20 



Canadian Forestry Journal, January, 1919 



firturi' l)y Ciiui'tcsy Act jh Pu'j. Co. 

 Muscular Canadian Luniberjacl(s at Worl( in a French Forest. 



SURVEYING BY CAMERA FROM THE AIR 



By Lieut.-Col. Cull, D.S.O., R.A.F. 

 in an address before the Geodetic Survey of Canada, December 3, 1918. 



Photographing Lakes, Rivers, Mountains, and Forest from 

 Aeroplane an Economical and Accurate Method. 



Editor's Note: — The following most interesting paper by Col. Cull will be eagerly read by 

 all rvho have developed an interest in the aeroplane and its adaptability to forest surveying and 

 fire detection. Col. Cull has a notable war record, and was brought to Canada to organize the air 

 service in connection with the Canadian naval forces. 



Before going into the detailed proposition ! 

 would like to briefly touch on the progress of 

 aviation and aerial photography, as well as to 

 submit lines along which, in my opinion, aerial 

 work could be used as an adjunct to survey 

 work. 



Early Aviation. 



As you know, some twelve years ago the first 

 flight of any practical value was carried out in 

 France by the Wright brothers. One is apt to 

 forget about these pioneers, but whatever pro- 

 gress has since been made is in no small measure 

 due to the Wrights. I was trying to get into 

 aviation myself then, and cherish, together with 

 a lot of other people, a very kindly feeling for 



them and the country to which they belong. I 

 would like to say, too, that from what I saw of 

 American pioneer flying officers in France; and 

 latterly in my dealmgs with the United States 

 Naval Aviation authorities over here, in con- 

 nection with the formation of the Royal Cana- 

 dian Naval Air Service, I have seen nothing to 

 chansre those opinions. A few months before 

 hostilities ceased, at a rather critical submarine 

 time, they were very generous and of the great- 

 est assistance to us over here in connection with 

 the Atlantic coast. 



During the four years preceding the war fairly 

 rapid progress was made in aviation, particularly 

 by the Germans, who took it up along methodical 



