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Scientific American, Vol. 30, No. 25 (1874) (1874)

leaf 7

An illustration from Scientific American, Vol. 30, No. 25 (1874), 1874, leaf 7
spring, C. Its face is notched or serrated to prevent slip- tion of the tunnel. The number of workmen now employed on an sverage daily is 1,880; but this appears to include the labor in extensive workshops outside each of the two Openings. The buring from the Swiss end continues to be entirely… … strengthened, where necessary, by applying it with the point ment will gripe and hold anything that can be introduced, disk, and of turning the arm in the opposite direction from of a fine brush. The colors must not be used too thin. and hence may be applied to other uses than simply extract-…

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