Alum in baking powder. The complete text of the "Trial examiner's report upon the facts," including a review of scientific testimony concerning alum in baking powder and its hysiological effect, as submitted on November 12, 1925, by trial examiner Edward M. Averill to the Federal trade commission, Washington, D. C., in the matter of Royal baking powder company, docket no. 540 ; accompanied by facsimiles of two orders of the Federal trade commission, printed with special type arrangement and published, with added foreword, notes and indices