224 Report of the Meteorolof/ical Sub-Committee foi- 1889. 



glad to bear of stations with daily records at Botley Hill and 

 Betsom Hill, Knockholt and Eritli. 



With reference to the rainfall during the year, if it is allowable 

 to take as a fair average the records of the stations in the district 

 which have the longest reliable average, namely, Greenwich, 

 with 45 years, and Kew and Surbiton, with 30 years, it would 

 seem that it has been deficient. All these stations, it should be 

 noted, are in the Thames valley ; and, perhaps, it would be 

 hardly right to compare them with stations more in the interior 

 of the district, but for the fact that the result of a short rainfall 

 is borne out by the shorter averages, 15 years and 10 years, of 

 several other stations. Taking all these averages into considera- 

 tion, it is probable that the average deficiency of the rainfall 

 has been about 1 inch. Of the falls of rain in the district, of 

 1 inch and upwards in 24 hours, the only remarkable one is that 

 of September 2nd, in the Darenth Valley. This day will long be 

 remembered in that district. A thunderstorm raged in Essex on 

 that day ; at North Ockendon, 4-55 inches of rain fell, and at 

 Upminster Hall, 4-32 inches. At Dartford, 4-00 inches fell, at 

 Wilmington, 3-90 inches, and at Farningham Hill, 2-46 inches. 

 It would have been interesting to have traced the course of this 

 storm, had there been a sufiicient number of stations on the 

 extreme eastern portion of the district. 



In conclusion, the Sub-Committee ventures to express a hope 

 that members of the Club will seek to secure the help of persons 

 willing to provide and keep rain gauges in the south-eastern, 

 eastern, and north-east portions of the district. 



