THE FRESH- WATER LOCHS OF SCOTLAND. 87 



Temperature Observations. Temperatures were taken in the deepest 

 part of the loch, with the following results : 



Surface ..................... l30-OFahr. 



.5 feet ... ............. . ... 60-0 



Loch Kennard (see Plate XXVI.). Loch Kennard, a good fishing 

 loch abounding with small trout, is situated in Strathtay, and flows 

 into the river Bran by the Ballinloan burn. Its shores are nearly all 

 wooded, and where not planted with trees the low hills are covered 

 with heather. It is peculiar in outline, somewhat resembling that of a 

 young mushroom, the stem pointing west and the apex of the crown 

 pointing north-east. It is over two-thirds of a mile in length, and over 

 one-third of a mile in maximum breadth, the mean breadth being over 

 one-sixth of a mile, or 26 per cent, of the length. Its waters cover an 

 area of about 77 acres, or nearly one-eighth of a square mile, and it 

 drains an area seven times greater, or nearly nine-tenths of a square 

 mile. Nearly 50 soundings were taken, the maximum depth observed 

 being 72 feet. The volume of water is estimated at 108,439,000 cubic 

 feet, and the mean depth at 32J feet, or 45 per cent, of the maximum 

 depth. The length of the loch is 50 times the maximum depth and 111 

 times the mean depth Loch Kennard forms a simple basin, with here 

 an'd there minor undulations of the bottom. The deepest water (72 feet) 

 is found in the centre of the widest part of the loch, to the east of the 

 constriction in its outline ; in the middle of this constriction a depth of 

 70 feet was found, but immediately to the west the bottom rises to 50 

 feet beneath the surface, and falls again further west to a depth of 

 63 feet. The 25-feet basin is half a mile in length and over a quarter 

 of a mile in maximum width, while the 50-feet basin is over one-third 

 of a mile in length. The area of the lake-floor covered by less than 

 25 feet of water is nearly 30 acres, or 38 per cent, of the entire area of 

 the loch; that covered by water between 25 and 50 feet in depth is 

 about 33 acres, or 43 per cent. ; while that covered by more than 50 

 feet of water is over 14 acres, or 19 per cent, of the total area of the 

 loch. These figures show that the average slope is steeper between the 

 shore and the 25-feet contour-line than between the 25-feet and 50-feet 

 contours. Loch Kennard was surveyed on May 29, 1903 ; the elevation 

 of the surface of the water above the sea was not determined. 



Temperature Observations. Temperatures were taken in the deepest 

 part of the loch, with the following results : 



Surface ..................... 56'7 Fahr. 



ofeet .................... 51-0 ,, 



10 ................... 48-3 



2.-> ,, ..................... 46'0 



.->n ,, .................... 45-5 



72 . 45 3 



