187&] Barometric Anomalies. 33' 



with the addition of Agra, Jhansi, and Lucknow in the N. W. Provinces-, 

 these latter being chiefly for comparison with the corresponding data of 

 1873, when there was an important barometric irregularity in the Upper 

 Provinces. 



In the table the general persistency of the baric anomalies is clearly 

 shewn, but there are three interruptions of some importance. In May with 

 a general fall greater than the average, especially in Central India and 

 False Point, Jhansi in the interior and Port Blair were exceptions, the fall 

 there being slightly less than the average. Again, in June, when the pres- 

 sure generally was considerably above the average, Orissa and Port Blair 

 changed in the opposite direction. Lastly, in September, with an unusual 

 rise of pressure every where r this was most intense at False Point and 

 Jubbulpore, and was but little in excess of the average at Port Blair,. Vizaga- 

 patam, and Madras. 



I now come to the year 1873, the rainfall of which in most parts of 

 Northern India was much below that even of the previous year, causing 

 that deficiency of the crops in parts of Bengal and the N. W. Provinces 

 which is still fresh in the recollection of all. The baric anomalies of the year 

 were in some respects identical with those of 1872, having lasted through 

 all the revolutions of the changing monsoons, but they were accompanied by 

 others which made their appearance either in the latter part of that year or 

 the earlier months of 1873, thus rendering the barometric distribution in 

 the summer monsoon more anomalous than that of any year yet recorded. 



The anomalous depression in the Northern part of the Bay of Bengal 

 and Orissa still continued : Akyab as compared with Chittagong and False 

 Point as compared with Yizagapatam and Madras were lower even than in 

 1872 : and the Orissa depression, relatively to Bengal and the Central Pro- 

 vinces, was as great, in some cases greater than in the previous year. With 

 regard to the south-east of the Bay, as represented by Port Blair, the 

 Akyab depression was somewhat greater than in 1872, but the registers of a 

 station, established during the year, in the Nieobars, seem to shew that to the 

 south of the Andamans there existed a very considerable barometric depres- 

 sion, which must have greatly influenced the strength of the monsoon in the 

 Bay of Bengal, and which was probably abnormal, though in the absence of 

 earlier registers, this cannot be confidently asserted. 



In the upper part of the Ganges valley, in the province of Oude, a very 

 unusual depression appeared in the later months of 1872 and lasted up to 

 the close of the monsoon of 1873. These facts are shewn in the tables for 

 the year at the end of this paper; 



As in the previous years, the tables shew a general persistence of the 

 relative anomalies, with some interruptions, traceable to the unequal inci- 

 dence of general temporary fluctuations. Thus, in February, when the 

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