Figure 32,--Sounding Brooks Lake with portable echo sounder. Transducer rod is on right, over side of boat. 

 Point of land in background is reference point (transect 41). 



Temperatures of Brooks Lake water were resulted in warming of the sampler and Its 



taken with a pocket thermometer which was contents whenever the lake water was colder 



immersed in each sample immediately after than overlying water through which it passed 



it reached the lake's surface. This procedure en route to the surface. (See comparative 



50 



