61 
109% sq. miles, over impermeable ground principally, their 
direction of flow is contrary to the dip of the strata, which 
would not be conducive to a large perennial flow, whilst during 
periods of heavy rainfall and snow-melting, they largely con- 
tribute to winter floods in the Thames at Lechlade. 
The rain records at New Swindon are extracted from the 
returns of the Rev. T. A. Preston in the following Table : — 
No. 4 
RAINFALL AT NEW SWINDON. 
1874 | 1875 | 1876 | 1877 | 1878 | 1879 |.1880 | 1881 1882 | 1883 | 1884 | 1885 
ins. | ins. | ins. | ins. gas ins. | ins. aad ins. | ins, | ins. | ins. 
January 0°51 | 2°11} 1°66| 2°88] 3°39 | 2°37 
Feb. ... 3°65 | 2°21} 2°02] 4:07] 1°67) 3°19 
March... 1-98} 1°57] 2°11] 0-96; 1:73 | 1°12 
April 1°95 | 0°69 | 4:08 | 0°80} 1°62 | 1°65 
y 1.08 | 2°32 | 2°20] 2°03] 1°14] 2‘80 
June 3°11 | 2°49 | 4:54) 2°30] 3°18] 2°01 
July 5°17| 1:46| 2°45 | 2°05] 2°62} 0°22 
August 1°19] 5°12} 2°28} 1°37] 1°35] 1°65 
Sept. ... ° 3°48 | 1°48 | 2°80] 3°38] 1°36) 3°59 
Oct. ... 6:01 | 1°41 | 747} 1°83} 1:06} 3°77 
Nov. ... 2°82 | 3:96] 4°43 | 3°13] 1°41] 4°71 
Dec. ... 3°55 | 2°86 | 3°69| 0°73 2°65) 1:20 
woah. | 93-951 35 13, 3751134911 31.31139-60134°501 27-68) 39°73) 25°53 93418 27-78 
The position of the new well now being sunk at Swindon, 
by the Great Western Railway Company, is shown on the 
General Plan, Drawing No. 1. Mr Wii11am Dean, M. Inst. 
C.E., who is conducting the sinking, has kindly given me the 
annexed' section and particulars of the work, which is a very 
interesting one, and it is hoped will be pursued, at all events 
until the Lower Oolites have been fully pierced, and their depth 
ascertained: should they be discovered im situ and series resting 
on the Lias, it is hard to suppose that good water will not 
be found in large volume—artesian in character—in the sands 
at the base of the Inferior Oolite if not above. 
The saline character of the springs that have been encoun- 
tered, both in the Corallian rocks and in the Forest Marble 
(in the latter so decidedly) is remarkable, and indicates no 
doubt, as stated in Mr Horace B. Woopwarp’s paper, read 
