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Scientific American, Vol. 21, No. 14 (October 1869) (1869)

leaf 7

An illustration from Scientific American, Vol. 21, No. 14 (October 1869), 1869, leaf 7
builders." expenses until the end of September. There will then be ofi who may be addressed for further information. hand $30,000 of appropriation for this year. Aside from this IMPBOVEMENT IN BLASTING CHARGES. saving, the entire work of the office has been performed with A Grain Kinder-—How… … bronzing process and are not affected by atmospheric in- ing. This is accomplished by arranging the charge insuch here and in other countries, proves the wide gage to be a fluences The Building News says : " They have been experi- a manner as to get all the explosive power of the powder, great…

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