Witnesses appearing before the Grand Jury shall be sworn in the presence of the Grand Jury by the foreman or by some other member appointed by the foreman for that purpose. P.L.L., 1888, §194A 1915, §339 1927, §339 1930, §339 1938, §437 1949, §270 1969, §22-49 1890, ch. 250 1898, ch. 123, §339