_The Minnesota Appraisal_ 169 _The Texas Appraisal_ 169 _The Washington Appraisal_ 170 _The Wisconsin Appraisal_ 170 _Water-Works Valuation_ 170 DISCUSSION FRED LAVIS, M. AM. SOC. C. E.—The author states that his paper is confined to "a discussion of the methods which should be used in arriving at a correct figure of cost of reproduction and depreciation," and that "it does not take up questions involving the propriety of those figures when reached." In so far as this is concerned, it is probably the most complete compilation of the available information on this phase of the subject which has yet appeared in print. The author refuses to recognize that the consideration of the so-called intangible values has any place in a physical valuation. As, however, there exists such a widespread feeling, especially among those interested in railroads, that physical valuations, for any purpose whatever, are absolutely useless, because these intangible values are not or cannot be included, it does not seem out of place to refer to this phase of the subject at this time, and more especially in view of the fact that many persons, the prominence of whose position entitles them to consideration, have taken this point of view very recently, and their remarks have received considerable publicity. Not more than two weeks ago, Judge Lovett, the head of the Harriman System, expressed the opinion that the theory of valuing railroad property by trying to determine the cost of reproduction was utterly impractical. It seems important, therefore, that we, as engineers, interested in having the question properly understood, should be careful, in referring to valuation, to make it plain that other features besides the value of the physical property are to receive due consideration. The speaker, therefore, proposes to examine some of the arguments advanced by the opponents of valuation to see if the objections most generally brought forward are insuperable. Some critics of valuation go so far as to say that engineers cannot make a close valuation of even the purely physical property. For instance, Mr. W. H. Williams, Vice-President of the Delaware and Hudson Company, in a paper on this subject,[19] states that: "No engineer in estimating on the several important items of construction work for the year will come within 10 per cent. of the total aggregate cost. Many of the more important items are frequently underestimated 25 to 50 per cent."