Glacier FarmMedia MarketsFarm – The Canadian dollar was up slightly on Tuesday morning, staying above the 74 United States cent mark. The loonie was at US$0.7424 or US$1=C$1.3470 as of 8:37 a.m. CDT, compared to US$0.7418 or US$1=C$1.3481 on Monday. The United States Dollar Index was up 0.01 of a point at 100.86. After substantial gains