288 MR. A. J. JUKES-BROWNE ON [May 1902, 
Sidmouth (150 feet), we have 1280 feet ; and as the first sandstone 
of these beds may well be 20 feet below the point where the boring 
ended, we shall not be far wrong in assuming that the total 
thickness of the Keuper Marl Series in Eastern Devon is about 
1300 feet. 
In conclusion, [ append an abstract account of the boring, showing 
the several formations through which it passed :— 
Thickness. Depth. 
Feet inches. Feet inches. 
Noband raved ©... camncnkince svitnoancies vee eeba sl eeee 10 8 Opps 
AEST APIUWAS 5b. yiole te costo teers she eames ecianians probably 62 4 73 0 
WW inte Wasi, ceeese do. 22 1 95 1 
Ruatic Beps. | Blk SHRUIES seacedess do. 38 7 133 8 
Grey Maris Wyn do. 39 b 172 9 
(Marls, without gypsum ......... 124 7 297 4 
| Marls, with veins of gypsum... 118 10 416 2 
Clays, with beds of gypsum ... 313 10 730 0 
Kerurer Marts, | Gypsiferous marls, with three 
1129 feet {beds of calcareous sandstone 134 0 864 0 
3 inches. Hard clays and marls, with . 
POSING, wi ciehersanis vei eees ese Me 297 7 1161 7 
Hard silty and micaceous clays, 
| with some gypsum ........... 140 5 1302 0 
It may be added that, after the boring had been completed and the 
boring-appliances removed, water began to flow from the borehole. 
This proved to be a large and constant supply of water, which is 
now led by a pipe into the adjacent brook. I am informed by 
Mr. A. C. Pass that the height to which the water would rise was 
found to be 20 feet above the surface of the ground. 
Discussion. 
The PresrpEnr said that all geologists welcomed the careful 
description and publication of sections of boreholes sunk in our 
sedimentary formations, and this was one of more than ordinary 
importance. While no geologist, probably, would have recom- 
mended this borehole from the economic point of view, its failure 
as a commercial speculation by no means detracted from its value 
from the scientific aspect. Nor should it ever be forgotten that, 
even from the economic side, these so-called ‘ failures ’ had an im- 
portant negative value, in the fact that, as in the present instance, 
they brought home to the minds of the engineer and the speculator an 
easily understood demonstration of the reliability of geological fact 
and deduction, which was certain to remain long in their memory, 
and might lead them to seek geological help in such cases in the 
future. 
Mr. Huptzston said that he felt a local interest in this paper, 
having inspected the cores which were deposited in the Dorset 
County Museum. Hopes had been expressed that coal might be 
found in the county, and the public were greatly indebted to the 
