18 Catopondence. Hardening and Tempering Tools. &Swimming with the Clothes On. A New Disinfectant. Measuring the Distance of the Sun. Undetectable Adulterations. Pneumatic Telegraphy. Nickel Mines In Australia., scientific american, 1874-09-19
18 Catopondence. Hardening and Tempering Tools. &Swimming with the Clothes On. A New Disinfectant. Measuring the Distance of the Sun. Undetectable Adulterations. Pneumatic Telegraphy. Nickel Mines In Australia., scientific american, 1874-09-19
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