schlink: hysteresis of indicating instruments 



41 



over the actual maximum range of movement involved in the 

 weighing of the capacity load.^ Limitations of space prohibit 



L0AD,OZ. 



Fig. 2. Results of cyclic calibrations of stabilized-platform pointer-and-dial type 

 of spring scale. Dotted lines connect points in a series of observations in which 

 the detail path of the function was not then determined. The niunbers to the 

 right of the determinations indicate the number of the check observations taken, 

 which gave substantially (see text) the same value as the observation recorded. 



detailed consideration of these prerequisites in the present 

 necessarily brief discussion. 



* It was important to determine whether cycUc states set up on different occasions 

 were actually identical, and to this end, the scale was strongly jarred and distiu-bed 

 between successive runs, so as to insure definite dislocation of the acquired relations 

 of journals and bearings, gearing, etc., within the limits, of course, of the clearances 

 obtaining. Renewed cycUc operation of the scale brought about a regularization 

 as perfect as could be desired, a result hardly less than astonishing, when the essential 

 crudity of the instrument is considered. The finish and fit of the moving parts of 

 this type of scale are of a sort that would be considered intolerable in any ordinary 

 engineering instrument, e. g., a Bourdon gage or a pocket voltmeter. 



