78 REPORT—1843, 
between the line of our European stations and those of Cadiz, Gibraltar and 
Tangier, in great measure cripples the efficiency of these last, and reduces 
to a small outlying disconnected group what would otherwise haye been a 
really important integral member of our European series. Let us hope that 
on any future occasion which may arise, a spirit of scientific cooperation will 
prevent our nearest continental neighbours from suffering their country to 
remain a blank in the record. 
March 1838.—Markree, Edinburgh, Halifax, Cambridge, Oxford, London, 
Greenwich, Brussels, Kremsmiinster, Cadiz. 
Diurnal Oseillations.—Particularly prominent and indeed exaggerated in the 
curves for London, Greenwich, Oxford and Cambridge. Less conspicuous but 
yet discernible in that for Brussels; quite imperceptible at Markree and Edin- 
burgh ; and so far counteracted by causes of a contrary character at Halifax, 
that the maxima and minima throughout appear to haye changed places. 
The most important and indeed the only prominent feature in this term, is 
the comparative repose of the barometer at Brussels, and its gradually in- 
creasing disturbance in receding from that station, The Brussels curve pre- 
sents a gently undulating line, with a total range of only 0°053 (of which a 
considerable proportion is due to diurnal oscillation), and a very trifling fall 
on the whole of only 0°03. London and Greenwich, on the other hand, ex- 
hibit a rising glass, with a range of 07195, Oxford and Cambridge a more 
rapid ascent, the latter ranging over 0°260 inch, while at Halifax, Edinburgh 
and Markree the rise was very rapid, amounting in the 26 projected hours 
to 0°515 inch for Halifax, and 0°508 inch for Markree, at which two stations 
the ascent was continuous, and at Markree almost uniform, while at Edin- 
burgh (in conformity with the barometrie character of the locality) it was 
irregular and interrupted, ranging over 07442 inch in 19 hours, the series 
being broken off before the conclusion of the term, 
Departing from Brussels in other directions, we find only two very distant 
stations, Kremsmiinster and Cadiz, both marked by considerable fluctuations. 
At the former we commence with a fall of 0°283, from 6 a.m. to a minimum 
at 6 p.M., March 21 (—6"to + 6"), then a rise of 0'102 to a maximum at 
midnight, followed by another fall of 0°273 to a stationary point at 6 p.m. of 
the 22nd, a fluctuation which has nothing corresponding to it in any of the 
other stations. At Cadiz, a general ascent of 0°224 took place, interrupted 
only by two slight undulations, over the whole interval from the commence- 
ment of the series to 21 hours, Sept. 21, from which point the mercury fell 
(through 0:070) till the end of the series. 
June 1838.—Markree, Edinburgh, Halifax, Cambridge, London, Green- 
wich, Alost, Brussels, Louvain, Kremsmiinster, Cadiz. 
The general character of the curves in this term is ascending, the diurnal 
oscillations not traceable, except that for Brussels, which, when cleared of 
their visible effect, presents a smooth and nearly straight outline, with an 
ascending range of 0°238 in the 26 projected hours. This smooth character 
(which, as we have so often had occasion to remark, belongs to this locality) 
is departed from even in places so little remote as Alost and Louvain, in both 
of which subordinate but characteristic fluctuations occur, as they do also in 
the London, Greenwich and Cambridge curves. At Alost, indeed, some local 
cause appears to have acted rather powerfully, the ascent being not only in- 
terrupted, but reversed during the three hours before midnight, in the middle 
of the term. At London and Greenwich a similar cause, but of less energy, 
seems to have been in action six hours earlier, but as traces of the same action 
occur simultaneously though more feebly at both Alost and Louvain, it is not 
possible to identify them as phases of a wave in progress. 
