TAX ADMINISTRATION 129 naturally desire to reduce friction to a minimum. Finally, the state property tax is a factor, in that a relatively low valuation in a particular county means a proportionately smaller contribution to the state. Valuations for the General Property Tax The data that comprise Tables 41, 42, and 43 represent the valuations! as approved by the State Board of Equaliza- tion, with the exception of the valuations for the merchants’ and manufacturers’ tax, which are not subject to approval by the Board. Table 41 is a summary table and shows the total property valuations for the years 1917 through 1929 dis- tributed among the principal classes of property, and in Chart 4 the total valuations for taxes of 1917, 1921,1925, and 1929 distributed among the principal categories of property are shown graphically. The total valuation for property taxes, including the private car tax, amounted to $4.9 billion for taxes of 1929. Of this amount, 729, represented the value of real estate—a larger proportion than in any other year of the period. Personal property accounted for ap- proximately 12.8%, of the total; public utility valuations, for 10%; and merchants’ and manufacturers’ valuations, for a little more than 59%. Conditions during the period for which data are given were very troublesome for administrators of the general property tax. The factors influencing values changed with unusual rapidity, particularly during the first half of the period. From 1917 through 1921 assessors had to confront not only rapid changes in real values but also rapid varia- tions in the common denominator of value, the dollar. The fluctuations in the purchasing power of the dollar tended to complicate the attempts of the assessors to secure uniformity. In more recent years farm values have declined and have become a special problem in the assessment process. In valuing property for taxes of 1921 a concerted effort was made to raise valuations to a level nearer actual value, The increase in total valuation amounted to approximately 1 The valuations as approved by the State Board of Equalization are final. How- ever, before computing taxes payable the county clerks make certain corrections occasioned by duplicate assessments and other errors in the assessment process, ~