1. BE IT ENACTED by the Senate and General Assembly of the State of New Jersey, That no person or persons or corporation shall after the passage of this act, be permitted within this state to erect, have or maintain, or cause to be erected, had or maintained any establishment, storehouse or building in which shall be manufactured, stored, or kept any gun powder, blasting powder, dualin, dynamite, foreite, giant powder, nitro-glycerine or any powder or materials of which nitro-glycerine is an essential ingredient or forms a component part, or any other explosive within the distance of one thousand feet from any public road; and every person or corporation offending against the provisions of this act shall be guilty of a misdemeanor, and, on conviction thereof, shall be liable to a fine not exceeding two thousand dollars; provided, however, that nothing in this act shall be so construed as to prevent any person or persons from storing in fire-proof magazines any quantity of gun powder or blasting powder not exceeding in quantity two thousand pounds, within the said distance of one thousand feet of a public road; and provided, further, that the prohibition in this act contained shall not apply to any establishment storehouse or builhing heretofore erected and used for the manuficturing, storing or keeping of any of said explosive substances.