As applied to tracts of land, particularly townships, sections, quarter sections, and other divisions according to the government survey, and also mining claims, this term means that the exterior boundary lines are laid down to include the whole of such a division or such a claim, but that the tract in question does not measure up to the full extent or include the whole acreage, because a portion of it is cut off by an overlapping survey, a river or lake, or some other external interference. See Tolles ton Club v. State, 141 Ind. 197, 38 N. E. 214; Parke v. Meyer, 28 Ark. 287 ; Goltermann v. Schiermeyer, 111 Mo. 404, 19 S. W. 487. Fractionem diei non recipit lex. Lofft, 572. The law does not take notice of a portion of a day.