SECT. 2. The governor is hereby authorized to draw his warrant on the treasurer of the Commonwealth for such sums as may be required from time to time by said commissioners for the purpose of carrying out the provisions of this act, and the act or acts to which this is in addition; and there is accordingly hereby appropriated for the purpose of constructing and completing said tunnel and railroad and equipping the the same, and paying interest upon such scrip, as has been or may be issued during the progress of the work, the unexpended balance of the two millions of dollars authorized by chapter two hundred and twenty-six of the acts of the year eighteen hundred and fifty-four, and referred to in chapter one hundred and fifty-six of the acts of the year eighteen hundred and sixty-two. And the treasurer of the Commonwealth is hereby authorized, upon the warrant of the governor drawn as aforesaid, to issue scrip or certificates of debt to the amount of said appropriation, which shall be expressed in such currency and shall bear such rate of interest as the governor and council may direct, and shall be redeemable at the end of thirty years from the date thereof: and said treasurer shall sell or otherwise dispose of the same as he may deem proper, subject to the approval of the governor and council. SECT. 3. Said commissioners', and their successors in office, shall be removable by the governor, with the advice of the council, and in case of any vacancy occasioned by death; resignation or removal, such vacancy shall be filled by appointment of the governor, with the advice of the council; and said commissioners shall, once in three months, and oftener if required, present to the governor and council an account of all contracts entered into by them as such commissioners, and of all payments and charges by them made, by virtue of their commission, with their vouchers therefore, which vouchers and accounts shall be examined, and if found correct, and in good faith, shall be allowed by the governor and council; but no lease of any part of said railroad, nor any contract amounting to more than ten thousand dollars shall be made by said commissioners without the of the governor and council.