“…Accordingly, a dispersion of soybean protein in aqueous formaldehyde solution was developed, which, in concentrations up to 10 per cent protein, remained stable for long, periods. This development is described in detail elsewhere (9), so it is sufficient merely to outline here the method for its preparation. For this investigation, conducted as it was on a small laboratory scale, the commercial soybean "alpha"protein was used in preparing the soybean protein-formalde- 1 Previous papers in this series appeared in 1938 (pages 437 and 1236), in 1939 (page 84), and in 1940 (page 1002).…”