Blood-fat

IN a previous paper [Channon and Collinson, 1929] a method of preparing blood-fat has been described and the general nature of a number of samples has been discussed. In the large-scale preparation, 40 1. of ox blood at fasting level yielded 158-9 g. of fat, which contained 1-57 % P, 2-39 % N, 17-04 % sterol precipitated by digitonin, 6-43 % sterol present in ester form, and 8-24 % unsaponifiable matter other than sterol; it yielded 32-46 % of its weight as fatty acids which had molecular weight 294 and iodine value 100.