Section 3. And be it further enacted by the authority aforesaid, That the building now called the Lazaretto, and the ground therewith reserved and occupied, and all the property and estate of every kind whatsoever, now vested in the present board of health, shall become and be fully vested in the board of health constituted by this act immediately, and as soon as the same shall be organised for the uses and purposes for which the said board is instituted and established, and the same shall be fully and entirely under the direction and management of the said board. And the said board shall have power to erect such buildings, and to make such enclosures on the lot or tract adjoining the Lazaretto, as to them may seem proper and necessary.