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Show What's New By means of a newly invented glue, shoe soles and uppers may be securely fastened together at high speed without with-out the use of nails. The first arc-welded bridge in the world has been successfully constructed construc-ted across the Slutvia river in Poland. Smoke smudges are used in Japan to protect tender mulberry leaves. which feed silkworms, from frost-Good frost-Good progress is being made in the development of a process for making wood fire-proof. Aluminum street cars, only one-half as heavy as steel ones, have been introduced in-troduced in Pittsburg. |