. Canadian forestry journal. Forests and forestry -- Canada Periodicals. CaiiadicDi Forestry Magazine, October, ip20. 443 stead of taking them in tlie previous win- ter, thus doing away with spoilage and the cost of insurance and the labor neces- sary to watch them. Then, too, it will not be necessary to build large depots from which, oftentimes, quite long hauls to separate camps must be made, but provisions and gear can be put right down at each camp. In the purchase of lands for other thin logging purposes, aerial photos are invaluable, giving as they do, ALL the information required. Are A
. Canadian forestry journal. Forests and forestry -- Canada Periodicals. CaiiadicDi Forestry Magazine, October, ip20. 443 stead of taking them in tlie previous win- ter, thus doing away with spoilage and the cost of insurance and the labor neces- sary to watch them. Then, too, it will not be necessary to build large depots from which, oftentimes, quite long hauls to separate camps must be made, but provisions and gear can be put right down at each camp. In the purchase of lands for other thin logging purposes, aerial photos are invaluable, giving as they do, ALL the information required. Are Aerial Photos Reliable The aerial camera is going to be more and more indispensible. So far as our The technic of reading these pictures and of making estimates from them is being carefully and thoroughly studied and a regular dictionary being built up. Much ground work will be carried out this winter, especially in the estimation of quantities from the photos. The Seaplane is Best Type The following general conclusions can be drawn from the experience gained thus far. For work in country where there are many lakes, the seaplane is the be si type of machine. The float type has not proved satisfactory, as the floats are very fragile and easily become water- logged. The seaplane is structurally. "The actual number of trees can be ; This photograpli gives a good idea of what an air photograph discloses. studies have gone, the types of timber and land can be accurately determined. The actual number of trees in the crown rover can be determined and a fair idea of the general size of the stand obtained. Per forest maps they are inlinitcly bet- ter than ground surveys, giving all the information needed rapidly and accur- ately and in a form which everyone can easily learn to understand. Instead of the information being stored up in a man's head or in his notes which are often colored by his personal idiosyn- cras}'. it is always available and leaves nc room for var
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