amounting to eighty thousand dollars, shall be delivered as aforesaid; and for the graduation and superstructure of each additional mile of road, graded and laid continuously through either of the towns of Buckland, Charlemont, Rowe or Florida, another portion of said scrip, amounting to twenty thousand dollars, shall be delivered as aforesaid: _provided_, that when the rails shall have been laid and the road put in running order, between Greenfield and the east end of the Hoosac Tunnel, excepting that portion of the road which is to be made from the material to be furnished by the tunnel itself, another portion of said scrip, amounting to one hundred thousand dollars, shall be delivered as aforesaid: and _provided_, _also_, that whenever the aggregate amount of scrip that shall have been delivered to the treasurer of said company shall have reached the sum of one million seven hundred thousand dollars, no further delivery of scrip shall be made until the whole of the tunnel through the Hoosac Mountain shall have been completed, of size not less than fourteen feet in width and eighteen feet in height from the bottom to the top of the excavation, and until the facades of the said tunnel and such portions as may require arching shall be finished with good substantial stone or brick masonry, and until the rails shall have been laid over the whole length of the road, including the tunnel, and the same constructed in such manner, and the necessary connections with other roads 80 finished, as will permit the convenient use of the same in the transportation of passengers and freight between the cities of Boston and Troy; but when such connections shall have been made, the tunnel fully completed and the road constructed as herein before provided, the balance of said scrip, amounting to three hundred thousand dollars, shall be delivered as aforesaid: and _provided_, _also_, that until the rails shall have been laid and the road put in running order between Greenfield and Shelburne Falls, the aggregate payments under this act shall not exceed one million of dollars: and _provided_, _also_, that prior to the second delivery of scrip to the treasurer of the Troy and Greenfield Railroad Corporation, according to the provisions of this section, evidence shall be furnished, satisfactory to the governor and council, that a sum equal to thirty per cent. of the amount of the scrip then applied for, shall have been actually paid to the treasurer of said corporation, (in cash,) by the stockholders thereof, in addition to the one hundred and twenty thousand dollars to be paid prior to the delivery of any scrip, and that on each application for scrip, in pursuance of the provisions of this section, and prior to the delivery thereof, satisfactory evidence shall be furnished to the governor and council that a sum equal to thirty per cent. of the amount of scrip then' applied for, has been actually paid