An Underground Traverse. 



415 



This form has the improvement of mechanical check in the 

 addition or subtraction of co-ordinates, but is weak in the check of 

 angular data. 



Conclusion. 



There is obviously here a much greater tendency to uniformity, 

 which encourages the writer to believe that since all forms of proce- 

 dure tend towards this one object of calculation, it (viz., such 

 procedure) can be made more uniform. In calculation, how^ever, 

 there is room for greater clearness of expression. For instance, in 

 bringing forward an angle of direction (or bearing), no one clearly 

 indicates what line is so directing. The name for the station, the 

 co-ordinates of which have just been calculated, might be marked 

 more clearly. The process of calculation of one point should be 

 separated from that for another by a well-defined space or line. 

 These are quite minor points, but the writer considers them worthy 

 of attention. 



Further, the use of the word " bearing," and the grouping of 

 latitudes and departures into northings, southings, eastings, and 

 westings, should be abolished. These are relics of needle surveying. 

 In this Colony the mine surveyor is working off an astronomical 

 meridian, such a meridian is his north and south line ; it traverses 



