A second kind of productive co-operation is found in the arrangement known as co-partnership. This is "the system under which, in the first place, a substantial and known share of the profit of a business belongs to the workers in it, not by right of any shares they may hold, or any other title, but simply by right of the labour they have contributed to make the profit; and, in the second place, every worker is at liberty to invest his profit, or any other savings, in shares of the society or company, and so become a member entitled to vote on the affairs of the body which employs him."[156] So far as its first, or profit sharing, feature is concerned, co-partnership is not genuine co-operation, for it includes neither ownership of capital nor management of the business. Co-operative action begins only with the adoption of the second element. In most of the existing co-partnership concerns, all the employés are urged, and many of them required to invest at least a part of their profits in the capital stock. The most notable and successful of these experiments is that carried on by the South Metropolitan Gas Company of London. Practically all the company's 6,000 employés are now among its stockholders. Although their combined holdings are only about one-twenty-eighth of the total, they are empowered to select two of the ten members of the board of directors. Essentially the same co-partnership arrangements have been adopted by about one-half the privately owned gas companies of Great Britain. In none of them, however, have the workers obtained as yet such a large percentage of either ownership or control as in the South Metropolitan. Co-partnership exists in several other enterprises in Great Britain, and is found in a considerable number of French concerns. There are a few instances in the United States, the most thoroughgoing being that of N. O. Nelson & Co. at Le Claire, Ill.