tese 
hat 
(375) 
these did not seem insurmountable. Perhaps the manufacturers would consider 
it too difficult to move their machines for such a competition, but they have 
moved them in order to show them in the exhibition. 
At 1.43 Mr. Blachut (Canada) requested the floor. In his view the French 
proposition went too far. The role of the International Society of Photogram- 
metry might fix the methods of testing and guide in the choice of classification 
but to constitute itself an international authority might conduce to grave dis- 
sension between the different countries. Another difficulty would be the choice 
of the place of the competition and the formation of the jury. This internation- 
al jury would not have the necessary authority because many countries refuse 
to submit themselves to its decision. Mr. Blachut thought it more wise to adopt 
the method recommended by the Americans for standardizing adjustment of 
the apparatus. 
Mr. Poivilliers responded that it would be dangerous for the manufacturer 
to leave the adjustment and classification of their apparatus to operators from 
a strange country; that this would not be the case with the French proposition. 
The Pennington test would not cover more than one part of the operation. 
With the French proposition one could better change the production of the 
apparatus and their ease of operation, their precision, comparing the machines 
of different orders and arrive perhaps at the conclusion that first order ma- 
chines had as high a production as machines called simplified and often chosen 
for large production. 
At 1.49 Mr. Blachut resumed the floor. I do not see any difficulties in 
correcting the figures of precision given by the manufacturer for their ma- 
chines. In 80% or 90% the figures correspond to the reality. The French proposal 
risks injury to the development to the photogrammetric industry. 
At 1.50 General Hurault of France took the floor. He said in substance, “1 
am astonished that the photogrammetrists using these machines have not ac- 
cepted with enthusiasm the proposition to compare the machines in the field 
of practical employment. That the manufacturers hesitate one could under- 
stand but we are above all users who ought to be happy for this chance to 
acquire new knowledge. The only difficulty to be resolved ought to be the 
material difficulty which will not be insurmountable. 
Commission II might be charged with a first test: accuracy and produc- 
tion of a machine for a given scale; 1: 25,000, 1 : 10,000, 1 : 5,000. Which 
nation would accept the organization of the tests? Very likely France would 
accept it. There is to be solved a problem of terrain and a problem of taking 
the photographs. The problem will be easy to decide, because it concerns a 
surface relatively small which could be chosen far from all zones of economic 
or strategic importance. For the photography, the organizing country could 
undertake the photography with the same airplane and the different cameras 
at the scale requested by each competitor. A photographer from the country 
interested could be aboard the airplane and could have the operation repeated 
in case it did not appear satisfactory to him. 
As for the survey of the ground control, each competitor would request 
the number of points at the places desired; these control points would be 
measured by an international commission, which would establish a super abun- 
dant net at the same time, which would be kept secret and would serve to test 
the plotting. The International Jury would intervene to judge the results by 
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