ON ATMOSPHERIC WAVES. 145 
November 7, 1842. 
Crest No. 2. 
We NE 
Crest No. 3. 
We 
Crest No. 2. Posterior slope, Crest No. 2. 
Max. Belfast.... 30°43 Max. Belfast.... 30°43 
Cork .... 30°33 Orkneys... 30°15 
Shields .. 30°27 
Plymouth 30°24 
- Bristol... .. 30°18 
London .. 30°13 }Anterior slope, Crest No. 2. 
Christiania 30°02 | 
Paris .... 29°89 J 
Slope.—Line of greatest diminution of pressure. 
Anterior slope, Crest No. 2, Belfast to Paris...... "54. 
Currents.—Wind on S.E. side of Crest No. 2, N.E. 
stn Nes 4 3, 5 W- 
advancing anterior 
3, N.W. he 
slope of new wave. 
» N.E. ” 
The crest No. 2 has now passed the Orkneys, which exhibits a falling 
barometer and the §.W. wind. The trough between crests 1 and 3 is now 
to the N.E. of Belfast and Paris; the higher readings in the south-west part 
of the area, with the lower in the north-east, clearly indicate the advancing 
anterior slope of the new wave. Diminution of pressure from Belfast to 
Christiania, *41. 
November 8, 1842. 
Crest No. 2. ; 
SW ee ON 
Crest No. 3. 
NIG saa eB 
Anterior slope, Crest No. 2. Posterior slope, Crest No. 2. 
Max. Plymouth.. 30°13 Max. Plymouth.. 30°13 
London .. 30:08 Corkins. cOOL 
Bristol .... 30°07 
Paris” ...3) 29°90 
Anterior slope of Crest No. 3. 
London...... 30°08 Christiania...... 29°67 
BeWese cy. ss 30°04: CHICBEYS 4.7 = = t= 29°63 
Shields ...... 29°97 
Line of greatest diminution of pressure. Plymouth to Orkneys .. *50 
Currents—Wind on S.E. side of Crest No. 2, N.E. 
a N.W. a 2, S.W. 
46 N.E. c 3, N.W. 
The crest No. 2 appears on this day to pass from Plymouth towards Bris- 
_ tol and London. The direction of the line of greatest diminution of pres- 
f sure varies considerably from that of the three preceding days; this partly 
_ arises from the great fall which commenced on this day at the northern ‘sta- 
_ tions, Orkneys, Belfast and Christiania; and from the anterior slope of the 
+ wave (crest No.3). The direction of the wind is closely in accordance with 
crest No. 2, passing in the direction from Plymouth towards London, being 
_S.W. on the north-west side of the crest. 
: 1846. L 
