* COMMON XBOX_BOUNDS - axis pointers used by SHADE within PLOT+
* V697 *acm* Ticket 2344: Allow time series overlay on any Hovmuller plot
*            factor for converting the time axis to units of hours was set 
*            in AXIS_FORMAT

	INTEGER bb_xaxis, bb_yaxis, bb_grid, bb_grid_inccount
	REAL*8	fac_hr_x, fac_hr_y
	COMMON/ XBOX_BOUNDS / bb_xaxis, bb_yaxis, bb_grid, bb_grid_inccount, 
     .		fac_hr_x, fac_hr_y
