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bers. each of which makes use of a staggered regimentation, en 

 echelon, to gain the advantage of each other's slip streams, and 

 that the squadrons themselves are also arranged for the same 

 purpose. The lead birds in such regimented flights are relieved 

 by others from time to time, as they have to "split open the air" 

 (as may be said) and so get weary sooner than those behind. 

 They then fall to the rear of the line where, provided they keep 

 in formation, they have to expend hardly any effort at all. being 

 swept along within the turbulence created by those ahead. These 

 birds arrange for the squadrons to aid each other in the same 



way. so that pairs of them form compressed rhombs and keep 

 equidistant from each other and from surrounding pairs but at 

 a greater distance from them. Thus the air is cleft on the bias, 

 as it were, and the whole mass slips through with much less 

 expenditure of effort by the majority than would have been 

 necessary in a purely haphazard flight. 



Although we have spoiled the face of a large part of this 

 continent, there are endless happenings all about us every day 

 that can only be called miracles. Each natural country or prov- 

 ince has its own particular wonders to offer. 



