78 REPORT—1905. 
TABLE I.—continued. 
1904 | Jan. | Feb. Mareh| April | May | Tune | July | Aug. | Sept. Oct. Nov.| Dec. | Year 
Number of Days 0:01 in. or more fell. 
Ben NevisOb-| 25 24 21 28 21 16 20 98 4-19 — — as sass 
servatory | peal 
Fort William | 27 20 17 26 23 14 21 26 19 a = = = 
Differences . | —2 | 4 4 2 —2 2 —1 2 0 = = = = 
Mean Rainband (Scale 0-8). 
Ben NevisOb-|{ 18 2:2 2:2 39 38 3-0 2:8 34 2:4 = — — = 
servatory 
Fort William | 3°6 4:0 38 4-4 474 49 49 47 4:2 = a = — 
Differences . 18 18 16 | 05 0-6 ci Yo heme pil 1:3 18 = so =< = 
Number of Howrs of Bright Sunshine. 
BenNevisOb-; 9°2 | 22°6 ; 696 ) 185 | 80°2 |187°3 (140-4 | 37-4 )101°5 — — _— — 
servatory | 
Fort William 64 | 31-2 |103°8 | 77-8 |141-4 [224-8 [164-0 |125°5 |132°8 — — — i 
Differences .| +2°S 86 | 342 | 59°3 | 61:2 | 37:5 | 23°6 | 88% | 31°3 — _— _— — 
Mean Hourly Velocity of Wind in Miles. 
| 18 | 19 | 16 | Le | 14 | 10 11 8 11 | — | _— | — = 
servatory 
Percentage of Cloud. 
Ben NevisOb-| 93 93 77 95 87 68 76 88 81 — —_ — _ 
servatory 
Fort William} 85 84 68 82 78 63 76 80 71 — — — ~~ 
Differences . 8 9 9 13 9 5 0 8 10 _ = = — 
The above table shows for the first nine months of 1904 the mean 
monthly pressure ; the mean and extreme temperatures ; the amounts of 
rainfall ; the number of days with rain, and of days with falls of 1 inch 
or over ; the mean rainband ; the hours of sunshine ; the mean velocity in 
miles per hour of the wind at the top of the mountain, and the mean 
cloud amount. The mean barometric pressures at Fort William are 
reduced to 32° and sea-level, but those at Ben Nevis Observatory to 
32° only. 
The difference of the mean atmospheric pressures at the two Observa- 
tories ranged from 4°644 inches in March to 4°478 inches in July. At 
the top the absolutely highest pressure during the period was 25-925 inches 
at 10 p.m. on January 21, and at Fort William 30°658 inches at midnight 
on the same day. The lowest pressures occurred at | p.m. on February 13, 
being respectively 24-017 inches and 28:419 inches. Thus the difference 
of the extremes at top and bottom were 1:908 inch and 2-239 inches 
respectively. The low mean pressures for February are noteworthy, that 
at Fort William being as much as four-tenths of an inch below the mean 
for thirteen years, and that at the top almost the lowest February mean 
in twenty-one years, February 1885, with a mean of 24°858 inches, alone 
being lower. 
The deviations of the mean temperatures of the months from the 
averages of the thirteen-year period 1891-1903, are shown in Table IT. :— 
TaBLe II. 
Fort Top of Fort Top of 
William. Ben Nevis. William. Ben Nevis. 
fe) ° 
Tanoatry =e = Aereeet June _ St, Sige eae 
February . . . —10 —2'3 July. - : . +05 +14 
March . : . —09 —12 August . : . —13 —1-4 
April s 3 . +02 —0°6 September ; . +01 + 0-4 
May. : . OS —1-0 
