One of the perplexing questions is the determination of the proper value of the right of way and real estate of a railroad. The land was originally acquired at a certain cost, essentially for public use, and in the course of time its value, as determined by reproduction cost, usually becomes greatly increased by the development of the adjacent land by its various owners. Without the railroad, such development and appreciation of land values would probably not have occurred, and, therefore, it has been argued by many persons that, for taxation purposes, the railroad lands should be appraised at only their original cost, while, for capitalization purposes, they should be appraised at a value measured by that of the adjacent land at the present time. This claim is based on the theory that the railroad is like any other piece of public work, such as a canal, highway, or pavement, which is built for the use of the public, and on which no tax is levied by State or municipality. On the other hand, it has been held by some of our Courts that a proper valuation must take into account the appreciation or depreciation of land values; but, as the opinion of a Court is not unalterable, the soundness of this doctrine cannot be regarded as permanently established. The author states[41] that there can be no serious objection to this doctrine in relation to rights of way in the country and small towns, although he admits that it is subject to exceptions in the case of cities and terminal and dock properties. It will be of great interest to learn his reasons for making such exceptions in the case of the most costly lands, and whether the valuation of such lands should be more or less than that of similar adjacent lands used for other purposes. From the context the inference may be drawn that the valuation should be somewhat higher than that of adjacent similar land in the case of a steam or interurban railroad, because its holdings form a continuous strip; but to the writer this reasoning does not appear satisfactory. The statement of the Court, that "the value of land depends largely upon the use to which it is put and the character of the improvements upon it," does not necessarily involve a higher valuation of the property than its cost, and it is quite conceivable that the actual value of the property after being taken by a railroad may be much less than it was before. The only reason in such a case for maintaining the purchase price is to conserve the general valuation of the adjacent similar real estate.