288 Proceedings of Royal Society of Edinburgh. [sess. 
Amount op Cloud at the Three Stations. 
9 
10 
12 
14 
16 
18 
21 
BNO , . 
8-4 
8*0 
8*8 
9*7 
9*6 
9*4 
8*6 
io , . 
8 ”5 
8*1 
8*5 
8*8 
8*0 
8*6 
7*5 
FWO , . 
8*2 
8*1 
8*0 
8*1 
... 
... 
7*4 
A comparison of the three stations shows that at 9 and 10 a m. 
there was more cloud at the middle than at the top ; while for 
the rest of the day there *was less, and that all over there was more 
than at the base. 
Table YI. — The station w r as not a favourable one for observing 
winds, as the entire eastern horizon was blocked up by the upper 
half of the mountain. Consequently, the only winds about whose 
true direction one could be certain were those from the north, the 
west, and the south-west. Northerly winds prevailed on eight 
days, chiefly at the beginning of the month, westerly on two, 
south-westerly on four, southerly on four, easterly on two, and 
light variable airs on three days. The strongest wind blew from 
the south-west on the night of the 14th, at a rate exceeding sixty 
miles per hour. It lasted for two days at slightly reduced speedy 
and brought heavy showers of rain. 
Mean Force of Wind. — Scale , 0-12. 
9 
10 
12 
14 
18 
21 
BNO , 
1*96 
2*13 
2'11 
2*32 
2*13 
2*20 
IO , . . 
1*22 
1*20 
1*41 
1*61 
1*17 
1*41 
The highest mean wind-pressure occurred at 14 h., being about 
12 miles an hour, and the minimum at 18 h., 8 miles an hour. 
At the summit the highest was also at 14 h., 15-16 miles an hour, 
and the lowest at 9 h., 12-13 miles an hour. But, as I have 
already said, the station is not a suitable one for observations of 
