dollars of said scrip shall be reserved until said company, their successors or their representatives, have opened said railroad for use through the Hoosac, and laid a continuous railroad from Greenfield to the line of the state in Williamstown, when the same shall be delivered: provided, 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 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 to the treasurer of said corporation, until six hundred thousand dollars subscribed for have been paid by the stockholders. And no scrip shall be delivered till satisfactory evidence of such payment is, from time to time, furnished to the governor and council. SECT. 3. Whenever the treasurer of said company shall receive any of said scrip, he shall, within three months from the receipt of the same, pay to the commissioners of the sinking fund, by this act hereafter established, ten per cent. on the amount of scrip so taken, as a sinking fund; after the whole of said road is open for us, twenty-five thousand dollars annually, shall be set apart from the income of said road and paid to said commissioners, and the whole thereof shall be added to said sinking fund, and shall be managed, invested and appropriated, as is, or shall be provided by law, in relation thereto. SECT. 4. The treasurer of the Commonwealth, the auditor of accounts of the Commonwealth, and the treasurer of the Troy and Greenfield Railroad Company for the time being, shall be the commissioners of the sinking fund of the Troy and Greenfield Railroad Company. The said commissioners shall have the care and management of all the moneys, funds and securities at any time belonging to said sinking fund, and shall invest the same; but the moneys not invested, and all the securities of said fund, shall be in the custody of the treasurer of said Commonwealth.