615 
in good preservation, ox, horse, and the relics of shell-fish, 
oysters, limpets, and cockle, and undoubtedly some human 
bones, more especially those of the fore-arm and fingers, but 
no others. 
I hope these imperfect notes may afford instructive dis- 
cussion among your learned members which may solve the 
mystery of these ancient productions. I would only venture 
to offer mine, that this has been undoubtedly " a Roman 
military out-post," one of the guard stations of the coast. 
I hope at some future time to thoroughly examine the 
whole place, and venture to promise a less hasty and more 
lengthy paper. 
AN ACCOUNT OF SOME EXPERIMENTS WITH THE STEAM JET 
AS A VENTILATOR FOR MINES. BY MR. F. H. PEARCE, 
C.E., OF BOWLING, NEAR BRADFORD. 
A few months ago, the writer's attention was drawn to 
certain alterations required in the pumps employed in 
draining a small colliery in this neighbourhood. The shaft 
is about 120 yards deep, and the nature of the alterations 
was such as to put a stop to the working of the pumps 
for some time ; during this stoppage the water accumulated 
in the workings of the mine, and ascended some distance 
up the shaft, thus completely stopping the system of ventila- 
tion previously employed. 
The ventilation of the pit had no sooner ceased, than 
the accumulation of carbonic acid gas (or choke damp) 
rendered it impossible for the workmen to proceed. Several 
attempts of an ordinary character were made to displace 
the gas but they did not succeed, and there appeared a 
probability of having to incur some expense before proper 
ventilation of the pit could be accomplished. Matters 
