Canadian Forestry Magazine, Xorcniber^ ip20 



;i7 



An oblique photograph taken from a seaplane of a section of the north shore of Lake Nipissing, Ontario. 

 The eye can easily detect how the white birch preponderates and where the patches of coniferous trees are 

 located. Experts could easily ascertain from this photograph the approximate stand of merchantable 



timber on such an area. 



within two years after the trees are de- 

 foliated. In addition to the aerial obser- 

 vations, a thorouo^h investigation of the 

 infestation is being conducted on the 

 ■ground in the areas shown to be attacked. 

 Fortunately, the damage in Ontario is as 

 yet comparatively light and is confined 

 to scatteied spots between Redwater on 

 "the T. & N.O. railway and the height of 

 land and it has not spread very far east 

 of the railway. It is expected that next 

 year the insects will spread from these 

 s])ots unless prevented by weather or 

 ■other natural conditi()n>. 



Jl'hat a /'V/.-/;/ Piscloscs. 



In connection with the survex' of the 

 forest resources of Ontario which is be- 

 ing conducted by the Commission oi 

 Conservation the opporlunit\- of study- 

 ing the forest Cl^^dilinn■^ I'ruin llie air 

 was of the greatest value. I'rmn an alti- 

 tude of 3.500 feet, it was jiossiblc in map 

 in with a reasonable degree of accuracy 

 the main forest types such as recent 

 l)urns, muskeg, softwood, hardwooil and 



mixed forests. It is possible to distin- 

 guish even some of the more conspicu- 

 ous species of trees and with a very 

 limited amount of ground work in the 

 various types, a comprehensive know- 

 ledge of the forest conditions over large 

 areas was secured in a short time. In 

 spite of the fact that on more than half 

 the (lavs adverse weather conditions made 

 aerial observation impossible, the fores- 

 ter > u ere able to map in the broad forest 

 types on 1.800 sq. miles in the three weeks 

 thev were operating around lake Tinu's- 

 kaiuing. It is estimated that to secure 

 the same information on the ground it 

 would have taken two men upwards of 

 eight months. It is hoi>ed that through 

 the co-oi)eration of the .\ir I'.oard. a 

 much more extensive aerial survey of the 

 forests of \<irthern (Ontario will be un- 

 dertaken next sunmu'i". 



When living over limagami lake it 

 was possible to see both lake Xipissing 

 and lake Timiskaming which are ninety 

 miles apart. I'rom this point, several 

 small ^n•e■^. e\identl\- settlers" clearing 



