1. W. Woglom, Arch. Path.2, 533 and 709 (1926).
2. H. Holmgren andG. Wohlfart, Cancer Res.7, 686 (1947).
3. W. Cramer andW. L. Simpson, Cancer Res.4, 601 (1944).
4. W. L. Simpson inConnective Tissue in Health and Disease (Ed. G. Asboe-Hansen, Copenhagen, Munksgaard 1954), p. 225.
5. R. Cass, P. B. Marshall, andJ. F. Riley, J. Physiol. (to be published).