FROM THE PRACTICAL VIEWPOINT 



posts beside it. This form is of value to the in- 

 spector, since by placing his seal upon it he can 

 be sure that no change is made in the recorder 

 during his absence. 



In other instruments other means of adjustment 

 are provided. If, as in some forms, the coil is so 

 placed that its axis of rotation is the same as that 

 of the recording arm, then no movement of the arm 

 at the joint can affect the relative temperature 

 valves of the varying degree spaces upon the chart. 

 With this form there appears also to be less lia- 

 bility to vibrate with the vibration of the walls of 

 the buiding in which it is placed. This form also 

 has the advantage that the knob or screw which 

 holds the chart to the face of the dial is so ar- 

 ranged that the chart cannot be left loose upon the 

 apparatus, but must either be securely fastened 

 or left off the instrument altogether. It is also 

 very easy to fasten the chart to the clock face. 



It has frequently been found by inspectors that 

 instruments were not accurately adjusted. This 

 may be due to a defect in the instrument itself, or 

 it may be due to an intentional false adjustment 

 by the man who is operating the pasteurizer. He 

 may wish to indicate upon the chart a higher tem- 



147 



