§ 238. Assessment of property partly in district. In all cases where
real property is divided by the boundary line of any district, it shall
be the duty of the assessors after fixing the valuation of the whole of
such real property as now required by law, to determine what proportion
of such valuation is on account of that part of such real property lying
within the limits of the district and shall designate the same upon the
assessment-roll. The valuation of the real property lying within such
district so fixed and determined by the assessors shall be the valuation
of said part of such real property for taxation for all district
purposes.