ing its exact relation to the French standard, the men were employed to study the methods to carry out being accepted as absolute standards. '•Kilogramme des Archives." The letter accompany- practically the theoretical requirements of the case. The smaller cut is devoted to the collection of ing it… … different keys being re- standards of measure- COLLECTION OF STANDARD GOVERNMENT WEIGHTS. quired to open the vault. ment. It was procured The keys are in charge of tor Mr. F. R. Hassler by M. three separate individuals. The American national J. G. Tralles, early in tiie present century. M. Tralles…
Shaft · Munn · Iron · Scientific American · Center · Congress approved · Central rod · Auxiliary barrel · Large gear · Single copies · Hot water · Express money · Perspective view · Breech cap
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