SOME GEO-PHYSICAL OBSERVATIONS AT BURRINJUCK. 



461 



While the curve for the east and west boom has a scale of 

 1*26 seconds of arc to one centimetre. The amount of 

 deflection prior to 24th February 1915 is not known. In 

 the case of the meridian boom an increase in the ordinate 

 represents a deflection of the boom to the west. In the 

 case of the east and west boom an increase in the ordinate 

 corresponds to a deflection of the boom towards the south. 



