Loch Lomond during the Autumn of 1885 325 



fathoms. \Yith a view of further investigating this body of 

 water, I returned on i6th October to the Rovvardennan and 

 Stuckgovvan stations, and took the temperature at 20, 22^, 

 jj.J, and 30 fathoms, using, at 20 and 30 fathoms, the same 

 thermometers as had been used the day before. As the tem- 

 peratures at 20 and 30 fathoms were found very different from 

 those observed the day before, the observations in the Ro\var- 

 dennan locality were repeated close to the east side of the loch, 

 the usual station being nearer the west side. The following 

 table gives the temperatures observed on i6th October and 

 also the corresponding ones of I5th October. 



TABLE VI. Temperatures on Steepest Gradient at 

 Rowardennan and Stuckgowan, ibth October 1885. 



These results go to areeiitnate tin- tart !><>nir nut by all tin- 



observation- quoted in this paper, and hy all tin- derivations 



ii I have been able to make in other lake-, namely, that 



lly during the warm half of t 

 69, '-ven at depths where there is no rapid 

 ehan-e . re, are not p ! it have man 



tures and in S, The-e nne\ cnnesses are partiru: 



ii' region of most rapid change of tempera! 



