o f Edinburgh, Session 1878 - 79 . 57 
No. 2. Flagstaff on top of Town-hall bore 
N.W. gable of Palace 
Date 9th January 1879. 
N. 160° E. 
N. 1251° E. 
No. 3. Flagstaff on Town-hall bore 
Centre of Eickles Island 
Date 9th January 1879. 
N. 154° E. 
N, 63° E. 
The “ bottom ” temperature is that of the water a few inches 
from the mud. The “'mud” temperature is that indicated by the 
thermometer when resting in the mud. 
On this day* although a piercingly cold wind was blowing, the 
surface of the ice was thawing, and its structure could be observed. 
At Station No. 2, it was rendered quite opaque by air-bells, while at 
No, 3, these were present in much smaller quantity. 
No. 4. Flagstaff on Town-hall bore . . N. 147° E. 
Centre of Eickles Island . . N. 64° E. 
Date 11th January 1879. 
The ice at the surface was found to be 8J inches thick, and it 
was covered with a layer of freshly fallen snow 2 inches thick. The 
air was crisp and frosty. 
No. 5. Flagstaff on Town-hall bore . . N. 152° E. 
Centre of Eickles Island . . N. 65 j° E. " 
Date 20th January 1879. 
Here a sample of the water was collected from a depth of 10 feet 
below the ice. No temperature observations were made. 
The observations on the 6th January 1879, at Station No. 1 
were made principally with a view to test the action of the thermo- 
meter and the inverting apparatus, and also to determine at what 
depth the water would be found at the temperature corresponding 
to its maximum density. The result of this day’s operations was to 
show that the thermometer was suitable for such work, and to 
indicate two remarkable conditions of the water of the loch ; namely 
