xiv 
months being less than 2°, whilst in winter the sea was considerably warmer 
than the air. For the whole year the mean temperature of the air was 51°7 
and that of the sea 53°°9, the difference being 2°-2. 
As was to be expected the greatest contrast is observed when the range 
of temperature is considered. Thus the mean monthly range of the tem- 
perature of the air was 21°3, whilst that of the sea was only 3°5. The 
monthly range of sea temperature was much larger in summer than in winter, 
as was also that of the air, though in a less ratio. The highest air tempera- 
ture during the year was 71°-4 in July, and the lowest 34°-7 in December, the 
difference being 36°-7. The highest sea temperature was 63° in July and 
August, and the lowest 47°-5 in January, the difference being 15°'5. 
It is obviously difficult, if not impossible, to estimate precisely the effect 
of an extended area of water having a surface temperature so different from 
that of the adjacent air; or to determine what the temperature of the air at 
Falmouth would be if the sea were removed toa distance. The figures in 
the Table however would appear to support the conclusion that the influence 
of the sea in controlling the temperature of the neighbouring air is greater 
by raising it in winter than by depressing it in summer. 
Temperatures of the Air and Sea at Falmouth. 
[The minus sign is prefixed when the Temp. of the Sea is less than that of 
the Air, and the plus sign when it is greater. ] 
MaxIMuM. Minimum. 
Sea Diff. Air Sea Diff. Air Sea 
50:0 | —3:2 || 37°0 | 47°5 | + 10°5 || 45°9 
50:0] —5.5 |; 40:4] 48:5 | + 8:1 || 47°6 
51:5 | —5°6 || 82:7 | 49:0 | + 16:3 || 46:9 
52-0 | —6°8 |, 36°8 | 49:0 | + 12:2 || 48-2 
53°5 | —9°6 || 36°6 | 50°5 |] + 18°9 || 50-4 
59:5 |—10°7]] 46:0 | 52°0| + 6:0 || 56°6 
63:0 | —8'4 || 51:5 | 57°5 | + 6:0 || 61°4 
63°0 | —8:0 || 51:0 | 58:5 | + 7-5 || 60°7 
61:5 | —7°4 || 48-7 | 57°5 | + 18°8 || 57:8 
57:0 | —4°6 || 40°5 | 54:0 | + 13°5 || 50°3 
55:0 | —2°3 || 36°5 | 51:0 | + 14°5 || 48-0 
51:0 | —3°9 || 34°7 | 50°0 | + 15°3 || 46:8 
SS | | eee fe | 
| Means! 61-9 | 55-6 | —6:3 || 40-6 | 52-1 | + 11-5 || 51-7 
