It shall be unlawful for any officer or director of any natural-gas company to receive for his own benefit, directly or indirectly, any money or thing of value in respect to the negotiation, hypothecation, or sale by such natural-gas company of any security issued, or to be issued, by such natural-gas company, or to share in any of the proceeds thereof, or to participate in the making or paying of any dividends, other than liquidating dividends, of such natural-gas company from any funds properly included in capital account.