ON ATMOSPHERIC WAVES. 
363 
9. Wave-crest of the 4th apparent- Wave-crest of the 5th obliterated. Rise counted 
from the posterior trough of wave-crest of the 4th. 
10. Barometer* still risii^. Wave-crest of 5th scarcely discernible. 
11. The smallest rise, Birmingham excepted; harometert still rising. Wavc-crests of 4th 
and 5th very discemihlc, with a funncl-ahapcd depression lietween tlieoi. 
12. Barometer; still rising. Undulating rise. 
13. Tlie termioatioii of tliis rise is merely a bulge on the upward curve. The barometer 
continued rising until 9 a.m. of the 9th. 
14. This appears to have been the greatest rise at this station during the period of the ge¬ 
neral rise. We have before referred to the auontHlous character of this curve. 
15. Newcastle and Bitmiugliam ctirves In many rcipMU similar. 
Id. 
17. Uointermpted rise to maximum of the lUth; termination of rise only a bulge. 
19. An almost unintorupted rise to the maximum of tbo lOth. Two bulges on the 7th 
and 8th. 
19. An muntetrupted rise until 9 p.w. of the 8th. The epoch of the cessation of the rapid 
rise at the northern sutlous. 
20. An uninterrupted rise. 
Distribution of prtssure . — We have already noticed the direction of the 
wavc-cruat of tbo Itb across England and .Scotland. Arbroath is still the 
highest point, indicating the position of the slow-moving crest (I.); its alti¬ 
tude is about • 10 higher tlian the erwt of tlie second south-west wave. About 
midnight of the 7th the curves at Ramsgate and Arbroath intersected from 
tbc transit of the trough of the north-west wave. 
Contemporaneous with the slow-movij>g crest passing from Arbroath to 
.Stornoway, we have a depression passing from Newcastle to Dumfries. We 
have already noticed Galway as the point of greatest depression ; it is highly 
probable that the elevation south-west of this depression raised London and 
Ramsgate above Limerick. 
Although the barometer passed a moxirauin on the 8th, which is more or 
less apparent in all the northern curves, It continued to rise over the whole 
sirca until the 9tb, when a fall occurred in tiie south-east. The passage of 
the maximum just preceding this fall, marks the true crest of the symmetrical 
wave. The following Table exhibits the epochs of transit, and clearly indi¬ 
cates the passage of the crest from the south-west. 
Table VIIl. 
Epochs of transit of the first Crest, the true summit of the Great Symmetrical 
Barometric Wave. 
November 9. Previous to 9 p.m. ; — 
Jersey.Nov. 9. 
November 9. At or near 9 r.M. :— 
Helstone......Nov. 9* 
Weston.Nov. 9. 
London ............Nov. 9. 
Hobbs’ Point . Nov. 9. 
November 9. About midnight:— 
Cirencester . Nov. 9. 
November 10. About 3 a.m. : — 
Gloucester .. .....Nov. 10. 
November 10. At 6 a.m.; — 
Nottingham .Nov. 10. 
November 10. At or near 9 a.m. ; — 
Ramsgate ...... ..Nov. 10. 
* Reduced to the level of the sea. 
t The true crest appears to have passed Ramsgate earlier. This rise appears to have been 
very local. 
5 P.M. 
9 P..\i. 
f) P.M. 
...30-379* 
...30-110 
9 P..M. 
9 P.M. 
12 night. 
.3 A.Xf . 
,,..30-340 
6 A.M. .. 
9 A.M. 
,..30-560t 
