— 
a 
aS SS 
ON METEOROLOGICAL OBSERVATIONS ON BEN NEVIS. 
years for November and December. 
the two stations. 
reduced to sea-level, those for Ben Nevis only to 32°. 
TABLE II.—Means from 1881 to 1889. 
177 
The times are strictly the same for 
The barometric observations at Fort William are 
— | Jan. | Feb. |March| April} May | June | July | Aug. Sept. | Oct. | Novy. | Dec. | Year 
Mean Pressures in Inches. 
Ben Nevis Ob- | 25°193/ 25-244 25-246) 25-259 25-322/ 25-460) 25-356! 25°363] 25-384 25299) 25-213] 25-201) 25-295 
servatory | 
Fort William | 29-823) 29-876] 29-873] 29°850) 29-866] 29-970) 29°841 oe a) 29°887| 29°840| 29-797| 29:804| 29-856 
Difference .| 4:30] 4-632] 4:627| 4°591| 4:544| 4:510| 4-485, 4°487| 4-502] 4:541| 4°584| 4-603] 4-561 
Mean Temperatures. 
5 ° 9° ° o ie} ° ° ° ° ° ° ° ° 
Ben NevisOb-| 25:1 | 22°8 | 23:0 | 26:3 | 32:1 | 38:6 | 40°3 | 39-7] 37:5 | 31°8| 27-8 | 249 | 30:8 
servatory 
Fort William | 39:0 | 381 | 39°6 | 44°8 | 48:8 | 55:1] 56:7 | 56-1 | 52:7 | 47-2 | 42:0 | 391 | 46:7 
Difference 139 |] 153 | 166 | 185 | 17-7) 165] 16-4] 16-4} 15:2] 15-4] 142] 142 | 15:9 
Highest Mean Temperatures. 
° ° ° ° ° ° ° ° ° ° ° ° 
Ben NevisOb-| 28°8 | 27:3 | 24°6 | 27-4 | 38-1 | 45-6 | 42°3 | 42:3 | 40:0] 35:0 | 30-4] 282) — 
servatory 
Fort William | 41°5 | 41°1 | 42-1 | 46:3 | 55-8 | 58:9 | 58:5 | 59:0 | 55:2 | 50:1] 448] 43:0] — 
Difference .| 12-7 | 13°8:] 17:5 | 189] 17-7] 13:3 | 16-2 | 16-7 | 15:2] 151 | 144} 148 | 15:5 
Lowest Mean Temperatures. 
° ° ° ° ° ° ° ° ° ° ° ° 
BenNevisOb-| 20°0 | 20:8 | 2u:4 | 25°4 | 268 | 35°6 | 38:6 | 37-1 | 34:8 | 28°5 | 26-2 | 202] — 
servatory 
Fort William | 35°8 | 35:0 | 37-1 | 43:2 | 45-7 | 53:3 | 54:9 | 53-2] 51:1 | 42-4] 40-2] 34:5 | — 
Difference .| 15:8] 142] 16:7] 178] 189 17:7) 163 | 161} 163] 13:9] 14:0] 14:3! 16-0 
Mean Rainfall in Inches. 
Ben Nevis Ob-| 14°36| 11°35] 884; 5°55) 7-16) 6°75{ 9:76{ 11°34] 10°76| 12:06{ 14-09] 18-00 (130-02 
servatory 
Fort William | 9:27] 8:09] 4:98} 4:02] 3:81} 3°20} 5°51] 5-46] 5:41] 6:80] 8-37] 9.82) 74:74 
Difference .| 5:09} 3:26] 3°86] 1:53) 3:35] 3:55| 4:25] 5°88] 5°35] 5:26] 5:72] 8-18] 55-28 
Greatest Monthly Rainfall. 
Ben Nevis Ob-| 17°80 | 16-94] 12°82] 9°53] 12°87) 12°31] 15-19) 18:32/ 20°87) 20°24{ 20°60; 25:29; — 
servatory 
Fort William | 12°73} 12:45) 6:25] 4-98) 639] 6-25] 10°88] 7:58| 11-71] 13:77] 13°55| 13-86] — 
Difference 5:07] 4:49] 6°57] 2°55) 648] 6:06] 4:31] 10:74) 9:16) 6:47] 7:05) 11-43] 6-70 
Least Monthly Rainfall. 
BenNevisOb-/ 7°53; 2°84{ 5°90; 3°89) 39:7; 1:94/ 4:09! 7:56{ 609/ 6:41; 899/ 10:98; — 
servatory 
Fort William | 5°63] 1:06] 3°49] 3°12) 186 | 0°84] 1°35! 3:02] 1:97] 4°04) 4:91] 7-09} — 
Difference 1:96} 0:22) 2-41] 0-77) 211) 1:10) 2-741 4:54] 4:12] 2:37) 4:08] 3:89] 2-49 
Fair Days at Ben Nevis Observatory. 
Fair Days 8 Tail LO arias |e ION.) 19 5 8 { 9 6 jz 6 { 100 
Maximum | sale No To) T8118. SO Te elete el 1s | 10. I “ae 
eet rer s org elon} af o faa tos) ow | ae 
Sunshine in Howrs at Ben Nevis Observatory. 
Sunshine in} 33 44 47 76 89 | 149 £0 58 | 68 33 23 19 719 
Hours | | 
Maximum 70 | 73 | 74 | 120 | 129 | 250 | 362 | 116 | 191 | 44 | 51 | 28 | 970 
Minimum *.| 15 18 27 52 31 55 47 9 25 Le lad 11 576 
Possible Hours| 231 | 264 | 365 | 426 | 508 | 529 | 528 | 467 | 381 | 319 | 242 | 210 | 4470 
The horizontal distance between the two stations being only about 
four miles, the monthly variation in the difference of the atmospheric 
1890. 
N 
