Annual Exhibition of the Royal Photographic Society of Great Britain  
Exhibit title:
Upper row, x 75  
Exhibitor:
Ernest Marriage 
Section:
III. Scientific and Technical Exhibits, Natural History, Colour Prints, Lantern and Stereoscopic Slides 
Group Title:
Microscopical examination of Jams 
Exhibit No.:
591 
Exhibit No. 2:
[1] 
Description:
The whole exhibit represents methods of microscopic and micro-chemical analysis of colloids, jams in particular.

All three samples mixed with iodine which darkens the apple cells, containing starch.
Raspberry unaffected.
"Improved" Raspberry, apple cells appear black.
Apple and Raspberry, apple cells appear black. 
Exhibit type:
Photograph 
Process:
[Not Listed] () 
Award:
medal