METEORLOGICAL
Instruments used for altitudes:—
Pocket aneroid, corrected +0.55, “R.G.S”
Casella’s Alpine Sympiesometer, corrected to 67° (F.).
N.B.— Returning to Fernando Po, found that part of the liquid has lodged in upper bulb, and therefore corrected index error by standard aneroid 1.15 (Symp. = 29.258, and standard, 30.400).
Observations at the Congo mouth in February, 1863 (from log of H.M.S. “Griffon”).
Thermometer Barometer Winds Place
Engine in sea. Force & Direction
Room. A.M. P.M.
86° 76° 29.90 (1) S.E. (1) N.N.W. Loanda.
92° 77° 29.92 (1) S.W. (2) W.N.W. En route to Congo.
108° 76° 29.90 (1) S. (3) S.S.W. En route to Congo.
86° 78° 29.90 (2) S. (3) W. En route to Congo.
88° 78° 29.90 (2) S.W. (2) S.S.W. En route to Congo.
94° 80° 29.90 (2) S.E. (2) S.W. En route to Congo.
90° 83° 29.90 (2) S. (2-3)S. Congo.
90° 80° 29.90 (0) Calm (1) W. Congo.
(Signed) F. F. Flynne,
Assistant-Surgeon in Charge.
Place and Date. Time of Day. Thermometer. Symp. Remarks.
9th September 6 a.m. 65° 28.00 cor. 29.12 Cold morning, light wind from N.N.E.,
Banza nokki 9 a.m. 72° 27.70 cor. 28.82 threatened rain, 8 a.m.; noon misty,
on hills above Noon. 78° 27.90 cor. 29.02 day hazy; 3 p.m., sun hot, wind cooler
river 3 p.m. 80.5° 27.85 cor. 28.97 from west; evening, stiff sea-breeze,
6 p.m. 72° 27.90 cor. 29.02 people complain of cold; night, heavy
dew.
10th Sept. 6 a.m. 67° 27.90 cor. 29.02 Misty morning, warm at 9 a.m., wind; noon,
Same place, 9 a.m. 75° 27.75 cor. 28.87 hot sun, high sea-breeze; 3 p.m., hot
Nokki. Noon. 83° 27.85 cor. 28.97 sun, cool west wind; cloudy evening;
3 p.m. 85° 27.75 cor. 28.87 windy night, dew cold and heavy.
6 p.m. 74° 27.85 cor. 28.97
Altitude of Nokki above sea, 1,430 feet.
11th Sept. 9 a.m. 77° 27.70 cor. 28.82 Misty morning, warm but clouding over;
Banza Noon. 87° 27.55 cor. 28.67 at noon high sea-breeze, glare and hot
Chingufu 3 p.m. 83° 27.45 cor. 28.57 sun, when clouds break 97° in sun,
above Nokki; 6 p.m. 73° 27.50 cor. 28.62 2 p.m.; 3 p.m., high sea-breeze up
see also 18th river; 6 p.m., cold sea-breeze, cloudy
and 19th Sept. sky.
Altitude of Chingufu, 1,703 feet.
Chingufu
12th Sept. 6 a.m. 65° 27.70 cor. 28.82 Clear fine morning; high west wind
First observation Nekolo. at 6 a.m.; pocket aneroid 29.00
Chingufu, 9 a.m. 76° 28.50 cor. 29.62 Shady verandah facing to west; at
others at Nekolo Noon. 84° 28.35 cor. 29.47 noon aneroid 30.05; 3 p.m., hot
lower down & near 3 p.m. 85° 28.40 cor. 29.52 sun, westerly breeze, few clouds;
river. 6 p.m. 77° 28.30 cor. 29.42 6 p.m., very clear, east wind
strong; no dew at night.
Negolo Nkulu.
13th Sept. 6 a.m. 70° 28.45 cor. 29.57 Close cloudy morning; 9 a.m.,
Negolo and near 9 a.m. 77° 28.50 cor. 29.62 alternately clear and cloudy,
Congo River. Noon. 90° 28.45 cor. 29.57 glare, no wind; noon bright and
sultry, no clouds; 3 p.m., in shady
cove 10 feet above river; rain at
5.30 p.m., lasted two hours;
dispersed by westerly breeze.
Cove near river.
3 p.m. 94° 29.10 cor. 30.22
Height of Negolo, 828 feet.
Left bank.
14th Sept 6 a.m. 74° 29.30 cor 30.50 Dull, warm, and cloudy.
Right bank.
Banza Vivi on 9 a.m. 84° 29.35 cor. 30.57 Aneroid 30.60, dull day.
hills above right Noon. 80° 28.95 cor. 30.07 Anerodi 30.10 dull day, very little
bank. 3 p.m. 84° 28.35 cor. 29.47 breeze, village shut in, clouds
6 p.m. 79° 28.85 cor. 29.97 from west
Banza Vivi.
15th Sept. 6 a.m. 74° 29.15 cor. 30.25 Thick drizzle from west, no wind.
At Banza Simbo, half way up Vivi range, aneroid 29.42.
Banza Nkulu Noon 78° 28.10 cor. 29.22 Under tree facing north; puffs of
above rapids. west wind, threatened rain, none
came.
6 p.m. 75° 28.10 cor. 29.22 In veranda facing north-east; clear
night, heavy dew.
Banza Nkulu.
16th Sept. 6 a.m. 69° 28.20 cor. 29.32 Grass wet, heavy dew, rain
threatened, aneroid 29.50.
100 feet above rapids.
7.30 a.m. 73° 29.25 cor. 30.37 Aneroid 30.55.
Banza Nkulu again Noon. 80° 28.10 cor. 29.22 Aneroid 29.55, dull, cloudy, rain
threatened.
3 p.m. 75° 28.00 cor. 29.12 Dull day, clearer towards evening,
6 p.m. 75° 28.00 cor. 29.12 very heavy dew.
Altitude of Nkulu, 1212 feet.
Altitude of Yellala Rapids, 390 feet.
Nkulu.
17th Sept. 5.30 a.m. 67° 28.15 cor. 29.27 Grey, cool; threatens sunny day.
Right bank of river.
9.20 a.m. 77° 29.30 cor. 30.42 Cool west wind.
In canoe on river below Little Rapids.
10.50 a.m. 81° 20.20 cor. 30.32 Aneroid 30.57(59)
Left bank 20 feet above water, under fig-tree facing north.
Noon. 81° 29.20 cor. 30.32 Aneroid 30.50.
Negolo Town 3 p.m. 83° 28.30 cor. 29.42 Day hot, aneroid in verandah 30.50.
Banza Chingufu.
6 p.m. 71° 27.55 cor. 28.67 Clear evening, misty towards night,
young moon with halo.
Height of river below Vivi Fall, 195 feet.
18th Sept. 6 a.m. 65° 27.60 cor. 28.72 Cool, grey, no wind.
At Chingufu as 9 a.m. 76° 27.65 cor. 28.77 Strong land wind, from east, no
before. sun, heavy clouds N.E.
Noon. 90° 27.50 cor. 28.62 High west wind, hot sun.
3.30 p.m. 88° 27.35 cor. 28.47 Clear at 1 p.m., thermometer 100°
little wind, sun hot.
6 p.m. 77° 27.45 cor. 28.57 Clear evening, no dew, misty moon,
high sea-breeze at night.
19th Sept. 6 a.m. 67° 27.70 cor. 28.82 Still grey morning, no wind.
At Chingufu. 9.30 a.m. 76° 27.65 cor. 28.77 Lighter, wind from west.
Noon. 81° 27.60 cor. 28.72 Dull, light west wind.
3 p.m. 88° 27.45 cor. 28.57 Cloudy and sunny, west wind.
6 p.m. 72° 27.50 cor. 28.62 Clear, fine, little wind.
How do these agree with September 11?
Chingufu.
20th Sept. 6 a.m. 69° 27.70 cor. 28.82 Fine, clear, and still morning.
On river.
Down river 9 a.m. 82° 29.35 cor. 30.47 Hot day, aneroid 30.55; at 10 a.m.
29.85.
Off Chacha village on river.
Noon. 87° 29.35 cor. 30.47 Sea-breeze, sun hot, but obscured
by smoke of bush fires.
On river.
3 p.m. 86° 29.20 cor. 30.32 Aneroid 30.40, stiff sea breeze.
Last observation taken about 5 miles above Boma.
21 Sept. 9 a.m. 76° 29.30 cor. 30.42 Cool, cloudy, pleasant.
At Boma. Noon. 81.5° 29.25 cor. 30.37 Dull, threatens rain.
3 p.m. 86° 29.25 cor. 30.37 Dull, muggy, cloudy.
22nd Sept. 6 a.m. 77° 29.10 cor. 30.22 Dull, cloudy, cool; instrument in
Boma. verandah facing south-west.
9 a.m. 76° 20.30 cor. 30.42
Noon. 84° 29.30 cor. 30.42 Dull and warm.
3 p.m. 84° 29.10 cor. 30.22 Very dull, strong sea-breeze comes
up in afternoon, and lasts till
9 p.m.
6 p.m. 79° 29.20 cor. 30.32 Dull night.
Mean altitude of Boma (commonly called Embomma), 73 feet.
23rd Sept. 6 a.m. 70.5° 29.20 cor. 30.32 Dull morning
Boma. 9 a.m. 81.75° 29.25 cor. 30.37 Clear and sunny.
3 p.m. 92° 29.10 cor. 30.22 Clear, hot, and sunny.
6 p.m. 79° 29.15 cor. 30.27 High wind, sun.
24th Sept. 6 a.m. 74° 29.20 cor. 30.32 Cool and clear.
Boma. 9 a.m. 81° 29.30 cor. 30.42 Hot and clear.
12.30 p.m. 93.75° 29.10 cor. 30.22 Hot and clear.
3 p.m. 93.57° 29.05 cor. 30.17 Very strong sea-breeze till late at
night.
6 p.m. 79.5° 29.15 cor. 30.27 Very strong sea-breeze till late at
night.
25th Sept. 6 a.m. 74° 29.20 cor. 30.32 Dull, no sun, rain threatened.
Noon. 81° 29.20 cor. 30.32
3 p.m. 83° 29.19 cor. 30.31 Aneroid 30.15.
6 p.m. 78° 29.10 cor. 30.22 Dull, no sun, wind subsided at
night.
Porto da Senha at factory.
26th Sept. 6 a.m. 78° 29.25 cor. 30.37 Aneroid 30.62, day clear.
9 a.m. 76° 29.30 cor. 30.42 Aneroid 30.40, hot sun.
On passage in canoe down river.
Noon. 87° 29.20 cor. 30.32 Aneroid 30.45.
3 p.m. 95.5° 29.00 cor. 30.12 Aneroid 30.52.
Mean altitude of Porto da Lenha, 38 feet.
28th Sept. 6 a.m. 71.25° 29.15 cor. 30.27 Dry, cloudy morning.
Banana factory, 9 a.m. 75° 29.20 cor. 30.32 Calm, land and sea breezes very
mouth of river, regular.
60 feet above Noon. 81° 29.10 cor. 30.22 At noon thermometer at seaside in
sea level. sun (overcast) 83.5°.
3 p.m. 75.5° 29.05 cor. 30.17
6 p.m. 74° 29.05 cor. 30.17 Symp. (corrected) 30.32°.
29th Sept. 6 a.m. 73° 29.20 cor. 30.32 Weather calm; at seaside in sun
same place. 9 a.m. 80° 29.20 cor. 30.32 (overcast) thermometer 74.5°.
Noon. 83° 29.10 cor. 30.22
3 p.m. 80° 29.15 cor. 30.27 Symp. (corrected) 30.32°.
6 p.m. 74° 29.05 cor. 30.17 Night cold and windy.
30th Sept. 6 a.m. 71° 29.20 cor. 30.32 Clear weather, high wind.
same place. 9 a.m. 79° 29.15 cor. 30.27
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