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Scientific American, Vol. 94, No. 22 (1906) (1906)
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ion at Rome, practically com- the other and over each trom negatives originally If practical in walls, would it also do for use in floors, pleted its labors on May 22. The Congress has in- taken in the camera, through screens of red, green, augurated several changes which directly affect the and if… … age both of the wood and of the concrete would prob- —————3c©C426->_—— The manufacture of cement in the United States con- ably not be sufficient to cause much damage, and the tinues to make remarkable progress. Whereas in 1890 steel bonds imbedded in the concrete secured to the then developing the…Internet Archive · Public domain (published before 1931). Free to use for anything.
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