On the succeeding four pages appear some schedules showing the amount of time a pupil should put on each part of the work outlined in this book, in order to carry on the work to good advantage.

These schedules have been carefully compiled and averaged from the work of many pupils and afford excellent guides by which the progress of a pupil may be judged.

The schedules are arranged for a school year of forty weeks, the first schedule allowing for five mechanical drawing periods per week, and the second one for four periods for mechanical drawing and one for freehand drawing. While it is not supposed that all schools can use these schedules without modification, still some can, and in any case the schedules show the relative proportion of time that may properly be assigned to the various problems. or other parts of the work.

The months as named in these schedules do not correspond exactly with the calendar months, but are what may be termed school months, and agree with the record and attendance books provided by the school management for the use of the teachers. It is evident that these schedules as here given, cannot be correct for any two successive years, since some of the holidays named are movable, and most of them occur at slightly varying times in reference to the school year.

The general arrangement, however, and the amount of time assigned each part of the work are sufficiently accurate in many instances, and in any case afford the teacher excellent bases on which to found the calculation for any new arrangement of the work or assignment of time that may seem to him advisable according to the circumstances of the particular case under consideration.