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Rh to say, which, at a temperature of 15 degrees centigrade and with distilled water, shall yield 20 drops to the gramme.

Governments which have not taken part in the present Agreement shall be allowed at their own request to signify their adhesion to it. Such adhesion shall be notified, through the proper diplomatic channel, to the Belgian Government, and by it to the other Signatory Governments.

The present Agreement shall come into force one month after the date of its signature. It is understood, nevertheless, that the stipulations of Articles 1, 2, and 3 shall not become binding upon any one of the Contracting Parties until the publication of a new issue, or of a supplement, of its Pharmacopœia.

In case one or other of the Contracting Parties shall denounce the present Agreement, such denunciation shall take effect only so far as regards itself, and then only six months after the day upon which such denunciation shall have been notified to the Belgian Government.

In witness whereof the Undersigned have signed the present Agreement.

Done at Brussels, the 29th November, 1906, in a single instrument, of which an exact copy shall be delivered to each of the Signatory Governments.