MAY 20 1893. Arrowroot Manufacture in Queensland. 4 IP 0 United States and Europe in 1893. Sawdust Building Bricks. RECENTLY PATENTED INVENTIONS. BALANCED SLIDE VALVEDaniel Railway Appliances. Agricultural. Miscellaneous. BURGLAR AND FIRE ALARMWilliam, scientific american, 1893-05-20
MAY 20 1893. Arrowroot Manufacture in Queensland. 4 IP 0 United States and Europe in 1893. Sawdust Building Bricks. RECENTLY PATENTED INVENTIONS. BALANCED SLIDE VALVEDaniel Railway Appliances. Agricultural. Miscellaneous. BURGLAR AND FIRE ALARMWilliam, scientific american, 1893-05-20
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