long distance in the future. It even appears that workable and usable 
systems to automate discrete functions that heretofore were considered to 
lend themselves to automation, such as the screening of film for areas or 
images of interest, have yet to materialize. 
Some progress, however, is being made in those technologies that 
utilize or can utilize high contrast imagery in their research and can 
limit their automation efforts to relatively small populations. Automation 
techniques have, for example, been usefully employed in the bio-medical 
sciences for the recognition of cells and in high energy physics for the 
analysis of bubble chamber photography. Such technologies are discussed 
at length in the proceedings of this Symposium which should be available, 
hard bound, by writing directly to the publisher, the Thompson Book Co., 
National Press Building, Washington, D.C. 
Two other specialized meetings) in the field were held in 
June 1967; one sponsored by the New York Academy of Science and the other 
by the Society of Photo-Optical Instrumentation Engineers. The proceedings 
of the former will be published by the New York Academy sometime this year 
while the latter have just been issued by the SPIE. 
Systems and Equipments 
  
As previously mentioned, the automatic photo interpretation 
system has yet to be developed. Various industrial organizations and re- 
search laboratories, however, have spent a considerable amount of effort 
toward its development or development of component parts. 
(5) Letter from Prof. Azriel Rosenfeld, Computer Science Center, University 
of Maryland, College Park, Maryland, U.S.A., 14 Nov. 1967.