CHAPTER XIII

CONCRETE EXAMPLES SHOWING DEFINITE THREE POSITION ALTERATIONS AND LABOR UTILIZED

61. _Order of Position Timing and Method of Calculating the Variation._

In submitting the previous chapters it is assumed that the average ambitious watchmaker will gain enough knowledge from the various details to enable him to understand the meaning of the adjustment of watches, the causes of variations and the principal alterations for obtaining corrections.

There are many features covered that will enable him to develop in practice and to experiment in individual points of importance, without running up against mathematical deductions that halt and discourage further interest in the subject.

To understand the principles constitutes a large percentage of the qualifications required and to be able to execute the practical alterations and corrections required in different kinds of variations completes the general qualifications. It would hardly be sufficient, however, to conclude the work at this point without giving more definite examples for comparison, together with some indication as to the approximate time that may ordinarily be utilized in doing the work and also showing some instances of a possible choice of several alterations and why a particular alteration is advisable. For this reason the following examples will be found to have an important part in fulfilling the mission of this book.

In selecting these examples the fineness of results has not been the principal consideration. The deciding factor was the differences in variation and alterations, and the fact that they cover the widest field for general instruction that could be selected from hundreds of equally good rates among various models of watches which, with three exceptions, were put in order for railroad service.

The method of computing the variation from one position to any other is similar to that used in temperature adjusting as described in