The secretary and all clerks and other persons in the employment of the Board of Manufactures in any capacity immediately before the establishment of the Board shall from and after such establishment be transferred and attached to, and be under the control of, the Board, and shall hold their offices by the same tenure and upon the same terms and conditions as if this Act had not passed, and while performing the same duties, shall receive not less salaries or remuneration and be entitled to not less pensions (if any) than they would have received or been' entitled to if this Act had not passed : Provided that it shall be lawful for the Treasury to grant a superannuation or other-allowance under the Superannuation Acts, 1834 to 1887, to any person so transferred, as if lie had been admitted to his office under the Board of Manufactures with a certificate from-the Civil Service Commissioners or were otherwise qualified under the said Acts.