1016 Wisconsin Academy of Sciences, Arts, and Letters . 
EXPLANATION OF PLATE LXVI. 
This plate shows the movement of temperature in Loch Ness, 
Aug. 14-21, 1904. In the heading of the diagram, the first line gives 
the hour of the day; N represents noon, M, midnight. The second line 
gives the direction of the wind and the third gives its force. Temper¬ 
atures are recorded in Fahrenheit degrees and depths in feet. The 
data are taken from Wedderburn ’07, pp. 472-474. In this paper the 
temperatures are recorded for intervals of 25 feet. From these data 
the position of the full degrees has been platted, assuming a uniform 
temperature gradient in each 25-foot stratum. These points are in¬ 
dicated by small circles, and the successive positions of each degree 
are connected by straight lines. The lines representing 45°, 50°, 55° 
are made heavier than the others. 
Thus the diagram represents the movements of the isotherms in 
the water, as influenced by sun, wind, and currents. 
