Section 10. When the Parryville Bridge company shall have erected and completed a bridge at the place aforesaid, the property thereof shall be vested in the said company, and their successors and assigns, during and unto the end of forty years, to commence from the time when said bridge shall be completed, and the said company, their successors or assigns, are hereby empowered to erect gates and demand and receive tolls as follows, viz: for every foot passenger one cent; for every carriage of whatever description, used for the purposes of the trade or agriculture, having four wheels and drawn by six horses, fifty cents; for such carriage, having four wheels and drawn by five horses, forty-five cents; for every such carriage, having four wheels and drawn by four horses, forty cents; for every such carriage, having four wheels and drawn by three horses, thirty cents; for every such carriage, having four wheels and drawn by two horses, twenty-five cents; for every such carriage, having four wheels and drawn by one horse, twenty cents; for every carriage of whatever description, used for the purpose of personal accommodation or pleasure, having four wheels and drawn by four horses, one dollar; for every such carriage, having four wheels and drawn by two horses, fifty cents; for every such carriage, having four wheels and drawn by one horse, twenty-five cents; for every carriage of whatever description, used for the purpose of trade or agriculture, having two wheels and drawn by four horses, thirty cents; for every such carriage, having two wheels and drawn by three horses, twenty-five cents; for every such carriage, having two wheels and drawn by two horses, twenty cents; for every such carriage, having two wheels and drawn by one horse, twelve and a half cents; for every chair or other two wheeled carriage of pleasure, and for every horse used therein, fifteen cents; for every sleigh or sled drawn by four horses, thirty-seven and one half cents; for every sleigh or sled drawn by three horses, thirty-one cents; for every sleigh or sled drawn by two horses, twenty-five cents; for every sleigh or sled drawn by one horse, twelve and one half cents; for every horse, mare or gelding, with or without a rider, four cents; for every carriage drawn by oxen, or partly by oxen and partly by horses, to be rated in proportion of two oxen for one horse, and in all cases a mule shall be rated the same proportion as a horse; for every head of horned or muley cattle, two cents; for every head of sheep or swine, one cent: Provided, That any person or persons attending funerals, going to or returning from divine worship, all persons going to or returning from elections or military trains, and students or children attending schools or seminaries of learning, shall at all times be exempted from the payment of any toll: And provided, That noting in this act shall be so construed as to prevent the said company from contracting with any person or persons, desirous of using said bridge, for an annual sum in place of toll hereinbefore mentioned: And provided also, That when the toll shall exceed fifteen per cent, nett annual profit, the excess shall compose a fund for the redemption of the bridge, so as to render it free, save that there shall always be a small toll collected for keeping it in repair; and if at the expiration of the forty years aforesaid, the amount of the said fund shall be found adequate to the redemption of said bridge, so as to declare it free, (providing at the same time for its repairs,) then the said company shall be obliged to take such sum of money therefor as shall be allowed on a fair appraisement, by disinterested persons, to be chosen in such manner as directed by law; but if the said bridge shall not be redeemed and paid for as a free bridge, at the expiration of the said term of forty years, the said corporation may and shall continue to hold the same, on the terms of this act, beyond the said term, until the same shall be redeemed and paid for in the manner herein directed, or in some other manner as may be directed by the legislature.