THE FRESH-WATER LOCHS OF SCOTLAND. 



113 



Temperature Observations. ^Temperature observations gave the 

 following results : 



Surface 



10 feet 



11 



12 



13 , 



59OFahr. 

 59 O 

 58 -8 

 55 "8 

 55-0 



This series shows that the upper 10 feet of water had a uniform 

 temperature, but between 11 and 12 feet there was a fall of 3, the 

 extreme range from surface to bottom being 4. 



Loch Freuchie (see Plate XXXI.). Loch Freuchie (or Fraochie), 

 near Amulree, is a very pretty loch amid pastoral scenery, the grassy 



FIG. 25. LOCH FBEUCHIE, LOOKING S.E. FBOM BBIDGE OVER INLET. 



(Photograph by R. Dykes.) 



shores sloping gently up on both sides, with here and there patches of 

 wood. It was formerly a good trout loch, but in recent years it has 

 been overrun by pike ; steps have been taken, however, to keep down 

 the pike, and the fishing is now improving. It flows by the river Bran 

 into the river Tay at Dunkeld. Loch Freuchie trends in a north- 

 west and south-east direction, widest in the north-western half and 

 narrowing towards the south-east end. It is If miles in length, with a 

 maximum breadth of nearly half a mile, the mean breadth being about 

 one-third of a mile, or 18 per cent, of the length. Its waters cover an 

 area of about 348 acres, or over half a square mile, and it drains an 

 area 55 times greater an area of over 23 square miles. Nearly 90 

 soundings were taken, the maximum depth observed being 62 feet. The 

 volume of water contained in the loch is estimated at 346,564,000 cubic 

 feet, and the mean depth at 23 feet, or 37 per cent, of the maximum 



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