the usual thumb-piece being headings of the Severn tunnel, in course of construction for ing representing the persecutions of the Helvetian Christians dispensed with, there are no projecting parts susceptible of the Great Western Railway Company, were united on the catching and causing an… … ed to a gridiron valve, F, hav- neering staff. It should be men- ing steam ports, @ b, and an tioned that the heading from exhaust port, C, working in the Monmouthshire side was conjunction with the steam drjven 11,000 feet from the bot- ports and exhaust ports of the cylinder, as usual. off valve,…
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