TRANSACTIONS OF THE SECTIONS. 

 Table II. — Rainfall at Batheaston Reserroirs. 



19 



From the above Tables it appears that the average rainfall at Swans-wick, 

 amounting to 25-78 inches, is less than that at Bath by six inches or more, and 

 less than that at Radstock by bet-ween eight and nine inches, this last being 

 34-59 inches. 



The fall at Batheaston Reservoirs -would seem to be intermediate between Bath 

 and Swanswick ; but it requires to be measured for a longer term of years to de- 

 termine this accurately. 



The above differences are considerable, regard being had to tbe proximity of the 

 several stations, which ai-e not many miles apart ; but they are perhaps not greater 

 than would arise from the difference of level and the configuration of the ground. 

 Swans-wick is on the slope of a hiU, inclining do-wn to Bath ; Radstock Rectory, 

 thouo^h moderately high above the sea, is situate in a valley close to a brook. 



Taking the rainfall of the several seasons respectively, it appears that at both 

 Swans-wick and Radstock the autumn (probably the case in most other places) is the 

 wettest season, and October the wettest month, in the year. 



The diiest season at Swanswick, or in which least rain falls, is the -winter ; at 

 Radstock, the spring. But there is not a great deal of difference between the 

 ■winter and the spring in this respect at either place. 



The greatest yearly fall at Swanswick during the thirty years was 42-64 inches, 

 in 1852. The least yearly fall at the same place was 18^58 inches, in 1854. 



The gi-eatest yearly fall at Radstock during the ten years was 44 •So inches, in 

 1848. The least yearly ftxll was 25 •OS inches, in 1849. 



The greatest quantity fallen in any one month at Swans-wick was 8^32 inches, in 

 November 1852. 



The gi^eatest quantity in any one month at Radstock waa 8^33 inches, in November 

 1842, or nearly the same as that at Swans-wick. 



Mechanics, etc. 



Xew Formula for calculating Steam Pressures, Steam and Volcanos, Bursting 

 of Boilers. By R. A. Peacock, C.E., Jersey. 

 From 25 lbs. per square inch up to 411 •G lbs., the pressure of steam increases as 

 the 4i power of the temperatiu-e, and the temperature increases as the A.\ root of the 

 pressure. Calculations thus made never differ as much as \ per cent., from the 

 experiments of Dr. Fairbaim and M. Regnault, -within that range. The author 

 exhibited a MS. giving fifty cases where steam or hot water had been present in all 



