68 REPORT—1843. 
«(B). Features of the small undulations (continued). 























Geneva. Cadiz. 
Vertex 22nd 2am. Vhour 002) Vertex 29nd 4a.  Shours -022 
= 4 2 032 
a i 5 i 1 fd 026 3. 89 855, 4 “046 
Sie ALY TOMGAET PSUUMAE "" k WARS Mec ane ac rth hla 
8 2 007 
de ni , ¥ id Gibraltar. 
urin, 
Vertex + 22nd 2 a.m. 2hours ‘009 | Vertex+ 22nd 8 a.m. 3hours ‘012 
ee 45 oy Ity ‘004 | eaten 10 ” 2 ” “029 
See ee fae Avs} 033 Peale canes} lpm. ait 5 008 
| 
Vertex ] + Vertex 2 — Vertex 3 + | Vertex 4 — 
Station. 
: . | Ex- : Dur. | Ex- : Dur. | Ex- E Dur.| Ex- | — 
Time. nm, sat Time. | iits. tent.|| Time. Bis!) teak. Time. Eres deat, i 
Markree i: ia Adlhs be 21 lpm. | 7 /096| 
Limerick eile ee a4 coe 2112 Noon| 6 |060} — 
Halifax... eee att Po Meee ae vee | vee 121 10 p.m. | 16 [1383 | 
Oxford... wu we | eee [21 Lem.) 7 [055 121 G6e.m.| 5 |-019 |22 Gam. | 12/103) — 
London 21 8 a.m.) 2 |018/21 1 ,, | 5 |:039}/21 6,, | 5 |018/22 3 ,, 9 |-094 
Brussels 121 1 p.m.) 7 |038|21 6 ,, | 5 |034 12112 nr.) 6 |-029 22 4 ,, 4 |-027 
Geneva.../21 8 a.m.) 2 |-019|/21 6 ,, | 10 |-064 [21 llp.m.) 5 |-050/22 1 ,, 2 |-042 
Turin ...(21 8 ,, 2 |-006 ||21 6 ,, | 10 |:05212110 ,, | 4 |-052 21 12n1eH7} 2 |-009 | — 
Cadiz ...|21 8 , 2 |-017|/21 5 ,, | 9 |-063||2110,, | 5 |-033 22 lam. | 8 |-0388) — 
Gibraltar |21 11 ,, 5 |060|121 5 ,, | 6 |-070}21 8 ,, | 3 |-0383 122 5 ,, 9 |-058 | 
Se err ae rE 
i I 
Small Undulations. Fall. 
Station 
Commencement.| Rise.| Fall. End. ah Commencement. bs aa End. 
Markree ...| 21 lpm. |-024|-021| 21 10 e.m 9 || 21 10 pM 20 |-404 | 22 6pm. 
Limerick ...} 21 12 Noon |:003}052| 21 9 ,, De Dl Oe aces 20 |:350 | 22 5 ,, |e 
Halifax ....| 21 10 p.m. |-032|-036} 22 8 a.m 10 || 22 8am 10 |+176 | 22 6 ,,} 
Oxford ...... 22 Gam. |014|-004| 22 10 ,, 4 || 2210 ,, 7 1081/22 5 , 1% 
London ....| 22 3. ,, 030 |-000| 22 10 ,, 7 ||. 22.10. ,, 8 |-067 | 22 6 ,,| 
Brussels ....| 22 4 ,,  |018]:000| 22 12 Noon | 8 || 22 12Noon | 6 |°021 | 22 6 ,, | 
Geneya...... 22 1 ,, |002}-000) 22 8 a.m 7 || 22 Sam. | 10 |'075 | 22 6 ,, 
Turin ...... 21 12 nreut}038 |000| 22 7 ,, 7 ae lee 10 |-082 | 22 5 ,, | 
Cadiz,’ .....: 22 lam. |022|-032| 22 10 ,, 9 |} 22 10 ,, 8 |:102 |} 22 6 ,, 
Gibraltar 22 5am. |012|021| 22 lpm. 8 || 22. le. 41:055 | 22 5 ,, |= 


Sept. 1836.—Markree, Limerick, Halifax, Oxford, London (with Green- 
wich and Blackheath), Brussels, Hanover, Geneva, Turin, Gibraltar, Cadiz. 
This series affords a fine instance of a fluctuation traceable over the whole 
area embraced (though gradually modified from station to station), under cir- 
cumstances permitting us to determine the direction, breadth, and velocity of 
transference of an atmospheric wave on a large scale with considerable cer- 
tainty. . 
The diurnal oscillations are not only perceptible, but form pretty conspi- 
cuous features of most of the curves. To begin with the southern stations :— 
At Gibraltar the first projected minimum (that of 4 ».M.), and the second or 
morning minimum is thrown somewhat later than its regular epoch (to 5 or 
6 a.m.). Both the maxima are distinct. At Cadiz the first minimum is con- 
cealed by a casual minimum superposed on it. The adjacent maximum (that 
a 
