British Bronze Standard Avoirdupois Pound. Silbermann Kilogramme. Fig. Siackrath Vacuum Balance for Comparing Standard Kilogrammes. Fig. 3Sfickrath Balance of National Bureau of Standards. Fig. IInternational Standard Kilogramme. UNITED STATES NATIONAL BUREAU OF STANDARDS., scientific american, 1905-12-02
British Bronze Standard Avoirdupois Pound. Silbermann Kilogramme. Fig. Siackrath Vacuum Balance for Comparing Standard Kilogrammes. Fig. 3Sfickrath Balance of National Bureau of Standards. Fig. IInternational Standard Kilogramme. UNITED STATES NATIONAL BUREAU OF STANDARDS., scientific american, 1905-12-02
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