326 On the Distribution of Temperature in 



or on the steepest gradient of the temperature curve. Here 

 the movements of the thermometer a few yards in a horizontal 

 direction may place it in water of very different temperature. 

 On both days a fresh breeze was blowing, and, though it was 

 possible to keep station very satisfactorily from a nautical 

 point of view, the station kept was an average one that is, 

 instead of being a point, it was an area, and an area perhaps 



TABLE VII. Observations in Loch Lomond, 

 1 4th November 1885. 



20 to 30 yards long by 10 to 20 yards wide. The investigation 

 of the body of water having the steepest temperature gradient 

 is very interesting, but it should be attempted only under the 

 most favourable circumstances either the weather should be 

 perfectly calm, or the boat should be anchored. In future 

 work the minute delineation of the steepest part of the tem- 

 perature gradient should have an important place. 



