211 N.W. 478 WILHELM FISHER, Appellee, v. J.C. NICOLA, Appellant. No. 40952.Supreme Court of Iowa. March 8, 1932. Rehearing Denied June 24, 1932. CONTRACTS: Requisites and Validity — Consideration — Mutual 1 Enlargement of Business. Where parties are carrying on a business under written contract, a subsequent and additional oral contract under which they mutually […]