CLIMATE. 35 



The average for Sowerby Bridge is drawn from only 

 two years' observations, 1828-9; the others are from five 

 years, 1825-9. In 1828, the rain at Moss Lock was up- 

 wards of seven inches more than at Sowerby Bridge ; in 

 1829, it was about half an inch less. In the other places, 

 the means of each of these two years exceeded the means 

 for Sowerby Bridge. 



" Blackstone Edge gauge is kept at the reservoir of the 

 canal, near the summit of the mountain separating Lan- 

 cashire and Yorkshire. Around it is an extensive area of 

 moderate elevation, which supplies the waters of the re- 

 servoir. The mountain range is from the south-east to 

 the north-west, and is consequently flanked on the Lan- 

 cashire side by the south-west wind, and on the Yorkshire 

 side by the north-east wind; which two may be called 

 the wet and dry winds of this country. The gauge at Moss 

 Lock is near Rochdale, about six miles to the south-west 

 of that on Blackstone Edge, and the country to the south- 

 west is flat. The gauge at Sowerby Bridge is about seven 

 miles to the north-east of that on Blackstone Edge, at a 

 considerable distance from the mountain. The gauge at 

 Stubbins is about five miles to the north of the line of 

 the other three gauges, and is situate in a deep, narrow, 

 and tortuous valley, surrounded by mountains from 300 

 to 1200 feet of elevation above its level." 



The amount of rain, as distributed through the different 

 months, offers some points worthy of notice. In the 

 Annals of Philosophy, Dr. Dalton has given the table of 

 monthly means which is copied on the following page, with 

 a slight alteration from the omission of Continental places ; 

 some few of which were included by Dr. Dalton in the 

 original table. 



c 6 



