METEOROLOGICAL OBSERVATIONS ON BEN NEVIS. 251 
TABLE I.—continued. 
1898 | Jan. | Feb. |March| April | May | June | July | Aug. | Sept. | Oct. | Nov. | Dec. | Year 
Extremes of Temperature, Minima. 
° ° °o ° ° ° | ° ° ° ° ° | ° ° 
Ben NevisOb-} 21:2 9:6 | 131 | 152 | 19°38 | 26°5 | 30°1 | 29:0 | 29°0 | 23:5 | L1-1 | 164 96 
servatory | 
Fort William | 31°9 | 26:2 | 26:7 | 286 | 32°3 | 42°8 | 42°0 | 43:7 | 35°9 | 36°0 | 21°1 | 273 21:1 
Differences .| 10°7 | 166 | 13°6 | 13-4 | 13°0 | 16°31 119 | 147 69 | 12:5 | 10°0 | 10°9 | 115 
Rainfall, in Inches. 
Ben Nevis Ob- | 27° oy 30°09 | 19°07| 10°76| 8:74) 10°37 ed 18°61 | 24°81] 13°86! 21°27) 43°65 |240°05 
servatory | 
Fort William | 14 »2 | 11-36; 7°41 err | 2-91} 4:27] 2°84! 7:30] 10°60) 6°83) 7:99) 24:01 /106°51 
Differences .| 12°86| 18°73| 11°66! 3:99) 5°83) 610| 890 | 11°31 | 14:21| 7:03 | 13:28 | 19°64 }133°54 
Number of Days 1 in. or more fell. 
Ben NevisOb-| 12 15 6 2 1 3 6 6 7 4 6 18 86 
servatory | 
Tort William 4 1 2 1 0 0 1 1 3 1 2 10 26 
Differences . 8 14 4 i 1 3 5 5 4 3 4 8 | 60 
Number of Days 0:01 in. ov more fell. 
Ben NevisOb- | 27 24 27 21 22 7 22 | 27 21 21 23 29 | 281 
servatory 
Fort William | 2 25 25 23 19 15 16 24 20 9 23 30 265 
Differences .; +1 1 4 0 3 0 1 ah al 0 3 +1 26 
Mean Rainband (scale 0-8). 
Ben Nevis Ob-; 2°5 2°3 15 2°8 2°3 1:9 30 2°9 23 ; 2:0 21 21 23 
servatory | | 
Fort William! 41 a4 at 43 4°2 3°6 34 37 36 | 38 | 36 3:7 37 
Differences .; lt | ll 19 15 19 nis 4 | 8 ik& Ls 1 16 1°4 
Number of Hours of Bright Sunshine. 
BenNevisOb-| 11 19 | 43 33 | 149] 116 | 141 44 88 76 33 | 12 765 
servatory 
Fort William 14 48 | 104 117 213 170 | 198 119 125 90 32 11 | 1,241 
Differences . 3 291 61 84 64 54 | 87 75 v7 14 aol acid! 476 
Mean Hourly Velocity of Wind, in Miles. 
Ben NevisOb-| 15 7 | 14 19 10 8 6 10 12 21 16 20 14 
servatory | | | | | | | | | | 
Percentage of Cloud. 
BenNevisOb-| 95 | 95 | 91 | 92 | 76 | 79 | 76 | 90 | 77 | 76 | 82 | 94 | 85 
servatory 
Fort William | 86 79 74 76 65 69 68 77 64 67 72 81 73 
Differences 9 16 17 16 11 10 8 13 13 9 10 13 12 
Table I. shows for 1898 the mean monthly and extreme pressure and 
temperature ; amounts of rainfall, with the number of days of rain, and 
the days on which the amount equalled or exceeded one inch ; the hours 
of sunshine ; the mean percentage of cloud ; the mean velocity ‘of the wind 
in miles per ‘hour at the top of the mountain ; and the mean rainband at 
both Observatories. The mean barometric pressures at Fort William are 
reduced to 32° and sea-level, but those at the Ben Nevis Observatory 
only to 82°. 
At Fort William the mean atmospheric pressure for the year was 
29°858 inches, being 0-014 inch higher than the mean of the forty years 
from 1856 to 1895. The mean at the top was 25°309 inches, being 
0-013 inch above the average of the Observatories made since the opening 
of the Observatory in 1883. The difference for the two Observatories 
was thus 4:549 inches for the year, being nearly the average difference of 
