AUGUST 16 1879. gCrientifir merin. OMIIP Another Juvenile Prodigy. A NEW PISTON ROD PACKING. St. Petersburg as a Seaport. AN IMPROVED CHURN. PARKER'S CHURN. Value of a Trade Mark. HEWITT'S PISTON ROD PACKING. The Electrical Balance. ENGINEERING INVENTIONS., scientific american, 1879-08-16
AUGUST 16 1879. gCrientifir merin. OMIIP Another Juvenile Prodigy. A NEW PISTON ROD PACKING. St. Petersburg as a Seaport. AN IMPROVED CHURN. PARKER'S CHURN. Value of a Trade Mark. HEWITT'S PISTON ROD PACKING. The Electrical Balance. ENGINEERING INVENTIONS., scientific american, 1879-08-16
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