In fixing these values, the drift of public sentiment—the bias of juries of view and of trial juries—at the time the estimate of cost of reproduction is made must be considered, since that sentiment may affect enormously the cost of the right of way. The amount to be paid for a right of way is in the end that which a condemnation court will award. The question as to whether or not the right of way was originally donated can no more enter into the determination of the cost of reproduction, for the purpose of lessening the estimate of cost of acquiring the right of way, than the fact that donations of lands or bonds (or of convict labor and slave labor, as in the South prior to 1860) made by governmental authority or private enterprise, at the time of the original construction, can be used to reduce the reproduction cost of the excavation made in the formation of the roadway. No rule as to the sale of property for commercial purposes in the vicinity of an operated railway can be rightfully adapted as covering the line as a whole. While the cost of right of way through farm or timber lands bears a general relation to the value of those for agricultural purposes, where improvements thereon bear but a small proportion to their total value, this relation is wholly wanting in the cost of a right of way through a village or city or at any point where the improvements on the property bear a large proportion to its total value. The relation is also wanting where a right of way is obtained through agricultural lands devoted to special purposes, like that of country homes for the rich. It is also wanting where the right of way is taken out of the narrow river lands in the Appalachian Mountains, where the total value of the whole farm is dependent on the small acreage of flat land along the river bank. The general rule of prefixing a constant to the current selling price of lands, in order to determine the estimated cost of right of way, should be limited to agricultural and timber lands, and to those which, owing to their extent, the carving out of the right of way does not wholly destroy for the continuation of agricultural and timber operations.