Proceedings. 45 
plants now grow in Denmark. The Beech has probably been 
dominant there from 2000 to 10,000 years. 
The relics of raan’s work found in the bogs shows that the 
iron age coincides with the surface of the bogs; the bronze 
age goes down to the layers of oak ; the flint age to the bottom 
of the bogs. 
In Norway flints have been found within a foot or two of 
the surface of the bogs. 
Mr. Brown stated that the most probable explanation of the 
cause of the alternations is found in the precession of the 
equinoxes, each period occupying 21,000 years. 
The following notes were presented by Mr. W. H. Tyndall :— 
Mezrzorotocy, Oxrorp Roan, Rupuitt, for the year 1896. 
JANUARY. 
The Barometer during the month ranged high. For 29 days 
it reached 30 inches and upwards ; the maximum being 30°86 
inches on the 30th, the minimum 29°40 inches on the 14th. 
The average of the month 30°34inches. A sudden fall occurred 
from the 13th, when it stood at 30 inches, to the 14th, when it 
fell to 29:40 inches. This was the only violent fluctuation 
observed during the month. 
Thermometer.—The temperature was above the average by 
about 4degrees. The maximum reached 50°5 on the 15th and 
17th; and the minimum fell to 28° on the 19th and 29th. The 
average temperature observed for this month was 39°87. At 
no time did frost continue throughout the day, nor was the 
variation in temperature great day by day or night by night. 
The month was unusually mild; but on ten nights the tempe- 
rature fell to freezing-point and under. 
Rain.—But little rain fell during the month, only ‘98 of 
an inch during 11 days; the average fall for January being 
2-85 inches, observed over a period of 30 years. On nine con- 
tinuous days, from the 3rd to the 11th, no rain fell. 
No snow of measurable quantity fell during the month. In 
a meteorological point of view the month passed very quietly. 
