(8) 
There was argument as to whether the charges were on the film before it unrolled, 
or whether they were produced in the camera. All sorts of treatments were 
attempted, including conducting and insulated rollers in the camera and ioniza- 
tion of the interior of the magazine. The trouble seems to have become non- 
existent. 
Photogrammetrists very soon realized the advantages arising from an 
extended field of view in an air photograph, and prior to the development of 
wide-angle lenses, made many experiments with multi-lens cameras. In 1937 
a Barr and Stroud seven-lens camera and rectifying printer were acquired, with 
2.01 in. (50.8 mm) focal length and some experiments made with photographs 
taken by it in Labrador. The results were not considered satisfactory. For 
one thing, it appeared that unless considerable expense of money and time were 
to be put into the rectification, satisfactory matching of the views along junction 
lines could not be achieved. 
It might be mentioned that at first, in Canada, the Royal Canadian Air 
Force undertook all the early photography for mapping purposes — an arrange- 
ment which was very satisfactory as the Force possessed resources for experi- 
menting in all phases of the flying and photographic problems, the crews received 
very valuable training in air photography, and, at the same time, photographs 
were being produced to form the basis of urgently needed maps. 
THE SURVEYS RESEARCH COMMITTEE 
In an endeavour to assist the pioneer developments of mapping in Canada, 
the National Research Council in 1933 established an Associate Committee on 
Survey Research. Its first chairman was General A. G. L. MacNaughton 
(then Chief of the Canadian General Staff) who had always exhibited a keen 
interest in photogrammetry, and the first secretary, A. M. Narraway. On the 
Committee were representatives of the survey organizations, the Royal Canadian 
Air Force and the National Research Council. The Council had well-staffed 
laboratories and workshops to permit specialized investigations and the con- 
struction of sample instruments of various types. Undoubtedly the application 
of new ideas to Canadian photogrammetry has been stimulated by the close 
liaison possible with this Committee, especially in the way of sponsoring and 
facilitating major investigations needing the co-operative effort of different 
organizations. At various times it has been actively engaged in such subjects 
as the development of mapping methods, cameras and photography, photographic 
aircraft, Shoran, radio-altimetry. 
Later, in 1942, a similar committee was established to co-ordinate purely 
photographic research, and the two committees continue to work in close co- 
operation on photogrammetric problems. Investigations aimed at the develop- 
ment of new and more efficient technique are constantly in progress in the 
various government services engaged in the different branches of photogram- 
metry, and recently a unit has been established in the National Research Labora- 
tories for centralizing research on various aspects of plotting and allied problems 
in co-operation with these services. 
— 
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