SECOND PLENARY SESSION 
13 September, 1952. 
President Reading announced the acceptance of applications for mem 
bership in the International Society of Photogrammetry from (1) The Cana 
dian Institute of Surveying and Photogrammetry, (2) The Society of Photo 
grammetry of Great Britain, (3) The Royal Institution of Chartered Surveyors, 
Land Survey Division, (4) The Photogrammetric Society of Israel, (5) The 
Photogrammetric Society of Yugoslavia, and (5) The Photogrammetric Society 
of Japan or The Geographical Society. He also welcomed to full participation 
of the Photogrammetric Society of Germany at this Congress. 
President Reading then asked for the reading of the resolutions of the 
Technical Commissions by their Presidents. 
Dr. Howlett read the resolutions of Commission I — Photography. 
“The principal work of Commission I since the last Congress has been the 
preparation of an international specification which provides a test procedure 
to permit the results of camera tests in different countries to be compared. The 
preparation of this specification has been greatly assisted and indeed made 
possible by much discussion with interested persons throughout the world. 
Although an ideal solution to the requirement for a specification has by 
no means been reached the Commission can report some measure of success by 
the adoption of the present specification for trial, study, and discussion. The 
Commission regards this as a useful pragmatic solution for the difficult situa 
tion but at the same time wishes to encourage research in this field so that the 
specification may ultimately be developed to a thoroughly satisfactory level. 
In the interests of securing wide agreement, and completing a specification 
in the time available, it was necessary to leave out of the specification certain 
matters of interest. It is suggested that Commission I give attention to the pos 
sibility of expanding the scope of the specification. Items suggested for atten 
tion are definitions and translation of technical terms, a complete agreement 
on T-stops, a shutter test method, and a method of testing camera mountings. 
In the course of discussing definitions it has appeared to be desirable that the 
International Society of Photogrammetry should not independently define 
terms which may be the responsibility of one of the International Scientific 
Unions. For example, many terms should obviously be in agreement with those 
which are or may be defined by the International Commission on Optics which 
is under the International Union of Pure and Applied Physics. 
The following resolutions were unanimously adopted by Commission I. 
(1) Be it resolved that the Specification of Methods of Calibrating Photo 
grammetric Cameras and Measuring their Resolution, Image Illumination, and 
Veiling Glare with the modifications agreed to by the National Reporters be 
adopted for trial and discussion and that it be subject to continual review by 
Commission I. 
(2) Whereas in aerial survey several different methods of navigation are in 
actual use such as electronic methods, methods of visual or contact navigation,