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Rh In testimony whereof the respective plenipotentiaries have attached their signatures and have hereunto affixed their seals of arms.

Done at Paris, May 20, 1875.

The international bureau of weights and measures shall be established in a special building, possessing all the necessary safeguards of stillness and stability.

It shall comprise, in addition to the vault, which shall be devoted to the safe-keeping of the prototypes, rooms for mounting the comparators and balances; a laboratory, a library, a room for the archives, work-rooms for the employés, and lodgings for the watchmen and attendants.

It shall be the duty of the international committee to acquire and fit up the aforesaid building and to set in operation the work for which it was designed.

In case of the committee's inability to obtain a suitable building, one shall be built under its direction and in accordance with its plans.

The French Government shall, at the request of the international committee, take the necessary measures to cause the bureau to be recognized as an establishment of public utility.