634 MR E. M. WEDDERBURN 
TEMPERATURE OBSERVATIONS. 
Table IT. contains nearly all the temperature observations which were made, and as 
they were all made within four weeks, it will be evident that the number of observa- 
tions made daily was very considerable. ‘Temperature-depth diagrams were drawn by 
the observers from day to day, so that the author was able to keep in touch with what 
was going on and to direct attention to any peculiarities which were observed. Of 
Medias te [Thursday [Setar ToT 
UP a EAETS TEEEES sA0RE] (SERED SEEEYS JES¥0! J20KE! VESEED SNEEE UEEIE!/2S21 
2 == = SS: f=} = 7 
AH Baran HATE 
Fic. 5.—Thermograph record from Tighnadalloch. 
course, in any investigation of lake temperatures it is of the greatest importance to 
have a record of the meteorological conditions, and especially of the state of the winds. 
The Dines anemograph was, therefore, a great acquisition. The upper portion of fig. 15 
shows (1) the direction of winds during the month, and (2) the wind pressure as esti- 
mated from the anemograph records, and it will be convenient to refer to this diagram 
in what follows. The following table gives the number of hours’ sunshine recorded, 
while fig. 5 gives the thermograph record taken at Tighnadalloch, which is fairly typical 
for the loch ;— 
