TEMPERATURE OBSERVATIONS IN LOCH EARN. 



753 



For the purpose of comparing the two kinds of current-meters the observations 

 at 20 metres about 15 h. 20 m. are useful. The Ekman meters indicate a current 

 mainly from the north-east of 2*5 cms., and the new meter also gives a north-easterly 

 current with a velocity of 2 '8 cms. This observation indicates that the observations 

 with the new meter are comparable to those made with the Ekman meters. 



The most interesting of the observations is that at 20 metres commencing at 

 13 h., which gave a velocity of 6 "2 cms. The directions of the currents were mainly 

 westerly, i.e. in the same direction as the wind. No temperature observations are 



TABLE III. 



Observations with New Current-Meter. 







Depth 



Horizontal 



Vertical 



Velocity 







Depth 



Horizontal 



Vertical 



Com- 

 ponent. 



Velocity 



Date. 



Hour. 



in 

 Metres. 



Component. 



Com- 

 ponent. 



in cms. 

 per sec. 



Date. 



Hour. 



in 

 Metres. 



Component. 



in cms. 

 per sec. 



5/8/13 



h in 



18 



8 



N. 41 E. 



6 



2-2 



14/8/13 



h m 

 20 5 



3 



N. 83 E. 



9 



3-5 



6/8/13 



10 15 



10 



S. 37 E. 







2-2 





20 25 



5 



E. 



- 8 



2-5 





10 40 



15 



N. 80 W. 







2-3 



19/8/13 



11 45 



5 



S. 75 E. 



-27 



30 





12 20 



15 



N. 12 E. 



- 3 



2-8 





12 



2 



N. 20 W. 



12 



2-5 





17 20 



5 



S. 65 W. 



90 



2-2 





14 38 



•5 



N. 88 W. 



-12 



41 



7/8/13 



12 30 



15 



N. 84 E. 



86 



2-9 



20/8/13 



13 2 



4 



S. 14 E. 



2 



2-2 



11/8/13 



18 50 



10 



N. 85 W. 



-67 



2-8 





13 45 



10 



S. 18 E. 



- 4 



59 





19 30 



10 



N. 45 E. 



-82 



2-5 





14 18 



10 



S. 38 E. 



- 4 



4-0 





22 5 



3 



N. 17 E. 



-64 



2-2 





14 32 



12 



N. 78 E. 



- 4 



3-6 



13/8/13 



11 25 



10 



N. 52 E. 



o 



3-1 





15 18 



8 



S. 66 E. 



2 



2-5 





13 40 



20 



S. 42 E. 



- 3 



52 



25/8/13 



15 20 



10 



N. 66 E. 



- 4 



4-4 



14/8/13 



1 7 



10 



S. 18 E. 



- 8 



2-8 





16 10 



12 



S. 43 E. 



- 4 



2-2 





1 45 



5 



N. 76 E. 



-10 



55 



26/8/13 



15 45 



10 



N. 28 W. 



- 14 



2-4 





2 10 



3 



S. 70 E. 



-10 



40 





16 



145 



N. 55 W. 



-16 



33 





3 10 



5 



N. 48 E. 



-22 



3-1 



29/8/13 



12 55 



15 



S. 86 W. 



-47 



2-7 





4 25 



5 



N. 12 E. 



2 



2-8 





13 5 



10 



N. 59 W. 



-22 



3-6 





4 35 



5 



N. 12 E. 



6 



31 





13 25 



10 



N. 82 W. 



-22 



37 





5 



3 



N. 12 E. 



- 8 



31 





18 10 



18 



N. 60 W. 



-18 



3'0 





5 5 



2 



N. 34 E. 



- 2 



2-4 





18 50 



10 



N. 87 W. 



-40 



2-4 





19 55 



7 



N. 81 E. 



64 



4-8 





19 

 19 10 



5 



2 



N. 1 W. 

 S. 85 E. 



-26 



-15 



32 



36 



available during the period of this observation, but it is evident that there has been 

 a disturbance of some sort in the level of the isotherms, and it is likely that the 

 relatively large velocity is due to the passage of a boundary wave or bore. Another 

 example of strong currents associated with considerable temperature changes will be 

 referred to later. 



Above 8 metres the currents are entirely in a westerly direction, from which it 

 may be deduced that they are caused by the action of the wind. Below this depth 

 there is great variation of direction, but the currents are mainly easterly, indicating 

 that they are of the nature of return currents. 



The above table contains all the observations made with the new current- 

 meter where the velocities of the current exceeded 2 cms. per second, except those on 

 22nd August. Of the 41 observations there given, 22 show currents in which the 



