Loch Lomond during the Autumn of 1885 321 



of the lake was very high. Wind fresh from 'the south-v 

 The weather was so squally that it was difficult to keep station. 

 At the Ross Mill station I kept the launch head to wind with 

 a couple of oars out, but it was not very successful. At the 

 : two stations I kept her stern to wind, with a steer-oar 

 out over the bow and occasionally driving the engine astern. 

 At Inversnaul the wind was so strong that I was able to keep 

 ngine going continually dead slow astern, and kept station 

 well. 



The character of the distribution is pronouncedly autumnal, 

 OH .ling at the surface is going on rapidly while heat is being 

 propagated into the lower layers. The surface layer of approxi- 

 mately constant temperature is now about 15 fathoms thick at 

 all the stations, and the steepest gradients are found between 

 :id 20 fathoms, the maximum being 1-44 per fathom at 

 irdennan. The bottom temperature has not sensibly 

 d at Inversnaid since 5th September. In the Tarbet 

 basin the greatest difference of temperature at the same depth 



i at 20 fathoms. 



15/7* October 1885. A very fine day, with moderate north- 

 rly wind. For three days a strong northerly wind had 

 Mowing with dry weather, and for a fortnight before there 

 been a succession of cyclonic gales, with much rain, so 

 at the beginning of the week the level of the lake was 

 r than I have ever seen it, and quite three feet above it-- 

 usual summer level. The operations were all successfully 

 <1 out, the launch being kept stern to wind. 



n.^st the salient s of the distribution of tein- 



\\\\< date may be mentioned tin- r.q>id cnolin- 

 which has taken pla v in the interval -ince 22nd September, 

 the mean temperature of tl thorns having fallen 



about 3 ton Mill and In\ It will be seen that 



in the I.ns basin i :1\ quite 



unii e to bottom. llui the wai 



Ion, The temperature of 



the water iim the surface to 20 fathom^ illy uniform. 



il, in the I.i: idennan and 



Stuckgowan, in the mu h a] mely, 



M. in. ji 



