. PREFACE
rates for an output or for a service to establish. Careful attention
 has been given to the fundamental principles which
should control when appraisals of public utilities are made for
rate-fixing purposes and their practical application is explained.
The tables which are presented in this volume are intended
to meet the needs of valuation engineers, but will also be found
useful by any one having problems of finance and bonding to
solve. They are based throughout on original calculations.
Those relating to replacement requirements and to expectancy
are of a novel type not to be found elsewhere. Special care has
been taken to secure accuracy and convenient arrangement.
Acknowledgment is due to the office staff of the American
Engineering Corporation the members of which have assisted
in the preparation of the tables.
C. E. GRUNSKY.
San Francisco, CAL.
February 1st, 1916.
In the second thousand of this book there will be found a new
paragraph on page 31, suggesting the use of the term ‘natural
rate-base,’”’ and, at the end of the volume, a mathematical demonstration
 of error when the depreciation of any article is determined
 by ordinary methods. Some minor changes and corrections
 of a few typographical errors have also been made.
C. E. GRUNSKY.
San Francisco, CAL.,
April 30th, 1918.

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