Tho "cemont gun," a device for patting concrete in place by compressed air, is being used by the United States array in the Hawaiian Islands, and is proving of value in the construction of th« ordnance shop at Fort Rugcr. Tho apparatus wus originally provided with a nozzle that liccanw worn and clogged eaeily. These, difficulties were 6vereomc whon Captain I'Avvards, invented a rubberlinod nozzle that gave complete satisfaction. The "gun" consists of an air compressor, n four-cylinder marine gaisolmo engine of 20 h.p. a lin wire-bound rubber hoso with wall's gin thick for delivering dry sand and comnnt mixed, an ordinary garden hose ior delivering water to tho nozule of tho gun, and tilt! gun or nozzle itself. A San Francisco earthqnake-proof hotel is constructed of iron nnd in the form of two hollow squnrce, one witiiin tho otner, arranged u u to brace each other.
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Bibliographic details
Otago Daily Times, Issue 16315, 23 February 1915, Page 8
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147Untitled Otago Daily Times, Issue 16315, 23 February 1915, Page 8
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