rves especially, of any nature whatever. The metallic W. Wiseman, of the East Indian Government Railway De- ' strip is made of very hard laminated copper, slightly pla- winged-wheels of novel construction. | tinized to prevent oxidation; or it may be of silver. Its partment. In the specification it… … is prolonged beyond the trape- in adouble seated slide valve, zium, and to this prolongation, similar to the ordinary slide at a point previously determined valve fitted within a case in the by calculation, is fixed the sensitive strip of metal. As for the opposite side of the frame, it ends ina…
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