176 BATHYMETRICAL SURVEY OF 



of the cross lines of soundings towards both ends of the loch indicate slight 

 undulations of the lake-floor. 



The following table, showing the approximate areas between the 

 contour-lines, and the percentages to the total area of the loch, indicates a 

 larger area, and consequently on the average a gentler slope, between 25 

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



Feet. Acres. Per cent. 



Oto 25 211 ... 27-2 



25 50 263 ... 33-9 



50 75 156 ... 20-1 



75 100 93 ... 12-0 



Over 100 52 ... 6-8 



775 100-0 



Temperature observations in the deepest part of the loch on August 16, 

 1904, showed a nearly uniform temperature from surface to bottom, 

 probably brought about by a heavy gale which had been blowing during 

 the three previous days accompanied by much rain ; the readings indicated 

 a range of only half a degree Fahr. : 



Surface 60-0 Fahr. 



20 feet 59-7 



50 S9--7 



122 , 59-5 



